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07.04.01 Buttons, switches, light signaling hardware

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07.04.01 Buttons, switches, light signaling hardware
Light signaling indicators are intended for indicating the state of electric circuits. They are applied in electric panels, industrial equipment and power supply objects. Various color variants provide for the most efficient arrangement of panels and boards. All devices consist of two units: removable head and contact module. Black NO contact block (1NO) and brown NC unit (1NC).
Sorting: article name
Total: 255 Go to page: 12 3 426
Lampe VKI -211 3P 6A 230/400V IP40 IEK
Article: KVK10-06-3
Max. rated operation voltage Ue AC: 400 V
Conditioned rated short-circuit current Iq: 1 kA
Number of poles: 3
Number of switches: 2
Lampe VKI -216 3P 10A 230/400V IP40 IEK
Article: KVK20-10-3
Max. rated operation voltage Ue AC: 400 V
Conditioned rated short-circuit current Iq: 1 kA
Number of poles: 3
Number of switches: 2
Lampe VKI -230 3P 16A 230/400V IP40 IEK
Article: KVK30-16-3
Max. rated operation voltage Ue AC: 400 V
Conditioned rated short-circuit current Iq: 1 kA
Number of poles: 3
Number of switches: 2
Marking holder DM 11x25
Article: DM11X25
Width: 11 mm
Height: 25 mm
Hole diameter: 22 mm
Marking holder DM 18x25
Article: DM18X25
Width: 18 mm
Height: 25 mm
Hole diameter: 22 mm
Novelty Джойстик LA167-PA12 2 полож. 2з с фиксацией черный IEK
Article: BBJ20-PA12-5-21-2-K02
Number of switch positions: 2
Number of auxiliary contacts as normally closed contact: 2
Rated insulation voltage Ui: 660 V
Номин тепловой ток Ith: 10 A
Novelty Джойстик LA167-PA14 4 полож. 4з с фиксацией черный IEK
Article: BBJ20-PA14-6-21-4-K02
Number of switch positions: 4
Number of auxiliary contacts as normally open contact: 4
Rated insulation voltage Ui: 660 V
Номин тепловой ток Ith: 10 A
Novelty Джойстик LA167-PA22 2 полож. 2з без фиксации черный IEK
Article: BBJ20-PA22-4-22-2-K02
Number of switch positions: 2
Number of auxiliary contacts as normally open contact: 2
Rated insulation voltage Ui: 660 V
Номин тепловой ток Ith: 10 A
Novelty Джойстик LA167-PA24 4 полож. 4з без фиксации черный IEK
Article: BBJ20-PA24-6-22-4-K02
Number of switch positions: 4
Number of auxiliary contacts as normally open contact: 4
Rated insulation voltage Ui: 660 V
Номин тепловой ток Ith: 10 A
Novelty Доп. контакт для светосиг. арматуры 1з для серии D8 IEK
Article: BDK30-1
Number of contacts as normally open contact: 1
Номин тепловой ток Ith: 10 A
Макс присоед способн конт зажимов: 2х2,5 mm²
Total: 255
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Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Advanced design of pusher element, excluding spontaneous falling out.
Advanced design of pusher element, excluding spontaneous falling out.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Advanced design of pusher element, excluding spontaneous falling out.
Advanced design of pusher element, excluding spontaneous falling out.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Using a variety of color options for removable filters allows the most efficient assembly of boards and panels.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Advanced design of pusher element, excluding spontaneous falling out.
Advanced design of pusher element, excluding spontaneous falling out.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Advanced design of pusher element, excluding spontaneous falling out.
Advanced design of pusher element, excluding spontaneous falling out.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Indicators of 12V, 24V, 36V, 110V operate energized both with DC and AC.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Removable neon lamp and removable LED matrix have different colors. LED matrix is universal for the voltage of 12V, 24V, 36V, 110V, 220V of both AC and DC. Possible replacement of neon lamp with LED matrix.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED arrays as a light source, which have longer life and brighter light.
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
The use of LED matrix in the indicator provides more powerful light flux compared with a neon lamp, and an increased service life as well (6000 hours).
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
To prevent the ingress of liquid inside the mechanism all articles are equipped with rubber seal rings.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Additional opening and closing contacts allow to extend the capabilities of switching processes.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Blocks of additional contacts are mounted with the use of special mounting screws to ensure the fastening strength.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Connection of the lead wires is made with the use of screws with Belleville washers which provide a reliable fixation of wires.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Ease of contact module assembly, which is attached to the button with the use of plastic fixing flag.
Metal base insuring the increased operating life of the product.
Metal base insuring the increased operating life of the product.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Possibility of rapid replacement of the light source with the use of LED arrays with BA9s cap.
Quick-release head allows quick replacement of filters and lamps.
Quick-release head allows quick replacement of filters and lamps.
Reliable and convenient system of fixing the product to the mounting panel.
Reliable and convenient system of fixing the product to the mounting panel.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Sealing rubber rings provide protection against ingress of foreign objects inside the mechanism.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
Simplified design concept allows for quick installation and removal of the product on a board or panel.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.
The presence of removable locking (1l) and unlocking (1unl) auxiliary contacts.