100w - 120w Elevator Electrical Parts Elevator Bistable Switch Sn-kcb_r-iii Series

An elevator bistable switch is a critical control component in elevator systems, designed to maintain stable electrical contact in either of two distinct positions (open or closed) without continuous power input. This latching mechanism ensures reliable operation of elevator doors, floor selection, or safety circuits by remaining in its last set state until deliberately changed.

Typically constructed with durable materials like silver alloy contacts and high-grade insulation, bistable switches feature a mechanical or magnetic actuation system. Their snap-action design provides positive contact engagement, preventing arcing and reducing contact wear. Common applications include door zone detection, car position verification, and emergency stop circuits, where maintaining state during power fluctuations is crucial.

The switch's hysteresis characteristic prevents chatter during vibration, while its low-power consumption makes it ideal for safety-critical circuits. Modern variants incorporate sealed designs for dust resistance and may integrate with electronic control systems through auxiliary contacts. Compliance with elevator safety standards (EN 81-20, ASME A17.1) ensures fail-safe operation—for instance, forcing a closed-circuit state if door sensors detect obstructions.

Bistable switches contribute to elevator reliability by eliminating the need for constant energization, reducing heat generation and energy use. Their robust design supports millions of cycles, making them indispensable for maintaining operational integrity in both traction and hydraulic elevator systems.

Product Shape

P/N:SN-KCB_R-IIIA/B C cable outlet in the left.
Application in elevator car level for position sensing.
Power:100~120W,voltage:250VAC/DC,current:3.0A;shock-resistance:50G
Testing distance:5mm~15mm;
Bi-stable door switch is with dustproof and explosion-proofplastic case,foreign-made reed switch with orginal package,high life;
Actuating magnet choice depends on actual environment conditions.

FAQ
1. Are the elevator wire ropes durable?
The elevator wire rope has special provisions and requirements. Configuration is not only for wire rope and rated load, but also considered the size of the traction, as a result, the tensile strength of wire rope is greater than the weight of the lift. The safety factor is equipped with more than four wire rope. So it won’t break at the same time.
2. Is it dangerous for power failure suddenly during the elevator running?
If it occurs, the elevator will automatically stop due to the electrical and mechanical safety device. In case of power failure,elevator brakes will automatically taken. In addition, the power supply departments such as planned outage, prior notice are also operating.
3. Will us be hurt when it closed suddenly?
In the closing process, if people touch the hall door, the door of elevator will automatically restart without any danger. With anti clamping switch, once the gate touched, this switching action make the elevator unable to be closed and even reopened. In addition, closing force is also available here.
4. How the elevator running?
Elevators are operated with a counterweight wire rope through the (tractor) traction drive, making ups and downs on the guide rail.
5. Is the escalator installation complicated?
We believe the functions of an escalator are not necessarily proportional to the operation complexity. Therefore, escalators designed by us apply an integrated structure, so that the equipment is more precise and more efficient and allows easier and more convenient commissioning.
6. Do you have any cerifications?
Yes, we do with ISO9001 / CCC / CE Certificates for u.