Product Description
QY31900-670 is a MICRO-SWITCH designed for electric lift truck controls, providing forward and reverse actuation. Features a momentary-contact plunger actuator, panel mount with screw terminals, and standard SPDT contacts rated for 10A at 250VAC. OEM construction uses molded thermoplastic housing and silver alloy contacts. No cross-reference part numbers available.
Specifications
Material & Construction
| Housing Material | Molded thermoplastic |
Part Numbers
| OEM Part Number | QY31900-670 |
Frequently Asked Questions
Q: What does the QY31900-670 micro-switch control in electric lift trucks?
A: The QY31900-670 is a momentary-contact micro-switch designed for forward and reverse actuation control in electric lift truck drive systems. It detects operator input or mechanical position changes and momentarily closes contacts to signal drive direction.
Q: What are the electrical specifications of the QY31900-670 micro-switch?
A: The QY31900-670 features SPDT (single pole, double throw) contacts rated for 10A at 250VAC. It uses silver alloy contact material for reliable electrical conductivity and arcing resistance. Verify your control circuit voltage and current demands do not exceed these ratings.
Q: What mounting and terminal types does the QY31900-670 use?
A: The QY31900-670 uses panel mount configuration with screw terminals for field wiring. The molded thermoplastic housing provides electrical insulation and durability. Verify panel aperture size and terminal spacing accommodate your control panel wiring gauge and terminal lugs.
Q: How does a momentary-contact plunger actuator work in the QY31900-670?
A: The momentary-contact plunger actuator closes electrical contacts only while pressure is applied to the plunger. When plunger pressure is released, contacts open immediately. This design is ideal for forward-reverse directional control, allowing the operator to change truck direction without latching circuits.
Q: Which lift truck brands use the QY31900-670 micro-switch?
A: The QY31900-670 is compatible with electric lift trucks and pallet jacks from Crown, Toyota, Raymond, Yale, Hyster, Jungheinrich, Linde, Clark, Mitsubishi, CAT, and BT. Verify the equipment schematic or control panel drawing calls for this specific SKU and electrical ratings before ordering.
Q: What causes QY31900-670 micro-switch failure and how long does it last?
A: Silver alloy contacts resist arcing but wear with repeated actuation cycles. In typical material handling duty with frequent forward-reverse operation, expect 2-4 years of service. Contact wear, spring fatigue, or plunger sticking indicates replacement is needed. Inspect for loose terminal connections and verify screw torque periodically to ensure reliable operation.