In high-risk environments, where unauthorized access or accidental activation can have serious consequences, key switches are the essential guardians of electrical systems. These specialized devices are meticulously designed to allow operation only through the rotation of a carefully designed key, ensuring command exclusivity for industrial machinery, security facilities, and public infrastructure. As a pioneer in electromechanical security solutions, YIJIA manufactures key switches that combine high durability with precise circuit control.
Bridge Structure: Parallel silver-cadmium oxide contacts (99.9% purity), rated for over 100,000 cycles
SPDT (Single Pole Double Throw): Three-way isolation ensures zero cross-contact leakage
Configurable: NO (Normally Open)/NC (Normally Closed) combinations (configurable on request)
Rated Voltage: 12-440VAC/DC
Insulation Resistance: >100MΩ (500VDC)
Dielectric Strength: 2,500VAC/minute
Contact Bounce: <5ms
IP67 Sealing: Withstands 1 meter of water for 30 minutes
Temperature Range: -40°C to +105°C Operating Temperature
Chemical Resistance: Resistant to oils, dilute acids, and dilute alkalis (compliant with IEC 60068-2-43) Standard)
| Component | Material | Performance Benefit |
| Conductive Elements | Brass core + Silver alloy plating | ≤10mΩ resistance; 250VAC/5A load capacity |
| Housing | POM | UL94 V-0 flame retardancy; IK08 impact |
| Key Cylinder | Nickel-plated brass | Anti-pick security (10, 000+ combos) |
| Spring Mechanism | 316 Stainless steel | 500g±5% consistent rotational torque |
Dual-Circuit Normally Closed/Normally Open Fail-Safe Mode
Mushroom-Head Emergency Stop Model
Police/Fire Department Override Key
Anti-Condensation Epoxy-Sealed Terminals
Access Control
RFID Integration
Q: Which key switch contact configuration best prevents accidental machine startup?
A: Use NC (normally closed) contacts in series with the power circuit. Rotation breaks the circuit only when properly engaged, eliminating false startup. YIJIA utilizes dual-circuit isolation and is suitable for SIL 3 safety systems.
Q: How do YIJIA key switches withstand high-vibration industrial environments?
A: The POM housing absorbs resonance, while the silver alloy contacts prevent arc welding.
Q: Can existing security systems be integrated with YIJIA key switches?
A: Absolutely. We offer:
7-pin Medeco® keyway compatibility
Restricted key control system
Custom bit coding with master/sub-master hierarchy
All switches include NEMA TS-2 compliance documentation for municipal approval.
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