HES KA-111A Key Switch Flat Double Bit SPDT On/Off
The HES KA-111A is a mechanical key switch designed for access control and security integration applications requiring reliable, tamper-resistant manual switching. This unit features a SPDT (Single Pole Double Throw) contact configuration with on/off switching capability, housed in a durable aluminum enclosure. The KA-111A accommodates two flat double bit keys, making it ideal for dual-operator or backup-key scenarios in security perimeter control, gate access, and emergency lockdown systems.
Key Features
- Flat Double Bit Key Profile: Double bit design increases resistance to picking and unauthorized key replication, meeting security integration standards for restricted access points
- SPDT Contact Configuration: Single pole, double throw switching provides on/off functionality with latching capability suitable for electromagnetic lock control and solenoid actuation
- 2-Key Capacity: Accommodates two flat double bit keys, enabling dual-operator access or key redundancy in critical security deployments
- Aluminum Housing: Lightweight, corrosion-resistant enclosure suitable for indoor and covered outdoor installations in access control cabinets and equipment racks
- Robust Mechanical Operation: Direct mechanical switching eliminates electronic dependency, ensuring failsafe functionality during power loss or system malfunction
Technical Highlights
- Form Factor: Key Switch with flat double bit profile
- Switching Type: SPDT On/Off with latching mechanism
- Dual-key design for enhanced security and operational redundancy
- Corrosion-resistant aluminum construction for reliable long-term performance
- No electronic components required—purely mechanical operation
Applications
Integrators specify the KA-111A where mechanical reliability and manual override capability are critical components of layered access control architecture. Common deployments include emergency lockdown systems, perimeter gate control, secured equipment rack access, and backup manual activation for electromagnetic lock systems. The dual-key capacity supports multi-operator authorization workflows in high-security facilities where key custody and redundancy are mandatory requirements.
