STI G3A125XT-EN Momentary Push Button with Shield
Overview
The G3A125XT-EN is a 12VDC momentary push button designed for request-to-exit and entry request switching in access control systems. The shielded enclosure protects internal contacts from environmental exposure while the momentary action (spring-return) ensures the button reverts to rest state after each press — essential for security applications where sustained activation is a risk. Use this in door strike control circuits, emergency exit override loops, and access point request signals where NC/NO switching logic supports your locking architecture.
Compatibility
The G3A125XT-EN integrates with access control systems and door strike devices operating on 12VDC momentary switch inputs. The internal contact configuration (NC/NO/COM) supports both normally-closed and normally-open strike control logic, allowing deployment across standard electric strike and buzzer-activated door systems. Verify your controller or strike module accepts momentary contact closure before installation — systems expecting maintained (latching) signals will not operate correctly with this button.
Installation Notes
Mount the unit using the supplied bracket and #8 × 1.5 inch fasteners. The 1/2 inch NPT thread opening accommodates standard electrical conduit entry; use appropriate strain relief connectors rated for your environment. Wiring requires four conductors (COM IN, COM OUT, N.O., N.C.) routed to your access control panel — consult your panel wiring diagram for strike activation and request signal assignment. Verify 12VDC supply adequacy at the button location to ensure reliable contact switching; voltage drop across extended runs can prevent proper operation.
What's in the Box
- 1× G3A125XT-EN shielded momentary push button
- 1× mounting bracket
- 2× #8 × 1.5 inch stainless steel screws
- 1× installation sheet
