SDC TR12 12VDC Plug-In Power Transformer
Overview
The SDC TR12 is a regulated 12VDC plug-in power transformer that converts 120VAC line voltage to a stable 12VDC output rated at 1 Amp. It is built as a Class 2 UL-listed supply designed to power door control devices, electromagnetic locks, and access control readers in commercial installations. The TR12 plugs directly into standard 120VAC outlets, eliminating the need for a dedicated power cabinet or hardwired supply — a practical choice for retrofit access control or single-door installations where run-and-gun deployment matters. Thermal overload protection guards against sustained fault conditions without requiring external circuit breakers.
Compatibility
The TR12 is designed to supply SDC Security Door Controls access control devices and any standard door control load rated for 12VDC at 1 Amp or less. It works with electromagnetic locks, solenoid strikes, card readers, and keypad controllers that draw 12VDC. Screw-terminal output connections accept standard 18–12 AWG wire. Confirm your door control device datasheet specifies 12VDC input before ordering — if your device requires 24VDC or higher voltage, the TR12 will not work.
Installation Notes
Plug the transformer into a standard 120VAC duplex outlet near the door control location. Connect the secondary (output) screw terminals to your 12VDC load using appropriate gauge wire — oversizing wire reduces voltage drop on longer cable runs. For runs over 50 feet, use 14 AWG or heavier to maintain stable voltage at the load. Do not exceed 1 Amp continuous draw or thermal protection will interrupt power. The Class 2 designation means the secondary circuit is intrinsically safe — low-voltage shock hazard is minimal, but still observe standard wiring practices for ground continuity and polarity.
What's in the Box
- 1x SDC TR12 plug-in transformer
