Electric Strikes, Maglocks, and Electrified Locks Compared
| Hardware | How it locks | On power loss | Exit side |
| Electric strike | Replaces the frame strike; the door keeps its latch | Fail-safe or fail-secure, by model or setting | Inside lever or push bar works mechanically |
| Maglock | Electromagnet on the frame holds a steel plate on the door | Always releases | Needs code-required release devices |
| Electrified lock | Solenoid or motor locks the outside lever | Fail-safe or fail-secure versions | Inside lever always free |
Fail-safe hardware unlocks when power is cut. Fail-secure hardware stays locked from outside while the inside lever still lets people out. Exterior doors often go fail-secure, but the right choice depends on the door and the codes that apply.
Because power alone holds a maglock shut, building and fire codes require ways to release it for anyone leaving, typically a sensor that detects a person approaching, a manual release button near the door, and release when the fire alarm activates or power fails. Confirm the plan with your fire marshal or building official first.
Doors with panic bars can take electric latch retraction instead: a valid card pulls the latch, and the bar still opens the door mechanically from inside.