Fail-Safe vs Fail-Secure
Understand the difference between fail-safe and fail-secure door hardware and why it matters.
What this means in practice
This page is intended to make the concept visually clear before you move into a full wiring diagram or project plan.
Quick comparison
| Term | Meaning | Typical use |
|---|---|---|
| Fail-safe | Unlocks when power is removed | Common on maglocks and some safety-critical paths |
| Fail-secure | Stays locked when power is removed | Common on many electric strikes |
| Planning implication | Affects egress, emergency behaviour and power design | Always check door use and site requirements |
Common mistakes
- Choosing lock type without thinking about power loss behaviour.
- Ignoring egress and release requirements.
- Assuming every electric strike is fail-secure or every maglock is acceptable anywhere.
Where this appears in real diagrams
FAQs
Can I use this page as a final design?
No. This page is a visual explainer. Use it to understand the concept, then confirm all details against the relevant product manuals and site requirements.
What should I open next?
Open a related wiring diagram, calculator, builder, or planning pack so the concept becomes part of a real project workflow.