The EB4 emergency door release is designed with replaceable glass for ease of breaking through.

Features:
-Emergency Break Glass EL-EB4 series is equipped with single pole
  change over contacts from N/C to N/O
-It is normally used to override electrical locking / release devices in
case of emergency.
- Can be surface or flush mounted
- Dimension : 87mm W x 87mm H x 52mm D
- Safety Approval : CE
Specification:
Current Rating :
- 12/24V DC 10A
- 48V DC 3A
- 250V AC 10A