The Siemens SB-5R is a red surface-mount back box for fire alarm initiating devices such as the MS-51 manual pull station, providing a metal enclosure where flush mounting is not an option.

Compliance

• UL listed (initiating-device accessory)
• ULC listed
• NFPA 72 compliant

Key features

• Metal surface-mount enclosure resistant to impact
• Red exterior for clear identification of fire safety equipment
• Protects device wiring and terminations
• Knockouts for surface conduit entry
• Mounting compatible with Siemens pull stations
• Maintains a clean code-compliant surface installation

Siemens back boxes and mounting accessories provide the surface or weatherproof enclosure that notification and initiating devices require where flush mounting into a wall is not available. Correct box selection protects the device wiring and keeps the installation aligned with the appliance family and finish color.

Verify panel and device family compatibility before ordering.