Fire-Lite B501-BL 4" Standard European Flangeless Mounting Base, UL/ULC Listed, Black

Optimize fire detection and monitoring installs with the Fire-Lite Alarms by Honeywell B501-BL 4-inch flangeless detector base. Designed for professional security and fire alarm contractors, this black surface-mount detector base delivers fast, reliable connections and a low-profile appearance that fits modern ceilings and European-style applications. SEMS screw terminals accommodate 12–24 AWG conductors to simplify wiring and reduce labor time, while the mechanical locking feature prevents accidental or malicious removal of the attached smoke detector or sounder. UL/ULC listing and UL 268 compliance provide the code-certified performance required for commercial buildings and critical infrastructure. Rated to operate from -4°F to 150°F (-20°C to 65.6°C) and compatible with 15V/32V DC systems, the B501-BL integrates seamlessly into existing fire alarm, security, and building monitoring setups. Choose this base when you need a durable, tamper-resistant platform that speeds deployment and maintains a clean aesthetic. Add the B501-BL to your next fire alarm or surveillance project — contact sales or order online to streamline installation.

• Speeds installation with plug‑in detector design and SEMS screw terminals for reliable, time-saving wiring
• Flangeless 4-inch form factor blends into European and modern ceilings for a low-profile security installation
• Mechanical locking prevents unauthorized removal of detectors, improving tamper resistance for critical monitoring zones
• Supports 12–24 AWG wiring and 15/32V DC input for flexible integration with existing fire alarm and detection systems
• UL/ULC listed and UL 268 compliant for code-ready performance in professional fire safety and building monitoring projects