The Resideo 7939WG-BR surface mount magnetic contact is a precision-engineered security and fire detection component designed for robust perimeter monitoring in commercial and institutional environments. This magnetic reed switch provides critical input for intrusion detection and fire alarm systems, offering reliable performance in door and window monitoring applications.
Engineered for professional installation across addressable fire panels and integrated security networks, this magnetic contact utilizes a durable surface-mount design that enables quick and consistent deployment in challenging architectural environments. Its engineered construction allows for flexible mounting on metal, wood, and composite surfaces while maintaining consistent electrical performance across diverse installation scenarios.
Key Features
- Wide gap sensing technology enabling installation flexibility across diverse door and window configurations
- Rugged zinc alloy housing with corrosion-resistant bronze finish for extended operational lifespan
- Compatible with most commercial fire alarm control panels and addressable notification circuits
- Low-impedance switching mechanism with consistent actuation characteristics
- NFPA 72 compliant design supporting comprehensive life safety system integration
- Low current switching profile suitable for supervised circuit configurations
Specifications
- Switching Configuration: Normally Closed (N/C) reed switch
- Maximum Switching Voltage: 200VDC
- Contact Rating: 0.5W maximum
- Operating Temperature Range: -40°F to +185°F
- Dimensions: Compact form factor suitable for discrete installation
Typical installation environments include commercial office complexes, educational facilities, healthcare institutions, and industrial control rooms where precise perimeter monitoring is essential. Professional fire alarm technicians will appreciate the contact’s robust design and seamless integration capabilities with Honeywell, Notifier, and EST fire alarm control platforms.
UL Listed and compliant with critical safety standards including UL 268 (Smoke Detectors for Fire Protective Signaling Systems) and UL 464 (Audible Signal Appliances), the 7939WG-BR represents a professional-grade solution for comprehensive life safety system design.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 2 × 2 × 1 in |
| Condition | New |
| Manufacturers | Resideo |
| Part Type | Replacement Part |






