Hager BB1279 ETM-4 US26D 4-1/2" x 4-1/2" Electric Transfer & Monitoring Hinge
The Hager BB1279 ETM-4 is a high-performance electrified door hinge that combines 4-wire electric power transfer with a concealed monitoring switch. This "all-in-one" solution allows security professionals to power electric locks or exit devices while simultaneously monitoring the door's open/closed status. Finished in US26D Satin Chrome, this hinge provides a seamless, tamper-resistant method for integrating doors into a building’s access control system.
Advanced Monitoring and Power Capabilities
The ETM-4 (Electric Transfer with Monitoring) feature is designed for maximum versatility. It supports open loop secure, closed loop secure, or single pole double throw (SPDT) configurations. Additionally, the internal switch features an adjustment sensitivity tool, allowing technicians to fine-tune the monitoring trigger point for a wide range of door and frame tolerances.
Secure and Tamper-Resistant Design
To ensure the integrity of your security perimeter, the hinge pins are not field removable, effectively providing the security of an NRP (Non-Removable Pin) without needing a separate designation. By routing both the 28-gauge conductors and the monitor switch through the hinge barrel, the wiring remains completely concealed and protected from vandalism or environmental wear.
Technical Specifications
| Feature | Specification |
| Model Number | Hager BB1279 ETM-4 US26D |
| Hinge Size | 4-1/2" x 4-1/2" (114mm x 114mm) |
| Hinge Type | Full Mortise - Ball Bearing - Electrified |
| Function | 4-Wire Power Transfer + Monitoring Switch |
| Wire Max Rating | 48 VDC / 3.5A Continuous / 16.0A Pulse |
| Switch Max Rating | 30 VDC @ 0.500 Amps |
| Switch Types | Open Loop, Closed Loop, or SPDT |
| Material | Steel with Steel Pin |
| Gauge (Thickness) | 0.134" |
| Bearing Count | Two Ball Bearings |
| Standards | ANSI A8112 Compliant |
Installation and Hardware
Each Hager ETM hinge is furnished with a complete set of high-quality fasteners to ensure a permanent and professional mount:
- All Machine Screws: 1/2" 12-24 FPHM (For metal frame/door applications)
- All Wood Screws: 1-1/4" x 12 FPHW (For wood door/frame applications)
Product Performance Notes
- Electric Current Transfer: Designed for low voltage security applications only.
- Compatibility: Optimized for 1-3/4" thick doors in medium-weight commercial openings.
- Durability: Features a non-rising pin with button tip and plug for a clean aesthetic that matches standard commercial hardware.
| General - US Finishes | US26D - Satin Chrome |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Width | 4.5" Wi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Full Mortise, Electric Hinge |
| Electric Hinge Options | Power Transfer x Monitoring, 4 Wire |
| Hinge Options | Ball Bearing |
| Base Material | Steel |
| Hinge Corners | Square |
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