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Hager BB1279 ETW4 4-1/2" x 4-1/2" 4 Wire Electric Through Wire Hinge
The Hager BB1279 ETW4 is a specialized electrified ball bearing hinge designed to provide a concealed and secure method of transferring low-voltage power from the door frame to the door. Featuring a 4-wire (ETW4) configuration, this hinge is an essential component for access control systems, allowing for the seamless operation of electric locks, exit devices, and monitoring switches. Because the wires are routed internally through the hinge, they are protected from tampering and environmental damage.
Secure Low-Voltage Power Transfer
The BB1279 ETW4 utilizes high-quality 28-gauge wire to handle continuous and pulse currents for a variety of electronic hardware. For maximum security, these hinge pins are not field removable, meaning a separate NRP (Non-Removable Pin) option is not required to prevent unauthorized door removal. This makes it an ideal choice for secure commercial entryways and data centers.
Precision Engineering for Access Control
Constructed from high-strength steel with two ball bearings, this standard weight full mortise hinge ensures smooth, quiet operation. It is designed for 1-3/4" thick doors requiring low-frequency service. By choosing a Hager ETW hinge, you ensure a clean, professional installation without the need for visible power transfers or door cords.
Technical Specifications
| Feature | Specification |
| Model Number | Hager BB1279 ETW4 |
| Hinge Size | 4-1/2" x 4-1/2" (114mm x 114mm) |
| Hinge Type | Full Mortise - Ball Bearing - Electrified |
| Wiring Configuration | 4-Wire (ETW4) |
| Wire Gauge | 28 Gauge |
| Voltage Rating | 48 VDC Max (Low Voltage Only) |
| Continuous Amperage | 3.5 Amps |
| Pulse Amperage | 16.0 Amps |
| Gauge (Thickness) | 0.134" |
| Standards | ANSI A8112 Compliant |
| Security Feature | Non-Removable Pin (Internal Design) |
Installation and Hardware
Each electrified 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 Notes
- Electric Current Transfer: Designed for low voltage applications only.
- Compatibility: Ideal for 1-3/4" thick doors used in medium-weight commercial openings.
- Maintenance: The button tip and plug design provide a clean aesthetic that matches standard BB1279 ball bearing hinges used on the remainder of the door.
| General - US Finishes | US26D - Satin Chrome or US26 - Polished Chrome or US3 - Polished Brass or US10 - Satin Bronze or US10B - Oil Rubbed Bronze |
| 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 |
| Hinge Options | Ball Bearing |
| Electric Hinge Options | 4 Wire, Power Transfer |
| Base Material | Steel |
| Hinge Corners | Square |
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