The Command Access Technologies ETH4W4550 626 CH-BB79 Electrified Energy Transfer Hinge provides a discreet, concealed wiring path between the door frame and moving door leaf for compatible electrically operated commercial door hardware. This model is a 4-1/2" high x 5" wide five-knuckle, standard-weight, full-mortise hinge with a 626 / US26D Satin Chrome finish. The CH-BB79 steel-base configuration and four factory-installed 26 AWG conductors make it suitable for properly rated low-voltage commercial access-control and monitoring applications.

Detailed Hinge Selection and Field Verification

The model number identifies the electrified hinge size, wire arrangement and factory finish. This listing is for the following specific factory model:

• ETH4W4550-652-5SW

Physical Fit and Finish

• Hinge template: Verify door and frame mortise, leaf dimensions, thickness, centerline, hinge spacing, screw locations, knuckle pattern and corner preparation before selecting the part. Exact hinge geometry must match the opening even when the visible finish is similar.
• Finish selection: Match the finish code and metal construction to the approved hardware schedule. Do not substitute 626, 613, 612, 630 or other finishes without confirming project requirements.

Electrical System and Commissioning

Determine the connected device's operating voltage, peak current and any monitoring signals; confirm the selected hinge's wire gauges, manufacturer ratings, termination method and available conductor count. Route wiring without sharp edges, pinching or strain through the door swing. After mounting, verify door clearance, continuity, electrical actuation, monitoring signals and relatching under normal operation.

Supplied scope: One selected Command Access transfer hinge assembly as identified by the ordered SKU. Locking devices, access controller, external power supply, extended field wiring and labor are not part of this hinge-only listing.

Exact hinge size matters: The ETH4W4550 measures 4-1/2" in height and 5" in width. It is not the ETH4W5045 (5" high x 4-1/2" wide), ETH4W4545 (4-1/2" x 4-1/2") or ETH4W5050 (5" x 5") model. Verify the hinge dimensions, handing/orientation, screw-hole spacing, gauge, corner preparation and manufacturer's template before ordering or replacing an existing commercial butt hinge.

Correct wiring specification: This is the ETH4W configuration, featuring 4 x 26 AWG wires. It is not the ETH4WH heavy-wire configuration with two 18 AWG power wires plus two 26 AWG conductors. Check the connected lock, electrified trim, reader or monitoring circuit's conductor count, continuous and inrush current, voltage drop and wire allocation to ensure compatibility.

Key Features and Benefits

• Concealed electrical transfer: Routes four low-voltage conductors inside the hinge, helping eliminate exposed wiring loops at the door edge.
• Four 26-gauge wires: Factory-fitted 4 x 26 AWG conductors for appropriately rated low-voltage power, control and status monitoring circuits.
• 4-1/2" x 5" commercial size: Intended for appropriately prepared full-mortise hinge openings matching this unusually wider leaf dimension.
• Five-knuckle standard-weight hinge: The supplier suffix 5SW indicates the five-knuckle standard-weight design; verify the exact manufacturer hinge template.
• 626 / US26D Satin Chrome: Satin chromium-plated appearance on a commercial steel-base hinge, designed to coordinate with 626-finish commercial door hardware.
• 652 / US26D supplier finish code: The distributor identifies the satin chrome plated steel-base finish as 652 / US26D.
• CH-BB79 steel-base construction: Matches the specified steel-base hinge configuration, not the alternative stainless-steel-base CH-BB91 model.
• Clean installation: Protects frame-to-door wiring within the hinge area instead of leaving an exposed, exterior door loop when installed with approved raceways.
• Low-voltage compatibility: Appropriate for selected electric mortise/cylindrical locks, exit trim, door-mounted sensing and other permitted low-current circuits.
• Published ETH4W family electrical guidance: Manufacturer literature lists a 1 amp continuous at 24 VDC rating for designated wire pairings; follow the current factory wiring diagram and connected-device limits.
• Protected wire access: Command Access's energy-transfer family describes protective conductor caps and a center-positioned wire access point; confirm actual lead/connector options on the supplied assembly.
• Manufacturer lead options: Four-foot lead options are described in the ETH family literature. Verify the specific supplied lead length and termination requirements before installation.

Product Specifications

Typical Commercial Applications

• Compatible electrically operated mortise locksets and cylindrical locksets
• Appropriately rated electric exit trims and other low-current electrified door devices
• Door-mounted proximity readers, monitoring contacts, position sensors and signal circuits
• Commercial and institutional doors requiring discreet electrical transfer from the jamb into the door
• Access-control installation or replacement when the existing hinge preparation matches 4-1/2" x 5" and all electrical requirements are met

ETH4W vs. ETH4WH: Choose by Wire Gauge

ETH4W4550 contains four 26 AWG wires. An ETH4WH version instead carries 2 x 18 AWG power wires plus 2 x 26 AWG signal/control wires. High-inrush equipment, motorized latch retraction, or heavy-duty electrified locking devices can require larger power conductors or a separate manufacturer-approved power transfer; do not substitute an all-26-gauge ETH4W hinge solely because the size and finish match.

Ordering and Installation Checklist

1. Confirm hinge measurements: Verify 4-1/2" high x 5" wide. The ETH4W5045 uses the reverse dimensions and is not a dimensional substitute.
2. Match the hinge template: Check screw-hole layout, hinge gauge, corner radius and clearance with the current manufacturer specification and actual door/frame mortises.
3. Verify the finish and base: Specify 626 / US26D Satin Chrome with CH-BB79 steel base and the supplier 652/US26D designation.
4. Review the electrical design: Confirm four 26 AWG conductors, circuit mapping, continuous/inrush load, voltage drop, lead termination, and connected-hardware operating voltage.
5. Prepare approved wireways: Follow manufacturer directions for routing conductors through the hinge jamb and door leaf. Protect wires from pinch points, chafing and sharp edges.
6. Test the installed opening: Check electrical continuity, full swing, latching and locking operation, status circuits and any fire-door/egress requirements.

What's Included

One Command Access ETH4W4550 626 CH-BB79 commercial energy-transfer hinge, 4-1/2" x 5", in 626 Satin Chrome with a four-wire 26 AWG harness. Confirm wiring lead length, connectors and installation fasteners prior to ordering.

Not Included

Door or frame, electric lock, exit device, reader, access-control panel, separate power supply, controller, powered latch-retraction kit or additional field wiring. This product is the electrified hinge only.