4-Inch Detector Mounting Base W/Relay C/W Trim Skirt
SKU KD-KI-RB4
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The KI-RB4 is the 4-inch version of Kidde's KI Series relay base, adding relay functionality at the detector base for jobs where the rough-in is a 4-inch square electrical box. It ships with the GSA-TS4 trim skirt so the base finishes clean over the wider box opening.
Why installers use it
- Dry contact rated 1 A @ 30 VDC (pilot duty), selectable N.O. or N.C. at installation
- Includes the GSA-TS4 trim skirt to cover the mounting ears and surface imperfections around a 4-inch box
- Can be programmed at the control panel to act as a control relay, not just a follower of detector state
Where it fits
Use the KI-RB4 wherever a KI Series detector needs a base-mounted relay and the rough-in is a 4-inch square box — note it does not support the GSA-LED remote indicator.
Specifications
| SKU | KD-KI-RB4 |
|---|---|
| Brand | Kidde Commercial |
| Function | Relay base for door closers, fans, dampers, 4-inch box |
| Compatible detectors | KI Series smoke, heat, and multisensor detectors |
| Contact rating | 1.0 A @ 30 VDC (pilot duty), N.O./N.C. selectable |
| Mounting | North American 4-inch square box, includes GSA-TS4 trim skirt |
| Wire size | 12-18 AWG |
| Remote LED support | Not supported |
Documents and resources
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Kidde | 4-Inch Detector Mounting Base W/ Fault Isolator C/W Trim Skirt | KI-IB4
KD-KI-IB4
