Kidde KC2-RB KC2 Series Relay Base, 4-Terminals, Auxiliary Relay, 4" Diameter
Heat detection, wired to your panel.
The Kidde KC2-RB is a relay base with a dual rate-of-rise and fixed-temperature sensor, built for AEGIS 2.0 and AEGIS-XLT conventional control units. It has a low-profile 4" design.

A detector base should do more than hold a detector.
A fire detection system depends on every device reporting reliably to the control unit. This base adds an auxiliary relay and a sensor, and it monitors its own operation.
Built for conventional fire systems
The KC2-RB combines sensing, relay switching and self-monitoring in one ceiling base.
Dual-sensor detection
A dual rate-of-rise and fixed-temperature sensor is built into the base.

Dry contact voltage rating
Rated at 1 amp, with normally open or normally closed operation.
Self-diagnostics
Self-diagnostic capability continually monitors operation, and the supervised relay position helps prevent accidental displacement.
Flexible relay contacts
Supports normally open or normally closed operation with a 1 amp dry contact rating at 30 Vdc.
Low-profile design
The 4" diameter base blends into the ceiling, and a remote LED indicator is available for status monitoring.
Everything you need to know.
| Brand | Kidde |
| Model | KC2-RB |
| Color | White |
| Device Supported | Heat Detector |
| Product Type | Detector Base |
| Product Series | KC2 |
| Country of Origin | US |
| Diameter | 4" |
| Terminals | 4 |
| Contact Rating | 1 amp at 30 Vdc |
| Compatible Control Units | AEGIS 2.0 and AEGIS-XLT Conventional |
| Approvals | FM Approved, cULus Listed, California State Fire Marshal Listed |
Kidde KC2-RB KC2 Series Relay Base, 4-Terminals, Auxiliary Relay, 4" Diameter
Need help with compatibility?
Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

Kidde KC2-RB, ready to order.
- Color: White
- Device Supported: Heat Detector
- Product Type: Detector Base
- Product Series: KC2
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