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Kidde | Replacement 2-Wire Smoke Detector PCB Sensor Kit | SD-2WPCB

Kidde | Replacement 2-Wire Smoke Detector PCB Sensor Kit | SD-2WPCB

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SKU:
KD-SD-2WPCB

The SD-2WPCB drops a fresh sensor board into an existing Kidde KC2 series conventional 2-wire smoke detector housing. The base stays on the ceiling, the loop wiring stays terminated, and the detector is back in service in minutes - no full unit replacement, no drywall patches, no panel reprogramming.

Built for the service call, not the new install

When a conventional 2-wire detector fails a sensitivity test or ages out of compliance, pulling the whole unit is overkill if the base and wiring are still good. This PCB kit replaces just the sensing element and circuit board. It ships with two wire harness connectors for a clean, secure connection to the existing housing. Compatible with Kidde KC2 series conventional detector housings operating on standard 2-wire alarm loops (15-32 VDC).

Key benefits

  • Drop-in PCB swap: replace the sensor board without pulling the base or disturbing loop wiring
  • Cuts service call time: sensor replacement in minutes versus a full detector changeout
  • No panel reprogramming: the detector address and zone assignment stay intact
  • Includes wire harness connectors: everything needed for a clean reconnection to the housing
  • Cost-effective maintenance: extend the service life of installed detectors without full unit cost

Compatibility

Designed for Kidde KC2 series conventional 2-wire smoke detector housings. Verify the installed detector model number before ordering to confirm PCB compatibility. Contact your SS&Si rep for cross-reference help.

Brand:
Kidde Commercial
Form factor:
Replacement PCB sensor kit with wire harness connectors
Compatibility:
Kidde KC2 series conventional 2-wire smoke detector housings
Power input:
Powered via existing 2-wire alarm loop (15-32 VDC)
Operating temp:
32Ā°F to 120Ā°F (0Ā°C to 49Ā°C)
Operating humidity:
10% to 93% RH, non-condensing
Kit contents:
PCB sensor board, 2x wire harness connectors
What detectors does the SD-2WPCB fit?
The SD-2WPCB is a replacement PCB sensor kit designed for Kidde KC2 series conventional 2-wire smoke detector housings. Confirm the installed detector model number before ordering.
Do I need to reprogram the fire alarm panel after swapping the PCB?
No. The replacement PCB connects to the existing 2-wire loop through the original detector base. Zone assignments and device programming on the FACP remain unchanged.
Does this kit include everything needed for the swap?
Yes. The kit includes the replacement PCB sensor board and two wire harness connectors. No additional parts required beyond standard hand tools.
Can I use this to upgrade an ionization detector to photoelectric?
The SD-2WPCB is a like-for-like replacement sensor kit. It restores the original sensing technology of the installed detector. Contact your SS&Si rep if you need to change sensing type - a full detector replacement may be required.
Is the SD-2WPCB listed for commercial fire alarm use?
The replacement PCB is intended for use within UL-listed Kidde KC2 series detector housings. When installed per manufacturer instructions, the detector assembly maintains its original listing. Always verify with the AHJ for your jurisdiction.

Spec Sheet

Download File

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