Bosch Security D263TH


Two-Wire Smoke/Heat Detector
Two-wire photoelectric smoke detector with a 135°F (57°C) heat sensor.

Availability: Please Call for Lead Time

  • Factory New
Brand: Bosch Security Part #: 50218 Categories: , , , Manufacturer Part #: D263TH Tags: ,


The D263 family includes the following detector models:

Model Description
D263 Two-wire
D263TH Two-wire with 135°F (57°C) heat sensor
D263THS* Two-wire with 135°F (57°C) heat sensor and sounder

* Sounders produce 85 dB at 10 ft (3 m).

Each of these detector models is UL Listed and works with commercial fire protective signaling and household fire warning systems. Each model detects smoke particles produced during wood, paper, and fabric combustion.


Weight 1.00 lbs

Material Qualities


Detection Method





  • 12 V or 24 V input
  • Designed for commercial or residential use
  • Two-wire application
  • Light-emitting diodes (LEDs) indicate the status of the chamber, power, and alarm
  • Removable terminal block to simplify wiring connections


D263 Photoelectric Smoke and Smoke and Heat Detectors
Bosch Security – Data Sheet – 2015
Photoelectric Smoke Detector; D263 / D273 Series
Bosch Security – Installation Instructions – 2006
Two-wire Smoke Detectors; D285 / D286 / D263 / D603 / D604 / D605 / D340
Bosch Security – Technical Service Note – 2017


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