Bosch D263THS Two Wire Photoelectric Smoke with Heat and Sounder






Two  Wire Photoelectric Smoke Detector with Heat and Sounder
Replaces the Bosch DS-D282THS


The D263 Series Detector models use an infrared (IR) LED light source and a silicon photodiode to measure light in a chamber. A fine screen covers the chamber to deter insects and to reduce dust accumulation and nuisance alarms.  During a fire, smoke particles reflect light onto the photodiode. When the photodiode measurements exceed the alarm threshold, the detector signals an alarm condition. After the alarm condition clears, interrupt power at the control panel to reset the detector.


  • 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
  • Cable connection point for voltmeter sensitivity test
  • Trim Plate TP280 for retrofit and remodeling purposes

Dimensions (Diameter x H): 5 in. x 2 in. (12.7 cm x 5.1 cm)
Material: High impact, fire retardant ABS plastic

Relay Contacts:
Auxiliary Form C:
1 A, 120 VAC/30 VDC at 1 A, 30 W maximum

Power Requirements:
Current Draw (alarm): Determined by control panel
Current Draw (standby): 0.080 mA at 12 V, 0.1 mA maximum
Current Draw (start-up): 0.12 mA
Current Draw (trouble): 0.1 mA maximum
Power-up Time: 22 sec maximum
RMS Ripple (maximum): 25% of DC input
Voltage (stand-by): 8.5 VDC to 33 VDC

Ordering Information:
D263 Two wire photoelectric smoke detector.

D263TH Two wire photoelectric smoke detector with a 135°F (57°C) heat sensor.

D263THC Two wire photoelectric smoke detector with a 135°F (57°C) heat sensor and an auxiliary relay.

D263THS Two wire photoelectric smoke detector with a 135°F (57°C) heat sensor and a sounder.

D1005 Test Cable - Connects a digital voltmeter to the detector's calibration pin for verifying that the detector is within its calibration range

DT2 Detector Removal Tool - Use to remove, replace, or test the detector head

TP280 Trim Plate - For retrofit and remodeling purposes; 16.2 cm (6 in.) diameter

  • Model: Bosch D263THS
  • 0 Units in Stock
  • Manufactured by: Bosch

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