Rate-of-rise Fixed Temperature Heat Detectors280B-PL Series

Manufacture: kidde
Product code: 280B-PL Series

280B-PL Series ⭐
✅  heat detectors offer fixed temperature or combination rate-of-rise and fixed temperature detection ⭐
✅ Hotline 0917 911 1114


Consulting hotline: 0944934114
Product information

RATE-OF-RISE:A temperature increase at the sensor of 15°F (9°C) or more per minute activates the rate-of-rise feature. This closes the contacts in the sensor to transmit the alarm condition to the fire alarm control panel. When the rate-of-rise element alone has been activated, the sensor is self-restoring.

FIXED TEMPERATURE: If the temperature of the center disk rises to the sensor’s rated temperature, the fixed temperature element activates. This closes contacts in the sensor and transmits an alarm condition to the fire alarm control panel. The fixed temperature element is non-restorable and, when activated, the detector must be replaced. The need for replacement is indicated when the center disk has fallen free the detector.

Standard Features

• UL listed for 50 ft. (15.2m) spacing

• Single pole — normally open contact

• Low profile with mounting plate

• Pure white finish

• Mounting flexibility with screw terminals

• Easy twist-on installation

• On-site testing of rate-of-rise feature

• Positive operating indication — for fixed temperature elemen


Heat detectors are most suitable for environments where rapid fire development can be expected. When selecting the location on the ceiling for the heat sensor, do not locate it in direct path of hot or cold air flow. Refer to the detector specifications for the recommended maximum spacing. Earlier detector response may be obtained by reducing the spacing between detectors.


Kidde 280B series heat sensors come standard with a white plastic reversible mounting plate. The plate is designed for surface or flush mounting and installs directly to a standard North American 3½ or 4 inch octagon box. Once the mounting plate is fixed, a simple twist will lock the sensor in place. It can be removed using a screwdriver to release the tamper-resistant locking finger. This helps prevent unauthorized removal. Rate-of-rise/Fixed Temperature Heat Detectors 280B-PL Series.


The plastic mounting plate is molded to accommodate exposed wiring.

Rate-of-rise/Fixed Temperature Heat Detectors280B-PL Series



Catalog Number 281B-PL 282B-PL 283B-PL 284B-PL
UL Temperature Rating 135°F (57°C) 194°F (90°C) 135°F (57°C) 194°F (90°C)

UL Max Ambient Temp. at


100°F (38°C) 150°F (66°C) 100°F (38°C) 150°F (66°C)
Detector Type

Fixed Temperature and Rate-of-

Rise Rate-of-rise:

15° F (9° C), self restoring

Fixed Temperature Only

UL Recommended Coverage

2,500 ft.² (232 m²)
UL Recommended Spacing 50 ft. (15.2 m)
FM Recommended Spacing 30 ft. (9.14 m)

UL Maximum Distance from


25 ft. (7.6m) any wall or projection extending down the

ceiling more than 12 inches (305 mm)

Contacts – Rating

Single Pole Normally Open 3.0 amps at 6 to 125 Vac; 1.0 amp at

6 to 24 Vdc; 0.3 amps at 125 Vdc; 0.1 amps at 250 Vdc

Operating Environment Indoor – Dry
Agency Listings UL, FM, CSFM

Ordering Information

Cat. No. Description

Ship Wt.

lb (kg)

281B-PL Heat Detector, 135°F (57°C), Rate-of-Rise and Fixed Temperature 1.0 (0.5)
282B-PL Heat Detector, 194°F (90°C), Rate-of-Rise and Fixed Temperature
283B-PL Heat Detector, 135°F (57°C), Fixed Temperature
284B-PL Heat Detector, 194°F (90°C), Fixed Temperature


Detector Accessories

Plastic Mounting Plate – White, Reversible (included)


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