Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

TRS-P Thermal Reed Sensor for AC Loads



Temperature range of 25°C to 130°C. Less than 3°C tolerance. Normally Closed Contact. Can be used up to 30W loads.



Durable sputtered Ruthenium Contact. RoHS Compliant. Not ESD sensitive. Does not require power for operation.


These thermal reed sensors can accurately monitor temperature within 2-3C and are suitable for a wide range of applications. The load switching capability is that of the reed switch used, which is 30W. As these are a direct replacement to bimetallic strips, these themal reed sensors are only available in a normally closed, form B type contact, which opens when the configured temperature is reached.


Contact FormB
Temperature Tolerance°C±3
Contact Rating (max)W/VA30.0
Switching Current (max)A1.0
Carry Current (max)A2.0
DC Switching Voltage (max)VDC230
AC Switching Voltage (max)VAC230
Breakdown Voltage (min)VDC350
Contact Resistance (max)150
Insulation Resistance (min)Ω109
Capacitance (typ)pF0.2


Operate Time (max)ms0.35
Bounce Time (max)ms0.30
Release Time (max)ms0.15
Resonance Frequency (typ)Hz>2000
Operating Frequency (max)Hz1
Operating Temperature Range°C-20 to Cutout +20
Shock Resistance (½Sin wave for 11ms)G50
Vibration Resistance (10-2000 Hz)G20

Ordering Code

TRS-P-(Cut out temperature)-(Cable length in mm)-(Cable Termination Code)

Cut-out Temperature Range°C25-130
Cable Termination CodeTermination Type
SStripped to 5.0 mm
TStripped and Tinned

TRS-P-50-500-S denotes TRS-P Normally Closed Thermal Reed Sensor with a release of temperature of 50°C, having 500 mm cable length with Stripped ends.

Other Special Configurations: Lower Static Contact Resistance.

Usage Notes

Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.

Product Handling

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Aug 31, 2020

Ferro-magnetic parts

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Cable Handling

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Reed Contact Protection Circuits

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Although we can never restrict the use of a reed sensor to a particular field, the following is a list of some of the applications that the TRS-P Thermal Sensor is known to perform well.

Thermal Reed Switches in Aquariums for controlling Water Temperature

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Dec 1, 2020

Thermal Reed Sensors for Sensing Temperature on Boats

Reed switches in finding boat engine temperature Luxury Yacht Reed Switch based thermal cut-outs are useful in a wide range of applications, either to take certain action like Continue reading ->

Nov 30, 2020

Thermal Reed Switches in Rice Cookers

Reed switches in rice cooker heater control Rice Cooker Rice Cookers are kitchen appliances used to boil rice and continue to keep the rice warm and hydrated. As more heat is Continue reading ->

Nov 30, 2020

TRS-P Thermal Reed Sensor for AC
TRS-P Thermal Reed Sensors from RRE: Normally closed, for 30W line voltage, 20 deg C to 150deg C, complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: TRS-P
3.5 based on 4 reviews