Thermal Sensors
TRS Thermal Reed Switch, Screw Type
Overview Applications
The TRS Thermal Reed Switch is a highly reliable, precise Typical applications include radiator water detection
temperature-sensitive switch ideal for energy conservation. and overheat detection for industrial, agricultural and
The screw mounting package of TRS-P makes it easy to set automotive engines.
up in the application, by just screwing it in the device that
needs temperature detection or overheat monitoring.
Its unique proprietary design features a magnet and
a temperature-sensing soft ferromagnetic substance
called Thermorite . The materials magnetic flux density
decreases as the temperature increases turning it into a
paramagnetic substance at the Curie temperature.
These products have also been attested by the International
Relay Association.
Benefits
High reliability for on/off operations Dust, explosion and corrosion-proof
High-speed response Wide range of operating temperatures available
Long operational life from 80C to +120C
Excellent environmental durability Excellent temperature accuracy of 3C
Extremely simple circuit design with the screw mounting RoHS/REACH compliant
Compact, light, and easy to handle
TRS-P1 Type TRS-P2 Type
Built Into Tomorrow
KEMET Electronics Corporation KEMET Tower One East Broward Boulevard SE0219_TRS-P 12/21/2020 1
Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.comThermal Sensors TRS Thermal Reed Switch, Screw Type
Ordering Information
TRS 1- 80 M PR 001
Maximum
Shape
Series Opening/Closing Operating Temperature (C) Contact Type Lead Type
Classification
Power (W)
TRS 1 = 10 W 80 = 80C 105 = 105C B = Break PR = P shape 001 = PT1/8
85 = 85C 110 = 110C M = Make PT screw 002 = PT3/8
90 = 90C 115 = 115C
95 = 95C 120 = 120C
100 = 100C
Structures and Principles of Operation
TM
Thermal Reed Switches (TRS ) are temperature-sensing switches composed of a magnet and a temperature-
TM
sensing soft ferromagnetic substance called Thermorite . This material's saturation magnetic ux density
decreases as the temperature increases, and it turns into a paramagnetic substance at the Curie temperature.
Structures and Principles of Operation
Thermal Reed Switches (TRS) are temperature-sensing switches composed of a magnet and a temperature-sensing soft
ferromagnetic substance called Thermorite. This materials saturation magnetic flux density decreases as the temperature
Temperature sensing ferrite Thermorite
increases, and it turns into a paramagnetic substance at its Curie temperature.
Our self-developed Themorite is temperature sensing ferrite utilizing Curie-temperature,
where ferrites lose its magnetic property.
Thermorite changes its magnetic property rapidly at Curie-temperature. Thermorite properties
Features of Thermorite as temperature sensing material.
Thermorite changes its magnetic property rapidly at its Curie temperature, providing quick response times.
(1) Curie-temperature do not vary as time advances, because it depends on compounding ratio.
The Curie temperature of Thermorite does not vary with time, as it is based on a compounding ratio.
(2) Arbitrary shape available as ceramics.
Thermorite is stable against moisture and hazardous gas.
(3) Stable against moist or hazardous gas.
Thermal property of Thermorite
Permeability - temperature Saturation magnetic ux density temperature
1kHz-0.01Oe
6000 3500
TC30 TC60
TC90
3000
5000
TC120
2500
4000
2000
3000 TC150
TC90 TC150
1500
TC60
2000
1000
TC30 TC120
1000
500
0 0
0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 160
Temperature Temperature
TC=Curie temperature
Encasing Glass tube
Structure of reed switch
Reed switch is contact switch comprised of a pair of
Fe-Ni alloy reeds encased in glass tube
with inactive gas. The reeds are switched on or off
Inactive gas Contact Fe-Ni alloy reed
by magnetic field of permanent magnet or magnet
coil.
Long lifetime, High environmental resistance
because of protected contact by glass encasing.
N S
Reeds in glass tube become magnetized with
SS NN
NN
magnetic field, and then two reeds contact and
SS
connect each other (switch on). And then magnetic
field disappears, the reeds separate and disconnect
KEMET Electronics Corporation KEMET Tower One East Broward Boulevard SE0219_TRS-P 12/21/2020 2
(switch off).
Fort Lauderdale, FL 33301 USA 954-766-2800 www.kemet.com
NEC TOKIN Sensors Vol.145
All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.
Please request for a specification sheet for detailed product data prior to the purchase.
Before using the product in this catalog, please readPrecaution and other safety precautions listed in the printed version catalog.
2015.3.310000SENVOL14E1503H1
Permeability
Saturation magnetic ux density