TRS™ and OHD™ Thermal Sensors

KEMET’s TRS and OHD thermal sensors are used to monitor temperature and maintain stable operation

Image of KEMET's TRS and OHD SeriesThermal sensors are used in a variety of applications and play an important role in maintaining stable operation in electronics by monitoring temperature. KEMET's TRS sensors are thermal reed switches and its OHD series are well-suited for thermal problem countermeasures and safety standard conformity. The unique proprietary design of both sensors features a magnet and temperature-sensing soft ferromagnetic substance called Thermorite®. The material's magnetic flux density decreases as the temperature increases turning it into a paramagnetic substance at the Curie temperature.

Which Thermal Sensor to Choose?

TRS Thermal Reed Switch

The TRS thermal reed switch is a highly reliable, precise, temperature-sensitive switch ideal for energy conservation. These products have been attested by the International Relay Association.

OHD Thermal Guard

Kemet's OHD thermal guard is developed for thermal problem countermeasures and safety standard conformity, which are becoming increasingly important for electronic devices.

TRS Thermal Reed Switch Benefits
  • High reliability for on/off operations
  • High-speed response
  • Long operational life
  • Excellent environmental durability
  • Extremely simple circuit design
  • Compact, light, and easy-to-handle
  • Dust-, explosion-, and corrosion-proof
  • Wide range of operating temperatures available from -10°C to +130°C
  • Excellent temperature accuracy of ±2.5°C
  • UL and CSA approved for TRS5xxxBLRU 100 V
  • UL approved for TRS5xxxBLRVU 200 V
  • RoHS/REACH compliant
TRS Thermal Reed Switch Applications
  • Temperature detection and overheat monitoring of electric appliances
  • Heat-retention heater control for rice cookers
  • Defrost for air conditioners and vending machines
  • Roll heater temperature control for copying machines
  • Radiator water temperature detection for automotive electrical fan control
OHD Thermal Guard Benefits
  • High reliability for on/off operations
  • High-speed response
  • Long operational life
  • Excellent environmental durability
  • Extremely simple circuit design
  • Compact, light, and easy-to-handle
  • Dust-, explosion-, and corrosion-proof
  • Wide range of operating temperatures available in 5°C increments from +30°C to +130°C
  • UL, CSA and TÜV approved
  • RoHS/REACH compliant
  • Compatibility with extremely low (0.1 mW or lower) signals to high power (6 W) levels 
OHD Thermal Guard Applications
  • Atmospheric temperature detection and overheating monitoring of power transistors
  • Power modules
  • Room heaters
  • Hot gas heaters
  • PPCs
  • Amplifiers
  • Motors
  • HDDs
  • FDDs

Engineering Kit

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
THERMAL SENSOR ENGINEERING KITTXS ENG KIT 02THERMAL SENSOR ENGINEERING KIT5 - ImmediateView Details

TRS™ Series Thermal Reed Switches

ImageManufacturer Part NumberDescriptionSwitching TemperatureReset TemperatureAvailable QuantityView Details
THERMAL REED SWITCH 90C 100V BRETRS5-90BLRUTHERMAL REED SWITCH 90C 100V BRE194°F (90°C)176°F (80°C)195 - ImmediateView Details
THERMAL REED SWITCH 60C 200V BRETRS5-60BLRVUTHERMAL REED SWITCH 60C 200V BRE140°F (60°C)122°F (50°C)430 - ImmediateView Details
THERMAL REED SWITCH 50C 200V BRETRS5-50BLRVUTHERMAL REED SWITCH 50C 200V BRE122°F (50°C)104°F (40°C)259 - ImmediateView Details
THERMAL REED SWITCH 110C 100V BRTRS5-110BLRUTHERMAL REED SWITCH 110C 100V BR230°F (110°C)212°F (100°C)300 - ImmediateView Details
THERMAL REED SWITCH 110C 200V BRTRS5-110BLRVUTHERMAL REED SWITCH 110C 200V BR230°F (110°C)212°F (100°C)300 - ImmediateView Details

OHD™ Series Thermal Guards

ImageManufacturer Part NumberDescriptionSwitching TemperatureAvailable QuantityView Details
SENSTHERMOHD3 40C 6W MAKEOHD3-40MSENSTHERMOHD3 40C 6W MAKE104°F (40°C)933 - ImmediateView Details
SENSTHERMOHD5R 100C 1W BREAKOHD5R-100BSENSTHERMOHD5R 100C 1W BREAK212°F (100°C)0View Details
SENSTHERMOHD3 80C 6W BREAKOHD3-80BSENSTHERMOHD3 80C 6W BREAK176°F (80°C)948 - ImmediateView Details
SENSTHERMOHD3 35C 6W BREAKOHD3-35BSENSTHERMOHD3 35C 6W BREAK95°F (35°C)919 - ImmediateView Details
SENSTHERMOHD3 55C 6W BREAKOHD3-55BSENSTHERMOHD3 55C 6W BREAK131°F (55°C)362 - ImmediateView Details
Updated: 2018-10-29
Published: 2016-02-04