SLRD Series thermal overload relay

Quick Details


  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: suntree
  • Model Number: LRD23
  • Theory: Thermal Relay
  • Usage: Protective
  • Size: Miniature
  • Protect Feature: Sealed
  • Contact Load: Low Power
  • professional manufacture: 10 years
  • Quality guaranteed: 2 years
  • Attestation: CE,ISO9001
  • standard: According to customer demand manufacture
  • Price: The price that has competitiveness
  • International Standard: IEC 60947-4-1
  • National Standard: GB 14048
  • CLASS: A,B
  • website:





SLRD series thermal overload relay is suitable for using in the circuit
rated voltage up to 660V, rated current 38A AC 50/60Hz, for overcurrent
protection of AC motor. The relay has the differential
product conforms to IEC60947-4-1 standard.



Operating conditions


  • The altitude couldn't exceed 2000m;
  • Ambient temperature:-5℃ ~+55℃ and the average temperature no more than +35℃ in 24 hours;
  • Atmosphere:Comparative humidity no more than 50% at max +40℃ , and it may be higher at a lower temperature. The lowest average temperature no more than+20℃ in the wettest month. The maximum average comparative humidity of this month couldn't exceed 90%,The change of temperature leading to dew on the product must be considered;
  • Class of pollution:Class 3;
  • The slope between installation surface and vertical surface couldn't exceed ±5°;
  • Keeping away from explosive, corrosive and electric atomy;
  • Keeping dry;
  • The product should be used and installed at certain place without any shock, vibration etc.





  • Three-phase thermal relays with release class 10A;
  • With differential phase-failure protection;
  • With continuous current adjusting scale;
  • With temperature compensation;
  • With ON/OFF indicator;
  • With TEST (OFF) button;
  • With stop button;
  • With Manual/Auto reset button;
  • With Auxiliary contacts 1NO+1NC insulated each other;
  • Mounting:plug in connection with contactor or install as a single unit.



Technical data