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Schneider Electric LRN03N Easy TeSys Protect Thermal Overload Relay, 0.25–0.4 A, Class 10A

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Schneider Electric Easy TeSys Protect LRN03N is a differential thermal overload relay designed for reliable motor protection in AC networks. With an adjustable current range of 0.25 to 0.4 A and Class 10A tripping, it integrates seamlessly under EasyPact LC1N06…38 contactors and offers IP20 finger-safe protection. Built to IEC 60947-4-1 standards, it delivers robust performance across a −20 to 60 °C operating window.

  • Adjustable thermal protection: 0.25 – 0.4 A
  • Class 10A trip curve for motors
  • Phase-failure sensitive per IEC 60947-4-1
  • Mounts directly under LC1N06…38 contactors
  • Auxiliary contacts: 1 NO + 1 NC
  • IP20 enclosure, −20 to 60 °C operation
Product ID LRN03N
Brand Schneider Electric
Range Easy TeSys
Series / Product Line Easy TeSys Protect
Device Short Name LRN
Product Type Differential thermal overload relay
Application Motor protection
Thermal Protection Adjustment Range 0.25 – 0.4 A
Thermal Overload Class Class 10A
Phase-Failure Sensitivity 30 % Ir on one phase, others at Ir (IEC 60947-4-1)
Tripping Threshold 1.14 ± 0.06 Ir
Auxiliary Contacts 1 NO + 1 NC
Conventional Free-Air Thermal Current (Ith) 5 A (signalling circuit)
Rated Operational Voltage (Ue) ≤ 690 V AC
Rated Insulation Voltage (Ui) 690 V
Rated Impulse Withstand Voltage (Uimp) 6 kV
Network Type / Frequency AC, 50 – 60 Hz
Mounting Support Under contactor; plate or rail with accessories
Product Compatibility LC1N06…38
IP Rating IP20 (IEC 60529)
Operating Temperature −20 … 60 °C (no derating)
Storage Temperature −60 … 80 °C
Dimensions (H × W × D) 44.5 × 45 × 70 mm
Net Weight 0.124 kg
Standards IEC 60947-4-1, GB 14048
Certification CCC
Mechanical Robustness Shock 6 Gn / 11 ms; Vibration 3 Gn
Dielectric Strength 6 kV @ 50 Hz (IEC 60255-5)
Fire Resistance 850 °C (IEC 60068-2-1)
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