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LRD08C

The Schneider Electric LRD08C is a differential thermal overload relay from the TeSys D series . It is designed to provide reliable motor protection against overload, phase failure, and phase imbalance for three-phase AC motors

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Technical Parameters Parameter Value / Range Product Series TeSys D / TeSys Deca Model LRD08C Product Type Differential thermal overload relay Protection Functions Overload, Phase Failure, Phase Unbalance Thermal Protection Adjustment Range 2.5 ~ 4 A FLC Motor Rating 2.5 → 4 A Overload Tripping Class Class 10A (conforming to IEC 60947-4-1) Compatible Contactors LC1D09...LC1D38 Auxiliary Contacts 1 NO + 1 NC Rated Operational Voltage (Ue) 1000 V AC 50/60 Hz (power circuit) Rated Insulation Voltage (Ui) 1000 V AC (IEC), 600 V AC (UL/CSA) Rated Impulse Withstand Voltage (Uimp) 6 kV Conventional Free Air Thermal Current (Ith) 5 A (control circuit) Phase Failure Trip Threshold Two phases at 1.3 Ir, other phase at 0 (conforming to IEC 60947-4-1) Tripping Threshold 1.14 ± 0.06 Ir (conforming to IEC 60947-4-1) Reset Methods Manual reset / Automatic reset Mounting Support Under contactor or independent DIN rail Connection Terminals Screw clamp terminals Wire Gauge (Control Circuit) 1 ~ 2.5 mm² flexible with/without cable end Wire Gauge (Power Circuit) 1 ~ 6 mm² solid, 1.5 ~ 10 mm² flexible Tightening Torque 1.7 N.m (control circuit) Operating Temperature -20°C to +60°C Storage Temperature -30°C to +80°C Network Frequency ≤ 400 Hz Dimensions (W x H x D) 45 mm x 80 mm x 66 mm Net Weight Approx. 0.145 kg Degree of Protection IP20 (enclosure) Standards and Certifications IEC 60947-4-1, UL, CSA, CCC