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Schneider Electric LRD3357 - Thermal Overload Relay 37-50A

Schneider Electric
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Schneider Electric LRD3357 is a thermal overload relay designed for protecting three-phase AC motors from overcurrent conditions. It operates with a voltage rating of 600/690V AC and provides adjustable current protection within a range of 37 to 50 amps. The relay is constructed within a compact housing measuring 81 mm H x 70 mm W x 115 mm D and weighs 1.085 lb, built for reliable performance in ambient temperatures from -20 to 60 °C. It complies with major international standards including EN/IEC, UL, CSA, and ATEX, making it suitable for demanding industrial applications such as motor control centers, pumps, fans, and conveyor systems.

Key Features & Specifications
  • Type: Thermal overload relay, TeSys D family, with 1NO/1NC auxiliary contacts
  • Voltage Rating: 600/690V AC
  • Current Rating: Adjustable, 37 - 50 A
  • Dimensions: 81 mm H x 70 mm W x 115 mm D (3.2 in x 2.8 in x 4.5 in)
  • Standards: EN/IEC, UL, CSA, GB/T, CCC, EAC, BV, RINA, DNV-GL, LROS, ATEX INERIS, UKCA
  • Applications: Motor protection for pumps, fans, conveyors, and industrial machinery
  • Relay Style: Thermal
  • Poles: 3
  • Phase: 3
  • Aux Contacts: 1NO/1NC
  • Temp Rating: -20 to 60 °C (28 to 158 °F)
  • Weight: 1.085 lb
  • Country of Origin: France


Product Identification
  • UPC: 785901519959
  • GTIN: 03389110519952