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Schneider Electric LR3D350 - Overload Relay 30-40A (Class 10A)

Schneider Electric
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The Schneider Electric LR3D350 is a thermal overload relay designed to protect motors from overload and phase failure conditions. It is rated for a voltage of up to 690 V AC and a current range of 30 to 40 A, ensuring reliable protection for moderate-sized motors. The device measures 2.8 in (70 mm) in height, 2.2 in (55 mm) in width, and 4.8 in (123 mm) in depth, with a weight of 0.888 lb, and features a compact, robust construction suitable for industrial environments. It complies with international standards such as IEC and UL, and is commonly used in applications like conveyors, pumps, and compressors within the LRD family of overload relays.

Key Features & Specifications
  • Type: Thermal overload relay, Class 10A, with manual/auto reset
  • Voltage Rating: 690 V AC
  • Current Rating: 30 to 40 A
  • Dimensions: 2.8 in (70 mm) x 2.2 in (55 mm) x 4.8 in (123 mm) (Height x Width x Depth)
  • Standards: IEC, UL, CSA
  • Applications: Motor protection for conveyors, pumps, compressors
  • Switch Type: Thermal bimetallic
  • Configuration: 3-pole
  • Coil Voltage Maximum: Not applicable (thermal relay)
  • Temp Rating: -20°C to 60°C
  • Shipping Dimensions: 3.0 in x 2.5 in x 5.0 in
  • Phase: 3-phase
  • Voltage: 690 V AC
  • Amperage: 30 to 40 A
  • AIC rating: 50 kA at 690 V
  • Connection: Screw terminals
  • Poles: 3
  • Protection: Overload and phase failure
  • Functions: Motor protection
  • Frame Size: LRD
  • Trip Type: Thermal
  • Panel Type: Open
  • Breaker Type: Not applicable
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Steel
  • Panel Style: Not applicable
  • Bus Type: Not applicable
  • Fuse Class: Not applicable
  • Insulation Temperature: 85°C
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Class 10A
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: DIN rail or screw
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Up to 20 HP at 460 V
  • Aux Contacts: 1 NO + 1 NC
  • CPT: Not applicable
  • Full Load Amps: 30 to 40 A
  • Dist Voltage: Not applicable
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 40 A
  • Full Load Amp Minimum: 30 A
  • Enclosure: Open type
  • Relay Style: Thermal overload
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper
  • Amperage Maximum: 40 A
  • Amperage Minimum: 30 A
  • Nema Rating: Not applicable
  • Switch Style: Thermal
  • Wire Size: 14 to 4 AWG
  • Certification: CE, UL, CSA
  • Circuit Breaker Mounting Style: Not applicable
  • Terminal Connection: Screw
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: IEC 60947-4-1
  • Compatible Frames: LC1D, LC1F
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not applicable
  • Current Rating: 30 to 40 A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 60°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 785901952589
  • GTIN: 00389119000000