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Siemens WML23400RJ - Molded Case Breaker 400A 600V

Siemens
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Siemens WML23400RJ Circuit Breaker is a high-capacity molded case circuit breaker designed for primary overcurrent and short-circuit protection in industrial power distribution systems. It is rated for 600V AC with a continuous current capacity of 400A, providing robust fault interruption with a high AIC rating suitable for heavy-duty applications. The unit features a three-pole configuration, a thermal-magnetic trip mechanism, and a compact frame size with line and load side lug connections, constructed with durable metal components for reliable performance in demanding environments. This breaker complies with UL 489 and CSA standards, ensuring safe operation within its specified insulation temperature and frequency ratings. Typical applications include main feeder protection in manufacturing plants, commercial buildings, and large-scale electrical panels requiring dependable circuit isolation and overload protection.

Key Features & Specifications
  • Type: Molded case circuit breaker, thermal-magnetic trip, three-pole
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Standard molded case frame size
  • Standards: UL 489, CSA certified
  • Applications: Industrial power distribution, main feeder protection, commercial panels
  • Switch Type: Thermal-magnetic
  • Configuration: Three-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: Standard 40°C ambient
  • Shipping Dimensions: Standard industrial packaging
  • Phase: Three-phase
  • Voltage: 600V AC
  • Amperage: 400A
  • AIC rating: High (specific value per UL listing)
  • Connection: Line and load side lugs
  • Poles: 3
  • Protection: Overcurrent and short-circuit
  • Functions: Circuit isolation, overload protection
  • Frame Size: Standard molded case
  • Trip Type: Thermal-magnetic
  • Panel Type: Industrial distribution panel
  • Breaker Type: Molded case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Suitable for 400A conductor
  • Metal Type: Steel and copper alloy
  • Panel Style: Standard industrial
  • Bus Type: Copper
  • Fuse Class: Not applicable (breaker)
  • Insulation Temperature: 105°C (typical)
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Panel mount
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 400A
  • Dist Voltage: 600V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 400A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open (no enclosure)
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper or aluminum
  • Amperage Maximum: 400A
  • Amperage Minimum: 0A
  • Nema Rating: Not specified
  • Switch Style: Thermal-magnetic
  • Wire Size: Suitable for 400A conductor
  • Certification: UL 489, CSA
  • Circuit Breaker Mounting Style: Panel mount
  • Terminal Connection: Lug type
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Three-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: Siemens molded case frames
  • Installation Type: Fixed mount
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Standard molded case
  • Current Rating: 400A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • 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: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 04089217073
  • GTIN: 00040892170733