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Siemens P1742MC400CT - 400A 3-Pole Molded Case Circuit Breaker

Siemens
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The Siemens P1742MC400CT is a 400-amp, 3-pole molded case circuit breaker designed for primary overcurrent and short-circuit protection in industrial power distribution systems. It operates at a voltage rating of 600V AC and a current rating of 400A, featuring a thermal-magnetic trip mechanism for reliable coordination. This unit weighs 68 lb and is constructed with a compact frame for panelboard mounting, utilizing copper bus connections. It complies with UL 489 and NEMA AB-1 standards, ensuring robust performance in demanding environments. Typical applications include main breaker service entrance panels, feeder protection in manufacturing plants, and heavy machinery power distribution.

Key Features & Specifications
  • Type: Molded case circuit breaker, thermal-magnetic trip
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Compact frame size for panelboard mounting
  • Standards: UL 489, NEMA AB-1
  • Applications: Main breaker service entrance, feeder protection, industrial machinery
  • Switch Type: Molded case
  • Configuration: 3-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Standard industrial packaging
  • Phase: 3-phase
  • Voltage: 600V AC
  • Amperage: 400A
  • AIC rating: 65kA at 240V AC
  • Connection: Copper bus
  • Poles: 3
  • Protection: Overcurrent and short-circuit
  • Functions: Thermal-magnetic trip
  • Frame Size: P1
  • Trip Type: Thermal-magnetic
  • Panel Type: Panelboard
  • Breaker Type: Molded case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: 500 MCM max
  • Metal Type: Copper
  • Panel Style: Industrial
  • Bus Type: Copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • 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: Panelboard
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: 200 HP at 480V
  • Aux Contacts: Optional
  • 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: 400A
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper
  • Amperage Maximum: 400A
  • Amperage Minimum: 400A
  • Nema Rating: 1
  • Switch Style: Molded case
  • Wire Size: 500 MCM max
  • Certification: UL
  • Circuit Breaker Mounting Style: Panelboard
  • Terminal Connection: Copper bus
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, NEMA AB-1
  • Compatible Frames: P1
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: P1
  • 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: 887621662530
  • GTIN: 0887621662530