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Siemens JJ3B400 - Molded Case 400A 600V 3-Pole Breaker

Siemens
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Siemens JJ3B400 is a 3-pole molded case circuit breaker from the JJ Frame family, designed for thermal-magnetic protection with long-time and instantaneous (LI) trip functions. It is rated for 400A continuous current at 600VAC, 3-phase, with an interrupting capacity of 25kA at 480VAC. This bolt-on unit weighs 22 lb and features a compact molded case construction suitable for industrial panelboards and switchboards. It complies with UL and NEMA standards for overcurrent protection in commercial and industrial power distribution systems. Typical applications include feeder protection, motor control centers, and main disconnect service in manufacturing plants and data centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic, LI (Long-Time and Instantaneous) Trip
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Standard JJ Frame size
  • Standards: UL 489, NEMA AB-1
  • Applications: Feeder protection, motor control centers, main disconnect
  • Switch Type: Molded Case
  • Configuration: 3-Pole, 3-Phase
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Standard JJ frame packaging
  • Phase: 3
  • Voltage: 600V
  • Amperage: 400A
  • AIC rating: 25kA@480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: JJ
  • Trip Type: Thermal Magnetic
  • Panel Type: Industrial panelboards/switchboards
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Molded case
  • Panel Style: Bolt-on
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: 40°C
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 400A
  • Dist Voltage: 600V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 400A
  • Full Load Amp Minimum: 400A
  • Enclosure: Open (no enclosure)
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 400A
  • Amperage Minimum: 400A
  • Nema Rating: NEMA AB-1
  • Switch Style: Molded Case
  • Wire Size: Not specified
  • Certification: UL 489
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL 489, NEMA AB-1
  • Compatible Frames: JJ Frame
  • Installation Type: Panelboard/Switchboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: JJ
  • Current Rating: 400A
  • 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: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available