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Square D MAP26400 - Molded Case 400A 2-Pole Thermal Magnetic

Square D
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Square D MAP26400 Circuit Breaker - Molded Case 400A 2-Pole Thermal Magnetic The Square D MAP26400 is a 2-pole molded case circuit breaker from the MAP Series, designed to provide LI (Long-Time and Instantaneous) protection for electrical systems. This unit is rated for 600V AC, 400A continuous current, and offers an interrupting capacity of 30kA at 480V, making it suitable for high-fault industrial environments. Constructed with a bolt-on connection and an M Frame size, the breaker weighs 35 lb and features a thermal magnetic trip mechanism for reliable overcurrent protection. It complies with industry standards for molded case circuit breakers, ensuring safe operation in commercial and light industrial power distribution panels. Typical applications include feeder protection in switchboards, panelboards, and motor control centers where robust, single-phase fault interruption is required.

Key Features & Specifications
  • Type: Molded Case, MAP Series, Thermal Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: M Frame size
  • Standards: UL 489, CSA C22.2 No. 5
  • Applications: Feeder protection in switchboards, panelboards, motor control centers
  • Switch Type: Circuit Breaker
  • Configuration: 2-Pole
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 6.0 x 4.0 x 3.0 in
  • Phase: 1
  • Voltage: 600V
  • Amperage: 400A
  • AIC rating: 30kA@480V
  • Connection: Bolt-On
  • Poles: 2
  • Protection: LI - Long-Time and Instantaneous
  • Functions: Overcurrent protection
  • Frame Size: M Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Distribution panel
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: 250-500 kcmil
  • Metal Type: Copper alloy
  • Panel Style: Industrial
  • Bus Type: Aluminum or copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: 2
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: 2.5 in
  • Clas: Not applicable
  • Mounting: Bolt-on
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: 100 HP @ 480V
  • Aux Contacts: Optional
  • CPT: Not included
  • Full Load Amps: 400A
  • Dist Voltage: 480V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 400A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper or aluminum
  • Amperage Maximum: 400A
  • Amperage Minimum: 0A
  • Nema Rating: 1
  • Switch Style: Toggle
  • Wire Size: 250-500 kcmil
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single
  • Standards: UL 489, CSA C22.2 No. 5
  • Compatible Frames: M Frame
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: M Frame
  • 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: 785901234567
  • GTIN: 00785901234567