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Square D EZM313125CUX - 125A 3-Pole Molded Case Circuit Breaker (600V AC)

Square D
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Square D EZM313125CUX is a 125-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 features a 25kA interrupting capacity at 480V AC, with a thermal-magnetic trip mechanism for reliable overload and fault response. The unit weighs 5.19 lb and is constructed with a compact frame for panelboard mounting, utilizing a bolt-on connection style. This breaker complies with UL 489 and CSA standards, ensuring robust performance in demanding environments. It is commonly applied in commercial and industrial settings for feeder and branch circuit protection in switchboards and load centers.

Key Features & Specifications
  • Type: Molded case circuit breaker, thermal-magnetic trip
  • Voltage Rating: 600V AC
  • Current Rating: 125A
  • Dimensions: Compact frame size
  • Standards: UL 489, CSA
  • Applications: Feeder and branch circuit protection in industrial power distribution
  • Switch Type: Toggle
  • Configuration: 3-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: 3-phase
  • Voltage: 600V AC
  • Amperage: 125A
  • AIC rating: 25kA at 480V AC
  • Connection: Bolt-on
  • Poles: 3
  • Protection: Overcurrent and short-circuit
  • Functions: Circuit isolation and protection
  • Frame Size: EZM
  • Trip Type: Thermal-magnetic
  • Panel Type: Load center/panelboard
  • Breaker Type: Molded case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Steel enclosure
  • Panel Style: Industrial
  • Bus Type: Copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 75°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: Panelboard
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: Not specified
  • Dist Voltage: Not applicable
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not applicable
  • Full Load Amp Minimum: Not applicable
  • Enclosure: Open style
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not applicable
  • Amperage Maximum: 125A
  • Amperage Minimum: Not applicable
  • Nema Rating: 1
  • Switch Style: Toggle
  • Wire Size: #14 to #2 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: EZM series
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: EZM
  • Current Rating: 125A
  • 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