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Square D RLF36120U31A - Molded Case Circuit Breaker 1200A 600V

Square D
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The Square D RLF36120U31A is a 1200A molded case circuit breaker designed for primary overcurrent protection in industrial power distribution systems. This three-pole unit operates at 600VAC with a 100kA interrupting capacity at 480VAC, utilizing a MicroLogic 3.0 electronic trip unit providing Long-Time and Instantaneous (LI) protection functions. The breaker measures 16.24 in (412.50 mm) in height, 16.54 in (420.12 mm) in width, and 14.49 in (368.05 mm) in depth, weighing 88.185 lb, and features a bolt-on connection with AL2500RK terminal lugs accepting AWG 3/0 to 750 kcmil aluminum or copper conductors. It complies with UL, CSA, NEMA, NMX J-266, and IEC 60947-2 standards, with UL, CSA, and NOM certifications. This RLF series breaker is suited for main or feeder protection in switchboards, panelboards, and motor control centers within commercial and industrial facilities.

Key Features & Specifications
  • Type: RLF Molded Case Circuit Breaker with MicroLogic 3.0 electronic trip unit
  • Voltage Rating: 600VAC
  • Current Rating: 1200A (80% continuous)
  • Dimensions: 16.24 in (412.50 mm) x 16.54 in (420.12 mm) x 14.49 in (368.05 mm) (H x W x D)
  • Standards: UL, CSA, NEMA, NMX J-266, IEC 60947-2
  • Applications: Main or feeder protection in switchboards, panelboards, motor control centers
  • Switch Type: Molded case
  • Configuration: Three-pole
  • Coil Voltage Maximum: Not applicable (electronic trip)
  • Temp Rating: Not specified
  • Shipping Dimensions: 16.24 in x 16.54 in x 14.49 in
  • Phase: 3
  • Voltage: 600V
  • Amperage: 1200A
  • AIC rating: 100kA@480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Long-Time and Instantaneous (LI)
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: 1200
  • Trip Type: MicroLogic 3.0
  • Panel Type: Not specified
  • Breaker Type: RLF
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: 750 kcmil maximum
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • 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: 1200A
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: 1200A
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: AWG 3/0 to 750 kcmil
  • Amperage Maximum: 1200A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Molded case
  • Wire Size: AWG 3/0...750 kcmil aluminium/copper
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: AL2500RK
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL, CSA, NEMA, NMX J-266, IEC 60947-2
  • Compatible Frames: 1200A frame
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 1200
  • Current Rating: 1200A
  • 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: Not specified
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


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