Square D PXF36900 900A 3P MCCB – Bolt-On Mount – LSI Trip Unit – 600V

Product Overview

The Square D PXF36900 is a high-capacity molded case circuit breaker (MCCB) engineered for industrial and commercial power distribution systems requiring dependable protection and interruption performance. It features a 900 Amp electronic non-interchangeable trip unit with LSI protection functions, providing long-time, short-time, and instantaneous fault protection. Built on the rugged PXF frame platform, this breaker is designed to operate reliably under demanding load conditions and high fault current environments. Its 3-pole configuration and bolt-on mounting design ensure secure installation in switchgear and electrical distribution assemblies.

Product Specification

• Manufacturer: Square D
• Model: PXF36900
• Frame Type: PXF
• Breaker Type: Molded Case Circuit Breaker (MCCB)
• Amperage: 900A
• Poles: 3 Pole
• Mounting Type: Bolt-On (Panel Mount)
• Trip Unit: Electronic Non-interchangeable
• Trip Functions: LSI (Long-time, Short-time, Instantaneous)
• Sensor Size: 1200 Amp
• Rating Plug: ARP075 Installed (Standard)
• Terminals: Without Terminals (Standard)
• Warranty: 1 Year In-house Warranty

Technical Specification

• Interrupting Capacity:
  • 125 kA @ 240 VAC
  • 100 kA @ 480 VAC
  • 65 kA @ 600 VAC
• Protection System: Microprocessor-based electronic LSI trip unit
• Frame Construction: Heavy-duty PXF industrial-grade frame
• Application Type: Industrial feeders, distribution panels, and high-load electrical systems
• Operational Reliability: Designed for demanding high fault-current applications

Voltage and Ratings

• Maximum Voltage Rating: 600V AC
• Operating Voltage Ratings:
  • 240 VAC – 125 kA interrupting capacity
  • 480 VAC – 100 kA interrupting capacity
  • 600 VAC – 65 kA interrupting capacity
• Rated Current: 900A at 40°C ambient temperature
• Frequency: 50/60 Hz systems

Product Data

• Frame Series: PXF Series
• Sensor Rating: 1200 Amp
• Pole Configuration: 3 Pole
• Connection Type: Bolt-On
• Trip Technology: Electronic LSI protection system
• Rating Plug: ARP075 included (standard configuration)
• Terminal Configuration: No terminals supplied (standard)
• Application: Industrial power distribution systems, feeders, and commercial electrical infrastructure
• Installation Flexibility: Accessories can be installed prior to shipment upon request

Important Note

This product image represents a base model and is for identification purposes only. Accessories can be installed at no additional cost when ordered together; customers should specify configuration requirements during checkout. The breaker includes a 1-year in-house warranty covering repair, parts, and labor under normal operating conditions. Damage caused by misuse, improper installation, or normal wear is not covered under warranty.