Square D PJL36120U44 A - 1200 A, 600 V, 3-Pole Circuit Breaker | AmpState

Square D PJL36120U44A is a heavy-duty molded case circuit breaker engineered for demanding panel environments. With a 1200 A rating and a 600 V capacity, this 3-pole unit delivers reliable branch circuit protection for high-current feeders in panelboards and load centers.

Key design elements that differentiate this breaker include a compact molded-case form factor and a thermal-magnetic trip unit. The compact footprint helps maximize usable space inside crowded panels, while the thermal-magnetic mechanism provides stable, repeatable protection—responding accurately to both gradual overloads and sudden short-circuit events.

• High-current capability: 1200 A rating suited for heavy feeder protection in commercial and light industrial settings.
• Three-pole protection: Ensures all three phases trip together, preserving balance and safety in 3-phase systems.
• 600 V rating: Compatible with common commercial and industrial power distributions up to 600 V.
• Compact footprint: Maximizes panel space without compromising protection or performance.
• Thermal-magnetic trip: Delivers stable protection with predictable trip characteristics under both overload and fault conditions.
• OEM-compatible: Designed to work with matching OEM loadcenters and panelboards for seamless integration.
• Diverse application range: Suitable for residential, commercial, and light industrial applications where reliable high-current protection is essential.

This breaker is ideal for upgrading or replacing an existing high-current protection device in large panelboards, feeding substantial feeders to subpanels, or safeguarding equipment in commercial spaces. Its compatibility with Square D OEM panels helps ensure correct fit and performance, reducing installation hassles and protecting electrical systems with confidence.

Technical specifications

• Manufacturer: Square D
• Part Number: PJL36120U44A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 1200 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection