Square D PGL36100U43A 1000A 3P 600V Circuit Breaker | AmpState

Meet the Square D PGL36100U43A, a 1000-amp, 3-pole, 600-volt circuit breaker built for robust protection in demanding electrical distributions. Designed for panelboards, load centers, and distribution boards, this breaker is ideal for high‑demand feeders and hard-wired circuits in commercial and light industrial environments.

Why choose PGL36100U43A for retrofit or maintenance projects? The part number stays consistent, simplifying spares strategy and minimizing downtime when you need to substitute like-for-like replacements. AmpState keeps this exact Square D model in stock, ready to ship to keep your panel going without surprises.

Key features and benefits

• High current protection: 1000 A rating provides reliable interruption and protection for large circuits feeding critical equipment.
• Three-pole design: 3P configuration supports 3-phase systems, common in industrial and commercial power distribution.
• 600 V operation: Suitable for standard 600-volt distribution networks, with compatibility for typical panelboards and load centers.
• Exact fit for compatibility: Part number PGL36100U43A ensures seamless replacement in existing Square D installations.
• Retrofit-friendly: Simplifies maintenance planning by keeping the same part number across upgrades.
• Trusted brand: Square D (Schneider Electric) is a recognized standard in electrical protection, known for reliability and consistent performance.

The PGL36100U43A is commonly used to protect feeders and main circuits in panelboards and load centers, helping prevent wiring damage and downtime from overcurrent events. For maintenance planners and facilities engineers, this model offers predictability and ease of procurement—you know you’re getting the exact specification you need when you specify PGL36100U43A.

Practical use cases include data center rack power feeds, manufacturing line infeed breakers, and large HVAC or pumping systems where a 3-pole 600V breaker with a 1000 A interrupt capability is required. It’s particularly valuable in retrofit projects where legacy inventories need to stay consistent for future replacements, spares, or audited maintenance records.

Need help confirming compatibility with your panel? Message us and we’ll help you confirm fit.

Availability: AmpState is your source for genuine Square D PGL36100U43A breakers, with careful packing and fast shipping to minimize downtime.