Square D | PXF36900LSZ | Circuit Breaker | 900A | 3-Pole | 600V

Meet the Square D PXF36900LSZ Circuit Breaker — a purpose-built solution for high-demand electrical systems. Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this unit delivers reliable protection at 900A with three poles and a 600V rating.

Key specifications

• Amperage: 900 A
• Poles: 3-Pole
• Voltage: 600 V
• Part number: PXF36900LSZ
• Intended use: Maintenance, retrofit, and replacement when matching specs are required

Why this matters

In high-current distribution, having a breaker that exactly matches the original specifications helps ensure stable protection, predictable trip characteristics, and streamlined maintenance. The PXF36900LSZ is positioned for scenarios where a single, definitive part number guides compatibility, making ordering simpler and reducing the risk of mismatched components.

Best use cases

• Retrofit and upgrade projects where a 900A, 3-Pole, 600V breaker is required
• Maintenance of older systems that rely on a specific Square D PXF-series unit
• Replacement while preserving original panel protection strategy and phase configuration

How to verify compatibility

Before ordering, confirm fit and ratings using the part number as your primary reference. The PXF36900LSZ is the best reference for compatibility, so cross-check this exact model against your panel’s labeling and original specifications to prevent mismatches.

Installation and safety notes

Handle with care, ensure power is isolated, and follow your organization’s electrical safety procedures. If you’re replacing an existing unit, reuse the same mounting arrangement and verify that the wiring connections align with the three-pole configuration and 600V rating.