Westinghouse LA3400PR 400A 3P 600V Circuit Breaker | AmpState

The Westinghouse LA3400PR 400A 3P 600V Circuit Breaker is engineered for reliable overcurrent protection in panelboards, load centers, and distributed electrical systems. Designed for direct part-number matching, this model is a smart choice for maintenance teams, panel builders, and spare inventories where exact compatibility matters.

Key specifications

• Manufacturer: Westinghouse
• Part Number: LA3400PR
• Amperage: 400 A
• Poles: 3
• Voltage Rating: 600 V
• Applications: Circuit protection in panelboards, load centers, and electrical distribution networks

Why this breaker stands out

• Exact match for Westinghouse LA-series panels: The LA3400PR is designed to slot into existing Westinghouse configurations with minimal modification, reducing downtime during replacements or upgrades.
• Robust 3-phase protection: The 3-pole design supports balanced 3-phase systems, ensuring reliable protection across commercial and industrial environments.
• High-capacity protection: With a 400 A rating, it supports substantial load centers and distribution panels without compromising safety.
• 600 V versatility: Suitable for a wide range of commercial, manufacturing, and utility-style applications that require dependable circuit interruption at higher voltages.

Ideal use cases

• Replacing a blown or aging breaker in Westinghouse panelboards and load centers where a direct part-number match is essential
• Stocking spare inventory for maintenance teams to cut downtime during service calls
• Specifying for new installations in 3-phase, 600V distribution setups that demand robust, plug-and-play protection

Compatibility and installation notes

To ensure a seamless fit, verify that your panelboard or distribution panel is compatible with LA-series breakers and that the LA3400PR matches the required part number for your configuration. This unit is specifically selected for direct part-number compatibility with Westinghouse systems, helping you maintain consistent protection across your network.

AmpState availability and support

AmpState offers the Westinghouse LA3400PR in stock. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Practical tips for best results

• Before replacement, de-energize and lock out the circuit; follow all local electrical codes and safety procedures.
• Cross-check the panel’s label to confirm the LA3400PR is the correct model for your exact panelboard or load center.
• If you’re unsure about fit, rely on AmpState’s compatibility guidance to avoid mismatches and unnecessary downtime.