Westinghouse | LA3400F | Circuit Breaker | 400A | 3-Pole | 600V | 30kA | Bolt-On

Meet the Westinghouse LA3400F bolt-on circuit breaker—a rugged, reliable solution for demanding 3‑phase, 600 V environments. Designed for maintenance, retrofit, and replacement, this 400 A, 3‑pole unit delivers robust overcurrent protection where uptime matters and panel compatibility is non‑negotiable.

• Amperage: 400 A
• Pole configuration: 3‑Pole
• Voltage rating: 600 V
• Interrupting rating: 30 kA
• Mounting: Bolt‑On

Why this Westinghouse LA3400F stands out

What sets this breaker apart is its purposeful design for field retrofit and dependable protection in real-world systems. The bolt‑on mounting simplifies installation and future service, minimizing downtime during replacements or upgrades. With a 30 kA interrupting rating, it provides solid protection against high fault currents in industrial or commercial power distributions, while the 3‑pole configuration ensures synchronized disconnection of all three phases for balanced, safe operation.

Ideal use cases

• Main or feeder protection in 3‑phase commercial and industrial panels
• Retrofit projects where existing equipment requires a like‑for‑like 400 A, 3‑pole 600 V solution
• Replacement of aging breakers in maintenance workflows, minimizing compatibility risks with Westinghouse panels

How it solves real-world problems

The LA3400F is purpose-built for reliability and ease of service. Its bolt‑on design speeds on‑site installation and future maintenance, reducing labor time and panel downtime. The 400 A rating supports substantial load demands, while the 30 kA interrupting rating helps ensure rapid isolation of fault currents, protecting downstream equipment and enhancing overall system safety. This breaker is ideal for facilities that require a true, field‑proven 3‑phase protection solution without chasing aftermarket compatibility issues.

Key considerations and ordering tips

Before ordering, verify fit and ratings for your specific panel configuration. The line‑item LA3400F is the best reference to confirm compatibility with matching Westinghouse panels and retrofit kits. Look for a precise match to maintain electrical performance, compliance, and warranty coverage.

Specification snapshot

Westinghouse • LA3400F • Circuit Breaker • 400 A • 3‑Pole • 600 V • 30 kA • Bolt-On