Square D | LHL363501290 | Circuit Breaker | 350A | 3-Pole | 600V

Protect your three-phase power with precision using the Square D LHL363501290 Circuit Breaker. Designed for reliability in industrial panels, this 350A, 3-Pole device handles up to 600V to safeguard equipment and personnel during routine operation and unexpected faults. Ideal for maintenance, retrofit, and replacement projects where exact specifications matter, it’s a dependable choice when continuity is non-negotiable.

Key specifications at a glance

• Amperage: 350A
• Pole configuration: 3-Pole
• Voltage rating: 600V
• Part number: LHL363501290

Why this Square D breaker stands out

What sets this unit apart is its precise compatibility reference. The LHL363501290 part number acts as the clearest, most reliable indicator for matching your existing panel, bus arrangement, and protection scheme. This isn’t a generic drop-in switch — it’s a purpose-driven solution that aligns with Square D’s design standards, ensuring predictable performance and fit within compatible systems.

Fit, compatibility, and installation guidance

Before ordering, confirm fit and ratings for your specific panel or switchgear. The part number is the best reference for compatibility, so cross-check it against your panel catalog and any available schematics. Keep in mind this unit is intended for three-phase applications up to 600V and should be matched to the corresponding enclosure and bus assembly to maintain protective coordination.

Ideal use cases

• Routine maintenance on industrial control panels where a precise 350A, 3-pole, 600V protection device is required.
• Retrofit projects upgrading legacy protections to a modern, easily sourced replacement with identical electrical characteristics.
• Replacement of failed or not-in-spec breakers in existing Square D installations to restore proper interrupting and protection.

Practical tips for a smooth replacement

Plan for a safe, de-energized installation following standard electrical safety practices. Have the existing panel documentation on hand to verify mounting style and trip mechanism compatibility, and reference the LHL363501290 part number as your primary compatibility check. With the right match, you’ll restore protection quickly, minimize downtime, and maintain system reliability.