Square D | LHB36125 | Circuit Breaker | 125A | 3-Pole | 600V

Protect and power your electrical distribution with the Square D LHB36125 circuit breaker—a dependable 125A, 3-pole unit designed for reliable fault protection in practical, real-world applications. With a 600V rating, this breaker is built to handle demanding commercial and light industrial environments where consistent performance matters.

Key specifications

• Amperage: 125A
• Poles: 3-Pole
• Voltage rating: 600V

Why this Square D breaker stands out

• Exact compatibility: The part number LHB36125 is your best reference for matching fit and ratings, making it ideal for maintenance, retrofit, or replacement when the panel requires Square D protection.
• Three-phase protection: A 3-pole design delivers balanced protection across three-phase systems, supporting motors, MCCs, and other multi-phase equipment.
• High-voltage readiness: With a 600V maximum, it accommodates typical commercial distribution demands while maintaining clear, predictable trip performance.
• Durable, dependable operation: Built to endure regular switching and fault events, helping maintain panel reliability over time.

Ideal use cases

• Retrofit projects where existing panels require the LHB36125 part for continued protection and compatibility.
• Replacement in service panels to restore proper overcurrent protection without changing the panel architecture.
• New installations that specify a 125A, 3-pole, 600V Square D breaker for aligned protection coordination.

Important ordering notes

Before ordering, confirm fit and ratings against your panel labeling. The part number is the most reliable reference for compatibility, helping you avoid mismatches that could impact protection or warranty considerations.

Practical installation and coordination tips

• Verify your system is a three-phase configuration and that the panel accepts a 125A, 3-pole breaker of the appropriate line up.
• Check the panel’s documentation for trip curves and coordination with neighboring breakers to maintain effective protection without nuisance trips.
• Keep a spare LHB36125 on hand for scheduled maintenance or rapid replacement to minimize downtime.

If you’re upgrading or maintaining a Square D distribution system, the LHB36125 provides a precise, reliable solution that aligns with your existing protection scheme and panel hardware. Ensure you follow local electrical codes and work with a licensed electrician for safe, compliant installation.