Square D | LHL3640030DC | Circuit Breaker | 3-Pole

Square D's LHL3640030DC 3-pole circuit breaker is engineered for dependable protection in maintenance, retrofit, and replacement projects where exact specifications matter. This 3‑pole (3P) unit is designed to provide robust, reliable disconnect and fault protection for three‑phase electrical systems, ensuring coordinated shutoff across all three legs when faults occur.

Key benefits

• Three-pole protection (3P)—consistent, simultaneous disconnection for all phases in 3‑phase circuits.
• Definitive compatibility reference—the part number LHL3640030DC is the best guide for fit and replacement scenarios.
• Perfect for maintenance, retrofit, and replacement—solves scenarios where matching specs and reliable protection are required.
• Consistent installation and operation—engineered to align with standard Square D panels and mounting practices, helping reduce installation time and misfits.
• Durable, industrial-grade design—built to withstand demanding environments while delivering dependable protection.

Ideal use cases

• Replacing a failed or outdated breaker in existing Square D panels with a precise 3P match.
• Retrofit projects that convert or upgrade three‑phase distribution to ensure proper three‑line protection.
• Maintenance inventories where technicians stock a trusted, widely-compatible part number for quick field replacements.

How to ensure you get the right fit

Before ordering, verify the panel’s requirements align with LHL3640030DC. The part number is the most reliable reference for compatibility, and confirming fit and ratings helps prevent downtime and mismatches in critical electrical systems.

In environments where three-phase protection matters, this Square D circuit breaker delivers clarity of fit, precise performance, and peace of mind. If your project demands a trusted 3-pole unit with a clear compatibility reference, the LHL3640030DC is the practical, deliberate choice for reliable electrical protection.