Square D | LHL36400 | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Square D LHL36400 Circuit Breaker — a robust, protective device designed for demanding electrical systems. With 400A capacity, 3-pole configuration, and a 600V rating, this breaker safeguards distribution panels and feeders in industrial, commercial, and large-scale applications.

Engineered for maintenance, retrofit, and replacement projects where exact specifications matter, the LHL36400 helps ensure continuity, safety, and compliance without unnecessary panel modifications.

Key specifications

• Amperage: 400 A
• Pole configuration: 3-Pole
• Voltage rating: 600 V

Compatibility and fit: Before ordering, confirm the part's compatibility with your equipment. The part number LHL36400 is the best reference for matching breakers to panels, bus bars, and accessories. This is essential to avoid mismatches in trip characteristics and mounting footprint.

Why choose the Square D LHL36400:

• Official Square D protection for high-load circuits — trusted performance under demanding conditions.
• Clear replacement path: same 3-pole, 600V design makes retrofits with legacy gear more straightforward.
• Availability as a dedicated spare part with precise specifications, reducing guesswork during maintenance.

Use cases and scenarios:

• Upgrading a heavy-load distribution panel in manufacturing or data-center environments requiring 400 A protection on three phases.
• Retrofit of older switchgear that uses a matching 3-pole, 600V protective device for improved safety margins.
• Spare-part readiness for facilities that standardize on Square D components to streamline maintenance and stock management.

Installation and safety tips:

• Coordinate with a qualified electrician to verify panel rating and compatibility with the LHL36400 before purchase.
• Keep the part number handy (LHL36400) when ordering to ensure you receive the exact spec you need.