Square D | LHL36300-BLACK | Circuit Breaker | 300A | 3-Pole | 600V

The Square D LHL36300-BLACK circuit breaker is a rugged 300A, 3-pole device engineered for demanding electrical installations. Built with retrofit, maintenance, and replacement projects in mind, this breaker delivers dependable protection for three‑phase systems rated up to 600V.

Key specifications

• Amperage: 300A
• Poles: 3-Pole
• Voltage rating: 600V
• Part number: LHL36300-BLACK

Why this Square D breaker stands out

Designed to align with Square D panels and enclosures that accept the LHL36300-BLACK, this unit simplifies replacement by matching exact form factor and electrical ratings. It’s a reliable choice for protecting critical loads in 3‑phase, 600V installations, helping to minimize downtime during service or upgrades. The BLACK designation aids quick identification in panels with multiple breakers, reducing installation time and the chance of selecting the wrong unit.

Ideal use cases

• Maintenance and service upgrades for commercial and industrial panels that run on 3‑phase power
• Retrofits where a direct spec match is required for aging systems
• Replacement of a failed breaker in compatible Square D panelboards operating at up to 600V

What problems it solves

• Provides reliable overcurrent protection for 3‑phase loads up to 600V, helping prevent equipment damage and downtime.
• Offers a precise component match to existing installations, reducing compatibility risk and installation time.
• Supports streamlined maintenance workflows by using a standard part number that’s the best reference for compatibility.

Notes on compatibility

Important: Confirm fit and ratings before ordering. The part number LHL36300-BLACK is the best reference for ensuring this breaker matches your panel or enclosure’s requirements.