Siemens HLD63B400L - 500 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HLD63B400L is a 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. With a robust bolt-on mounting, this unit delivers a rigid, vibration-resistant connection to the bus, helping maintain consistent protection even in installations with equipment start-ups or panel movement.

• Secure bolt-on mounting — provides a solid, vibration-resistant bus connection that stays tight over time.
• Thermal-magnetic trip unit — combines thermal overload protection with magnetic short-circuit interruption for stable, repeatable protection performance.
• 3-pole design, 500 A, 600 V — true three-phase protection suitable for high-demand feeders in residential, commercial, and light industrial settings.
• OEM-compatible — designed to pair with matching Siemens OEM loadcenters and panelboards, simplifying retrofits and new installations.
• Versatile application — protects branch circuits and downstream equipment, helping minimize downtime and equipment damage from fault currents.

Ideal for installations where reliable, long-term circuit protection is essential. Whether you're upgrading a panel, building out a distribution system in a small commercial space, or equipping a light industrial electrical room, the HLD63B400L delivers dependable performance compatible with Siemens systems.

Technical snapshot:

• Manufacturer: Siemens
• Part Number: HLD63B400L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 500 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection