Siemens | HHLD63B400L | Circuit Breaker | 400A | 3-Pole | 600V

Siemens HHLD63B400L circuit breaker delivers rugged, high-capacity protection for demanding electrical installations. With a 400A rating and three poles for balanced three-phase protection, this unit is designed for 600V systems, making it a solid fit for service panels, switchgear, and industrial feeders where reliable interruption protection is essential.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Part number: HHLD63B400L

Why choose the HHLD63B400L

• Designed for maintenance, retrofit, and replacement tasks where exact specifications matter — this is the precise part you need to preserve system performance.
• Three-pole configuration ensures balanced protection across all three phases, reducing the risk of uneven load and potential equipment damage.
• Compatibility guidance centers on the part number; use HHLD63B400L as the primary reference to confirm fit with existing Siemens equipment.
• Operates in 600V systems, supporting industrial and commercial electrical distributions with reliable interrupting capacity.

Common use cases

• Replacement in service panels and distribution boards where Siemens equipment is specified
• Retrofit upgrades to restore or upgrade protection in aging electrical infrastructure
• New installs requiring proven Siemens protection with a 400A, 3-pole, 600V rating

Practical notes

• Always confirm fit and ratings before ordering. The part number is the most reliable reference for compatibility with your equipment.
• Follow proper torque and installation procedures per your electrical codes and Siemens guidelines.