Siemens | HHLD63B400 | Circuit Breaker | 400A | 3-Pole | 600V

Siemens HHLD63B400 circuit breaker delivers robust, reliable protection for three-phase electrical systems. With a 400A current rating, a 3-pole configuration, and a 600V maximum voltage, it’s built to handle demanding industrial environments where precise specifications matter.

Designed for maintenance, retrofit, and replacement projects, this Siemens breaker helps ensure your panel, feeders, and distribution network stay aligned with your system’s true ratings. The part number HHLD63B400 is your best reference for compatibility—always verify fit and ratings before ordering.

Key specifications

• Amperage: 400A
• Poles: 3-Pole (three-phase protection)
• Voltage: 600V
• Part number: HHLD63B400

Why this Siemens breaker stands out

• Precise compatibility: Rely on the official part number (HHLD63B400) to match your panel catalog and existing wiring configuration.
• Industrial-grade durability: Built to endure continuous operation in demanding environments common to commercial and light-industrial facilities.
• Streamlined maintenance and retrofits: A standard Siemens footprint helps simplify upgrades, replacements, and inventory management.
• Enhanced protection for 3-phase systems: The 3-pole design is ideal for distributing balanced protection across three live conductors.

Ideal use cases

• Maintenance and servicing of aging or out-of-spec panels that require a like-for-like 400A, 3-pole, 600V breaker.
• Retrofit projects to upgrade capacity or restore performance in industrial electrical feeders.
• Replacement scenarios where the existing equipment matches the HHLD63B400 specifications and footprint.

Buying tips and compatibility reminders

Before purchasing, confirm the fit and ratings against your current equipment. Use the HHLD63B400 part number as the primary compatibility reference, and cross-check with your panel’s catalog or service documentation. Ensure the system voltage, current rating, and three-pole configuration align with your installation to maintain safety and performance.

In short, the Siemens HHLD63B400 is purpose-built for reliable, upgrade-friendly protection in 3-phase 600V environments, offering a precise, compatible solution for maintenance, retrofit, and replacement needs.