Siemens HJXD63B400 400A 3P 600V Circuit Breaker, Bolt-On | AmpState

Meet the Siemens HJXD63B400 bolt-on circuit breaker—a robust 400 A, 3‑pole protection solution designed for panelboards, load centers, and comprehensive electrical distribution. This unit is a precise direct-part-number match for Siemens systems, making it a smart choice for maintenance teams, panel builders, and spare inventories where compatibility matters.

• Manufacturer: Siemens
• Part Number: HJXD63B400
• Product Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Mounting: Bolt-On
• Applications: Panelboards, Load Centers, Electrical Distribution
• Availability: Available from AmpState

Why this Siemens breaker stands out

Its bolt-on design simplifies field service, enabling technicians to replace or upgrade the breaker with minimal tools and downtime. The 3‑pole configuration supports balanced three-phase distribution, which is essential for larger panel configurations and three-phase equipment. With a 600 V rating, this breaker is suitable for a wide range of industrial and commercial electrical setups while delivering dependable overcurrent protection.

What differentiates the HJXD63B400 is its calibrated fit for Siemens panel systems, ensuring consistent trip characteristics and protection coordination. This isn’t a generic substitute—it’s a purpose-built component that maintains the integrity of your existing electrical distribution.

Use cases and ideal scenarios

- Routine maintenance and part replacement in panelboards and load centers where a direct-part-number match speeds service.

- Spare inventory for electrical contractors and panel builders working with Siemens installations, ensuring reliable, on-demand replacements.

- Expansions or upgrades of 3-phase circuits that require a 400 A, 600 V protection device.

Fit confirmation and support

If you need help confirming compatibility with a specific panel or bus arrangement, AmpState offers guidance to verify fit. Reference Part Number HJXD63B400 to secure the correct match for your Siemens installations.

Ready to protect your high-current circuits with trusted Siemens accuracy? Add the Siemens HJXD63B400 3P 600V Bolt-On Circuit Breaker from AmpState to your cart and keep your electrical distribution performing at its best.