Siemens | JD63M400 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

Siemens JD63M400 Circuit Breaker delivers robust, three-pole protection for demanding electrical systems. With a 400A rating and a 600V operating capability, this bolt-on unit is purpose-built for maintenance, retrofit, and replacement projects where precise spec matching matters.

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Mounting: Bolt-On
• Part Number: JD63M400
• Applications: Maintenance, retrofit, and replacement in compatible Siemens panels

Why this Siemens JD63M400 is the right choice

This 3-pole, 600V bolt-on circuit breaker is designed to integrate smoothly with Siemens protection systems, providing reliable interruption protection for high-current feeders. The bolt-on design offers a secure mechanical fit and straightforward installation, making it a practical choice for service crews working on retrofit and replacement tasks.

Ideal use cases

• Retrofit projects upgrading panel protection to 400A capacity
• Maintenance scenarios where a precise JD63M400 replacement is required
• Replacement in large commercial or industrial distribution panels that demand 3-pole, 400A protection

Compatibility and installation notes

Note: Confirm fit and ratings before ordering. The JD63M400 part number serves as the best reference to ensure compatibility with your Siemens equipment and panel configuration.

Practical tips for optimal results

• Verify the panel’s voltage rating (600V) and bus configuration to ensure a proper match with a 3-pole bolt-on unit.
• Keep a spare JD63M400 on hand for proactive maintenance and faster replacements.
• During installation, follow manufacturer torque specifications for mounting bolts to ensure secure operation.

Equip your service toolkit with the Siemens JD63M400 to protect high-current circuits with confidence. Ready for retrofit, maintenance, or replacement—this 400A, 3-pole, 600V bolt-on breaker is built to keep critical systems safely online.