Siemens SJ2D 400A 600V Circuit Breaker | AmpState

Siemens SJ2D 400A, 600V Circuit Breaker is built for everyday electrical work, delivering dependable circuit protection in panelboards, load centers, and electrical distribution systems. It’s the smart choice for maintenance teams, panel builders, and spare inventory where a direct part-number match matters.

Designed for straightforward field replacements and reliable performance, the SJ2D keeps critical electrical systems protected without upselling you to unnecessary options. When your operation relies on precise part-number compatibility, this Siemens breaker delivers consistency you can trust.

• Manufacturer: Siemens
• Part Number: SJ2D
• Product Type: Circuit Breaker
• Amperage: 400 A
• Voltage: 600 V
• Applications: Panelboards, Load centers, Electrical distribution

Why select the SJ2D for your project or service van

• Direct part-number match simplifies procurement and minimizes downtime by ensuring you’re stocking the exact model specified for your panels.
• Reliable Siemens design for steady protection across residential, commercial, and light industrial applications.
• Stock-ready for AmpState customers with convenient availability when you need a precise 400 A, 600 V solution.

Who benefits most

• Maintenance crews performing routine panel servicing or replacements in existing installations
• Panel builders and integrators configuring distribution systems that require an exact SJ2D part
• Electrical distributors and service fleets maintaining spare inventory with standardized components

Use cases and practical notes

• Replace a blown or failed breaker in Siemens panelboards or compatible distribution setups that specify SJ2D to restore protection quickly.
• Keep a ready-to-install 400 A, 600 V solution on service vehicles to reduce job site downtime and avoid delays waiting for approvals.
• Use in new builds or retrofits where a direct part-number match ensures compatibility with existing enclosure layouts and wiring schemes.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.