ABB | S3B-3P-225A-DC | Circuit Breaker | 225A | 3-Pole | 240V

Protect critical 3-phase 240V DC systems with precision using the ABB S3B-3P-225A-DC circuit breaker. This 3-pole device is engineered to deliver reliable, coordinated protection in maintenance, retrofit, and replacement projects where exact specifications matter. The DC variant, identified by the part number S3B-3P-225A-DC, ensures your panel continues to operate with compatible protection characteristics and timing behavior.

Key specifications that matter in the field

• Amperage: 225A
• Poles: 3-Pole
• Voltage: 240V
• Configuration: S3B family, DC variant (part number reference S3B-3P-225A-DC)

Why this matters: matching the exact part number ensures compatibility with existing S3B installations and prevents mismatches that can lead to improper protection or unnecessary downtime. This unit is purpose-built for scenarios where a precise 3-pole, 225A, 240V solution is required, offering a straightforward, reliable replacement path for aging or incompatible breakers.

Ideal use cases

• Maintenance and service where a direct replacement is needed for a 3-phase 240V circuit.
• Retrofit projects to upgrade or standardize protection across ABB S3B-based panels and distribution boards.
• Replacement of worn or failed breakers in industrial equipment that operates on 3-phase 240V DC systems.

What problems it solves

• Eliminates guesswork by offering a precise 225A, 3-pole, 240V solution aligned with the S3B series.
• Minimizes downtime by providing a clear, compatible option for restoring protective functionality in critical electrical panels.
• Helps maintain system safety and reliability by using a proven ABB design that technicians recognize and trust.

Important compatibility note

Before ordering, confirm fit and ratings for your specific installation. The part number S3B-3P-225A-DC is the best reference for compatibility, but always verify against your equipment nameplate and panel requirements to ensure a seamless match.

Practical tips for field use

• Prepare by cross-checking the exact S3B-3P-225A-DC reference with your panel or equipment documentation to avoid mismatches.
• Handle and install in accordance with standard electrical safety practices; ensure power is isolated and equipment is de-energized before replacement.
• Keep spare DC-capable S3B breakers on hand for planned maintenance windows to reduce downtime when replacements are needed.