ABB | S3N125TW | Circuit Breaker | 125A | 3-Pole | 600V

ABB S3N125TW Circuit Breaker is a rugged 3‑pole protective device rated for 125A and capable of handling up to 600V. Designed for reliable overcurrent protection in three‑phase systems, it’s a trusted choice for dependable power distribution in commercial and light‑industrial environments.

This model is specifically suited for maintenance, retrofit, and replacement projects where exact specifications matter. By matching the S3N125TW part number, you ensure compatibility with the existing panel architecture and electrical system, reducing the risk of mismatched components during upgrades or repairs.

Key specifications

• Amperage: 125A
• Poles: 3‑Pole
• Voltage rating: 600V
• Brand: ABB
• Part number: S3N125TW

Why this model stands out

• Balanced three‑phase protection: The 3‑pole configuration delivers synchronized interruption across all phases, helping prevent uneven loading and reducing the risk of equipment damage.
• Specific replacement compatibility: The S3N125TW is tailored for replacement and retrofit projects where panel parts must align with existing OEM specifications, simplifying stock and maintenance planning.
• Clear reference for ordering: When matching parts, the part number is your most reliable indicator of compatibility, minimizing guesswork during procurement.

Compatibility and installation notes

Important: Confirm fit and ratings before ordering. The part number S3N125TW is the best reference for compatibility, as panel interfaces and series variants can affect whether a given breaker will install correctly in your distribution setup. Before purchase, compare:

• Current breaker amperage and system voltage with your panel specification
• Number of poles to match your three‑phase circuit
• Physical fit and mounting method to ensure proper bus connection and enclosure clearance

Ideal use cases

• Replacing a failed or aging circuit breaker in a three‑phase distribution panel where a 125A, 600V device is required
• Retrofit projects that need to preserve the same protection level while updating other components in the power system
• Maintenance schedules for commercial or light‑industrial electrical installations that rely on ABB‑style replacement parts

With the ABB S3N125TW, you’re selecting a proven protection solution that aligns with established electrical practices for three‑phase systems. Its 125A rating and 600V capability cover a broad range of distribution panels, ensuring consistent performance when downtime isn’t an option.