ABB 1SDA066762R1 A1N 125 TMF 50-500 4p F F 4P 50A Fixed Moulded Case Circuit Breaker for Transformer, Generator & Installation Protection

The ABB 1SDA066762R1 — catalog number A1N 125 TMF 50-500 4p F F — is a 4-pole, 50 A fixed-mount power circuit-breaker from the Formula A1 Series, engineered for reliable protection of transformers, generators, and general electrical installations. Part of ABB's compact Formula DSA range, the A1N 125 TMF 50-500 4p F F delivers robust overcurrent and short-circuit protection in a slim 101.6 × 130 × 60 mm footprint, making it ideal for space-constrained control panels and distribution boards.

Technical Specifications

Certifications & Standards

• CE: Compliant with EU safety, health, and environmental protection requirements for the European market.
• IEC: Designed and tested in accordance with International Electrotechnical Commission standards for power circuit-breakers.
• RoHS: Restriction of Hazardous Substances directive compliant — free from restricted hazardous materials.
• REACH: Compliant with EU REACH regulation on chemical safety and substance registration.
• WEEE: Registered under the Waste Electrical and Electronic Equipment directive for responsible end-of-life disposal.

Applications & Use Cases

• Transformer protection in industrial and commercial distribution panels
• Generator set protection and isolation in power generation systems
• Main and sub-distribution board protection in industrial installations
• Control panel feeder protection in manufacturing and process automation environments
• Electrical installation protection where compact 4-pole switching and isolation is required