ABB 1SDA066722R1 A1N 125 TMF 20-400 3p F F 20A 3-Pole Fixed Moulded Case Circuit Breaker

The ABB 1SDA066722R1 A1N 125 TMF 20-400 3p F F is a 3-pole, 20 A fixed-mounted power circuit breaker from the Formula A1 series, engineered for reliable protection of transformers, generators, and electrical installations. Featuring a TMF (Thermal-Magnetic Fixed) trip unit, this compact breaker delivers robust overcurrent and short-circuit protection in demanding industrial environments. With its slim 76.2 mm width and 0.789 kg lightweight construction, the A1N 125 TMF 20-400 3p F F fits easily into space-constrained control panels and distribution boards.

Technical Specifications

Certifications & Standards

• CE: Compliant with European Union directives for electrical safety and electromagnetic compatibility
• IEC: Designed and tested in accordance with IEC standards for circuit protection devices
• CB Scheme Certificate: Internationally recognised CB scheme certification for global market acceptance
• RoHS: Compliant with the Restriction of Hazardous Substances directive, limiting use of harmful materials
• REACH: Meets EU REACH regulation requirements for chemical substance safety
• WEEE: Registered under the Waste Electrical and Electronic Equipment directive for responsible end-of-life recycling

Applications & Use Cases

• Transformer feeder and secondary protection in industrial and commercial installations
• Generator circuit protection in standby and prime power systems
• Main and sub-distribution board protection in factories, data centres, and infrastructure projects
• Motor feeder protection where TMF characteristics match the load profile
• Control panel circuit protection in automation and process control environments