ABB 1SDA066696R1 A1N 125 TMF 125-1250 1p F F 125A 1-Pole Fixed Moulded Case Circuit Breaker

The ABB 1SDA066696R1 — catalog number A1N 125 TMF 125-1250 1p F F — is a single-pole, 125 A fixed-mount power circuit breaker from the ABB Formula A1 Series, engineered for the protection of transformers, generators, and general electrical installations. Featuring a TMF (Thermal-Magnetic Fixed) trip unit rated at 125–1250 A, the A1N 125 TMF 125-1250 1p F F delivers reliable overcurrent and short-circuit protection in a compact 25.4 mm wide DIN-rail-compatible fixed format, making it ideal for space-constrained control panels and switchgear assemblies.

Technical Specifications

Certifications & Standards

• CE: Conforms to European Union safety, health, and environmental protection requirements
• IEC: Designed and tested in accordance with relevant IEC standards for power circuit breakers
• RoHS: Compliant with the Restriction of Hazardous Substances Directive, restricting 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 disposal

Applications & Use Cases

• Transformer primary and secondary protection in industrial and commercial installations
• Generator protection in standby and prime power systems
• Incoming feeder and installation protection in low-voltage switchgear panels
• Space-critical control panel builds requiring a compact 25.4 mm wide 1-pole breaker
• Industrial automation and motor control centers requiring reliable short-circuit interruption