ABB 1SDA066725R1 A1N 125 TMF 40-400 3p F F 3-Pole 40A 36kA Fixed Moulded Case Circuit Breaker

The ABB 1SDA066725R1 — catalog number A1N 125 TMF 40-400 3p F F — is a 3-pole, fixed-mount power circuit breaker from the ABB Formula A1 Series, rated at 40 A with a breaking capacity of 36 kA at 400 V AC. Designed for trafo, generator, and installation protection, this compact breaker delivers reliable overcurrent and short-circuit protection in demanding industrial and commercial power distribution environments.

Technical Specifications

Certifications & Standards

• CE: Conforms to European Union health, safety, and environmental requirements for electrical equipment.
• RoHS: Compliant with the Restriction of Hazardous Substances Directive — free from restricted substances including lead, mercury, and cadmium.
• REACH: Meets EU REACH regulation requirements, ensuring safe management of chemical substances used in manufacturing.
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for proper end-of-life recycling and disposal.

Applications & Use Cases

• Transformer feeder and secondary-side protection in industrial power distribution panels
• Generator circuit protection in standby and prime power installations
• Main and sub-distribution board installation protection
• Motor control center (MCC) incomer protection
• Commercial and industrial control panel overcurrent protection