ABB 1SDA066758R1 A1N 125 TMF 20-400 4p F F 20A 4-Pole Fixed Moulded Case Circuit Breaker

The ABB A1N 125 TMF 20-400 4p F F (SKU: 1SDA066758R1) is a 4-pole, 20 A fixed-mount power circuit breaker from the Formula A1 Series, engineered for the protection of transformers, generators, and distribution installations in industrial and commercial power systems. Compact at 101.6 × 130 × 60 mm and weighing just 1 kg, this breaker delivers robust overcurrent protection in a space-efficient package suitable for demanding control panel environments.

Technical Specifications

Certifications & Standards

• CE: Compliant with EU Low Voltage and EMC Directives for sale and installation across the European Economic Area.
• RoHS: Restriction of Hazardous Substances — free from restricted substances including lead, mercury, and cadmium per EU Directive 2011/65/EU.
• REACH: Compliant with EU REACH regulation (EC No 1907/2006) concerning the safe use of chemical substances.
• CB Scheme Certificate: IEC CB Scheme certification confirming conformity to international IEC safety standards, accepted in 57+ member countries.
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive (2012/19/EU) for responsible end-of-life recycling.

Applications & Use Cases

• Transformer secondary protection in industrial and commercial distribution boards
• Generator output circuit protection for standby and prime power systems
• Main and feeder circuit protection in control panels and switchgear assemblies
• Installation protection in building services, manufacturing facilities, and infrastructure projects
• Retrofit or replacement of legacy 4-pole fixed moulded case circuit breakers in existing panels