ABB 1SDA066489R1 A1C 125 TMF 40-400 1p F F 1-Pole 40A Fixed Moulded Case Circuit Breaker

The ABB 1SDA066489R1 — catalog number A1C 125 TMF 40-400 1p F F — is a single-pole, 40 A fixed-mount power circuit-breaker from the ABB Formula A1 series, engineered for the protection of transformers, generators, and electrical installations in industrial control panels. The A1C 125 TMF 40-400 1p F F delivers reliable overcurrent and short-circuit protection with a compact footprint of just 25.4 mm wide, making it ideal for space-constrained distribution boards and switchgear assemblies.

Technical Specifications

Certifications & Standards

• CE: Complies with European Union low-voltage and electromagnetic compatibility directives for unrestricted use across the EU market.
• IEC: Designed and tested in accordance with IEC standards for power circuit-breakers, ensuring consistent performance under international industrial requirements.
• RoHS: Restriction of Hazardous Substances compliant — free from lead, mercury, cadmium, and other restricted materials.
• REACH: Conforms to EU REACH regulation on the registration, evaluation, authorisation, and restriction of chemicals.
• WEEE: Registered under the Waste Electrical and Electronic Equipment directive, supporting responsible end-of-life recycling and disposal.

Applications & Use Cases

• Transformer secondary protection in industrial and commercial power distribution panels
• Generator output protection in standby and prime power installations
• Feeder and branch circuit protection in motor control centres (MCCs)
• Installation protection in switchgear, control cabinets, and DIN-rail assemblies
• Retrofit and upgrade of existing Formula A1 series fixed-mount breaker positions