ABB 1SDA066563R1 A3S 400 TMF 400-4000 3p F F 400A 3-Pole Fixed Molded Case Circuit Breaker

The ABB 1SDA066563R1 (A3S 400 TMF 400-4000 3p F F) is a 400 A, 3-pole, fixed-mounted molded case circuit breaker (MCCB) from the Formula A3S range, ABB's compact and economical MCCB series for low-voltage distribution protection. It is fitted with a fixed thermal-magnetic (TMF) trip unit and is rated 50 kA Icu at 400 V AC. Weight is 4.85 kg.

Technical Specifications

Certifications & Standards

• CE: Complies with European Union CE marking directives for electrical equipment
• IEC: Designed and tested in accordance with IEC standards for low-voltage switchgear and controlgear
• RoHS: Compliant with the Restriction of Hazardous Substances Directive (2011/65/EU)
• REACH: Compliant with EU REACH regulation (EC No 1907/2006) on chemical substances
• WEEE: Compliant with Waste Electrical and Electronic Equipment Directive for end-of-life disposal

Selection Notes

• Rated current is 400 A; check it against the continuous load current of the circuit being protected.
• Icu is 50 kA at 400 V AC; confirm it is equal to or higher than the prospective fault current at the installation point.
• This is a 3-pole version for three-phase circuits; select a 4-pole variant if the neutral must be switched. Mounting is fixed (not plug-in or withdrawable).
• The TMF trip unit has fixed thermal and magnetic thresholds, so choose the rating that matches the load rather than relying on field adjustment.