ABB 1SDA066562R1 A3S 400 TMF 320-3200 3p F F 320A 3-Pole Fixed Molded Case Circuit Breaker

The ABB 1SDA066562R1 (A3S 400 TMF 320-3200 3p F F) is a 320 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. Dimensions (W × H × D) are 139.5 mm × 205 mm × 103.5 mm and weight is 4.547 kg.

Technical Specifications

Certifications & Standards

• CE: Meets European Union safety, health, and environmental protection requirements for the European market.
• IEC: Designed and tested in accordance with IEC standards for low-voltage switchgear and controlgear.
• RoHS: Compliant with the Restriction of Hazardous Substances Directive, free from restricted hazardous materials.
• REACH: Conforms to REACH regulation requirements for chemical substance safety in electrical components.
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for responsible end-of-life disposal.

Selection Notes

• Rated current is 320 A with a magnetic trip (Im) of 3200 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.