ABB 1SDA066568R1 A3N 400 TMF 320-3200 4p F F InN=100%In 4-Pole 400A Fixed Air Circuit Breaker

The ABB 1SDA066568R1 A3N 400 TMF 320-3200 4p F F InN=100%In is a 4-pole, 400 A fixed-mounted air circuit breaker (ACB) from ABB's Formula DSA series, designed for low-voltage power distribution and switchgear applications requiring robust overcurrent and short-circuit protection. The A3N 400 TMF 320-3200 4p F F InN=100%In features a thermal-magnetic TMF trip unit with a wide adjustment range of 320–3200 A and 100% neutral pole current rating, making it ideal for demanding industrial and commercial installations.

Technical Specifications

Certifications & Standards

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

Applications & Use Cases

• Main incoming protection in low-voltage switchboards and motor control centres (MCCs)
• Bus-coupler and outgoing feeder protection in industrial power distribution panels
• Generator and transformer secondary protection requiring wide trip unit adjustment
• Commercial buildings, data centres, and critical infrastructure requiring 4-pole ACB with 100% neutral rating
• Any application demanding high breaking capacity and reliable overcurrent trip in a fixed-mount open ACB format