ABB 1SDA066783R1 A2N 250 TMF 175-1750 3p F F 175A 3-Pole Fixed Molded Case Circuit Breaker

The ABB 1SDA066783R1 (A2N 250 TMF 175-1750 3p F F) is a 175 A, 3-pole, fixed-mounted molded case circuit breaker (MCCB) from the Formula A2N 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 36 kA Icu at 400 V AC. Dimensions (W × H × D) are 105 mm × 150 mm × 60 mm and weight is 1.3 kg.

Technical Specifications

Certifications & Standards

• IEC: Designed and tested in accordance with IEC low-voltage switchgear and controlgear standards for circuit breakers.
• CE: Conformité Européenne marking confirms compliance with applicable EU directives for electrical equipment.
• RoHS: Compliant with the Restriction of Hazardous Substances Directive, limiting use of restricted materials in electrical and electronic equipment.
• REACH: Compliant with EU REACH regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals).
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for responsible end-of-life recycling and disposal.

Selection Notes

• Rated current is 175 A with a magnetic trip (Im) of 1750 A; check it against the continuous load current of the circuit being protected.
• Icu is 36 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.