ABB 1SDA066786R1 A2N 250 TMF 250-2500 3p F F 250A 3-Pole Fixed Molded Case Circuit Breaker

The ABB 1SDA066786R1 (A2N 250 TMF 250-2500 3p F F) is a 250 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. Weight is 1.467 kg.

Technical Specifications

Certifications & Standards

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

Selection Notes

• Rated current is 250 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.