ABB 1SDA067449R1 XT1H 160 TMD 50-500 3p F F 50A 3-Pole Fixed Molded Case Circuit Breaker

The ABB 1SDA067449R1 (XT1H 160 TMD 50-500 3p F F) is a 50 A, 3-pole, fixed-mounted molded case circuit breaker (MCCB) from the Tmax XT1 range, ABB's current-generation MCCB series (160 A frame). It is fitted with a thermal-magnetic (TMD) trip unit and is rated 70 kA Icu at 400 V AC.

Technical Specifications

Certifications & Standards

• IEC 60947-2: Compliant with the international standard for low-voltage circuit breakers, ensuring verified breaking and operational performance
• CE: Meets European conformity requirements for electrical equipment placed on the EU market
• VDE: Certified by the German Association for Electrical, Electronic & Information Technologies, confirming independent safety testing
• ATEX: Approved for use in explosive atmospheres in accordance with European ATEX directives
• UL 2799: Listed under UL 2799 for applicable North American market requirements
• RoHS: Compliant with the EU Restriction of Hazardous Substances Directive, free from restricted materials
• REACH: Compliant with REACH regulation (EC No 1907/2006) on chemical substance safety

Selection Notes

• Rated current is 50 A with a magnetic trip (Im) of 500 A; check it against the continuous load current of the circuit being protected.
• Icu is 70 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 TMD trip unit is thermal-magnetic; check the thermal setting and magnetic trip values in the ABB catalog against the load and the protection coordination plan.