ABB 1SAM451000R1018 MS165-73 62-73A 3P 45kW 400V Motor Protection Circuit-Breaker

The ABB MS165-73 motor protection circuit-breaker (SKU: 1SAM451000R1018) delivers reliable manual motor starting and protection for three-phase motors up to 45 kW at 400 V, with an adjustable current range of 62–73 A. Designed for demanding industrial automation and control panel applications, the MS165-73 provides overload, short-circuit, and phase-failure protection in a compact, robust package rated for breaking capacities up to 30 kA at 230 V AC.

Technical Specifications

Certifications & Standards

• CE: Conformité Européenne — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed — required for placing products on the Great Britain market
• UL: Underwriters Laboratories — certified for the North American market
• CSA: Canadian Standards Association — certified for Canadian market requirements
• EAC: Eurasian Conformity — certified for the Eurasian Economic Union market
• IECEx: IEC System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres
• ATEX: Atmosphères Explosibles — certified for use in potentially explosive atmospheres (EU Directive)
• CCC: China Compulsory Certification — mandatory certification for the Chinese market
• KC: Korea Certification — certified for the South Korean market
• IEC/EN 60947-1: Low-voltage switchgear and controlgear — general rules
• IEC/EN 60947-2: Low-voltage switchgear and controlgear — circuit-breakers
• IEC/EN 60947-4: Low-voltage switchgear and controlgear — contactors and motor-starters
• IEC 60068-2: Environmental testing — climatic and mechanical durability
• EN 45555: General methods for the assessment of the ability of energy-related products to be repaired, reused, upgraded, or recovered
• EN 45555-93: Supplementary standard for energy-related product sustainability assessment
• REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals — EU chemical compliance
• RoHS: Restriction of Hazardous Substances — restricts use of specific hazardous materials in electrical equipment
• WEEE: Waste Electrical and Electronic Equipment Directive — responsible end-of-life disposal compliance

Applications & Use Cases

The ABB MS165-73 is engineered for motor protection in industrial automation systems, manufacturing plants, HVAC installations, pump stations, compressor drives, and conveyor systems. Its wide current adjustment range makes it ideal for design engineers specifying protection for motors close to the 45 kW boundary, while its multi-market certifications — including UL, CSA, ATEX, and CCC — simplify global machine builder and OEM compliance. The MS165-73 mounts directly in control panels and motor control centers (MCCs), offering a space-efficient 3-pole solution where dependable fault isolation and personnel safety are paramount.