ABB 1SVR730712R2200 CM-MSS.33S Thermistor Motor Protection Relay 2C/O 110-130V/220-240VAC PTC Relay

The ABB CM-MSS.33S (SKU: 1SVR730712R2200) is a thermistor (PTC) motor protection relay from the CM-MSS series, designed to safeguard electric motors against overtemperature damage by monitoring embedded PTC thermistor sensors. The CM-MSS.33S features a dual changeover (2C/O) output contact configuration and accepts a wide supply voltage range of 110–130V AC and 220–240V AC, making it suitable for diverse international control panel applications. With global certifications including ATEX, CE, UKCA, cULus, CCC, and DNV GL, this relay is engineered for demanding industrial and hazardous area environments.

Technical Specifications

Certifications & Standards

• ATEX (Directive 94/9/EC): Approved for use in explosive atmospheres and hazardous area installations
• CE: Conforms to applicable European Union directives
• UKCA: Meets United Kingdom Conformity Assessed requirements for the UK market
• cULus (UL 508): Listed to UL 508 industrial control equipment standard for North American markets
• CCC: China Compulsory Certification for the Chinese market
• CB: International CB Scheme certification for global market access
• DNV GL: Certified for marine and offshore applications
• CAN/CSA C22.2 No. 14: Canadian Standards Association approval for industrial control equipment
• EN 50495: Safety devices for use in potentially explosive atmospheres
• IEC/EN 63000: Technical documentation for assessment of electrical and electronic products regarding restricted substances
• IEC/EN 60079-7: Explosive atmospheres — equipment protection by increased safety
• IEC/EN 60947-5-1: Low-voltage switchgear and controlgear — control circuit devices and switching elements
• IEC/EN 60947-8: Control units for built-in thermal protection (PTC) for rotating electrical machines
• UL 508: Standard for industrial control equipment
• IEC 60715: Dimensions of low-voltage switchgear and controlgear — standardized mounting on rails
• REACH: Compliant with EU REACH regulation on chemical substances
• RoHS: Compliant with EU Restriction of Hazardous Substances directive
• CSA C22.2 / CSA: Canadian Standards Association certified for industrial applications

Applications & Use Cases

• Motor overtemperature protection in industrial drives and automation systems
• Hazardous area motor protection where ATEX compliance is mandatory
• Marine and offshore motor control panels (DNV GL certified)
• Control cabinet integration for motors equipped with embedded PTC thermistor sensors
• International installations requiring multi-voltage supply compatibility (110–130V / 220–240V AC)