ABB 1SAZ721201R1017 TF42-0.55 0.41-0.55A 3P Thermal Overload Relay

The ABB TF42-0.55 thermal overload relay (SKU: 1SAZ721201R1017) is a 3-pole motor protection device with a rated current range of 0.41 to 0.55 A, designed for reliable overload and phase-failure protection in industrial control panels and motor starter assemblies. Part of ABB's TF42 series, it carries an extensive list of global certifications including ATEX, UL, CE, and IECEx, making it suitable for demanding and hazardous-location applications worldwide.

Technical Specifications

Certifications & Standards

• ATEX: Approved for use in explosive atmospheres
• UL: Underwriters Laboratories listed for North American markets
• LR: Lloyd's Register type approval
• RINA: Italian Naval Register certification
• IEC 60947-1: General rules for low-voltage switchgear and controlgear
• EN 60947-1: European harmonised standard for low-voltage switchgear
• IEC/EN 60947: Low-voltage switchgear and controlgear suite
• IEC/EN 60947-5: Control circuit devices and switching elements
• IEC 60068-2: Environmental testing standard
• EN 60947: European low-voltage switchgear standards
• EN 60947-4: Contactors and motor starters
• EN 60947-5: Control circuit devices and switching elements (EN edition)
• EN 45555: General methods for assessing the energy efficiency of networked standby
• UL 2799: Zero Waste to Landfill verification
• CSA: Canadian Standards Association certified
• RoHS: Restriction of Hazardous Substances compliant
• REACH: EU chemical safety regulation compliant
• WEEE: Waste Electrical and Electronic Equipment directive compliant
• CCC: China Compulsory Certification
• CE: European Conformity marking
• UKCA: UK Conformity Assessed marking for Great Britain market
• EAC: Eurasian Conformity marking for Eurasian Economic Union
• IECEx: International standard for equipment used in explosive atmospheres

Applications & Use Cases

• Motor overload and phase-failure protection in industrial automation systems
• Control panel assembly with ABB contactors in the TF42 series combination starters
• Hazardous-location installations requiring ATEX and IECEx compliance
• Marine and offshore applications (LR and RINA certified)
• OEM machinery, conveyor drives, pump stations, and HVAC motor circuits rated up to 0.55 A