ABB 1SAZ721201R1051 TF42-24 20-24A 3P Thermal Overload Relay

The ABB TF42-24 thermal overload relay (SKU: 1SAZ721201R1051) is a 3-pole overload protection device rated for 20–24A, engineered for reliable motor protection in demanding industrial automation and control panel applications. Part of ABB's TF42 series, the TF42-24 delivers accurate, temperature-compensated current monitoring to safeguard motors against overload and phase-loss conditions — making it a trusted choice for engineers and procurement professionals worldwide.

Technical Specifications

Certifications & Standards

• ATEX: Certified for use in explosive atmospheres
• UL: Underwriters Laboratories listed for North American markets
• RINA: Marine classification society approval
• RMRS: Russian Maritime Register of Shipping approval
• IEC/EN60947-1: Low-voltage switchgear and controlgear — general rules
• IEC/EN60947-4: Contactors and motor-starters
• IEC/EN60947-5: Control circuit devices and switching elements
• IEC60335-2: Safety of household and similar electrical appliances
• IEC 60068-2: Environmental testing
• EN60947-1: European harmonized low-voltage switchgear general rules
• EN60947-4: European harmonized contactors and motor-starters standard
• EN60947-5: European harmonized control circuit devices standard
• EN45555: General methods for the assessment of the ability to repair, reuse and upgrade energy-related products
• UL 2799: Electrical waste standard
• CSA: Canadian Standards Association certification
• 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
• IECEx: International certification for equipment used in explosive atmospheres

Applications & Use Cases

• Motor overload and phase-loss protection in industrial automation systems
• Integration with ABB contactors in motor starter combinations
• Control panel assembly for manufacturing, HVAC, and process industries
• Marine and offshore installations (RINA, RMRS approved)
• Hazardous area applications requiring ATEX or IECEx certification
• Global projects requiring multi-standard compliance (UL, CSA, CE, CCC, EAC, UKCA)