ABB 1SAZ431201R1004 TF140DU-142 3P 110-142A Thermal Overload Relay

The ABB TF140DU-142 thermal overload relay (SKU: 1SAZ431201R1004) is a 3-pole overload protection device rated for 110 to 142 A, engineered for reliable motor protection in demanding industrial automation and control panel applications. Designed to safeguard motors and downstream equipment from overload conditions, the TF140DU-142 delivers precise, consistent trip characteristics in accordance with IEC/EN 60947 standards. Compact yet robust at 165 × 151 × 133 mm and 0.945 kg, this relay integrates seamlessly into motor starter assemblies.

Technical Specifications

Certifications & Standards

• UL: Listed under Underwriters Laboratories for North American market safety compliance
• LR: Lloyd's Register type approval for marine and offshore applications
• RINA: Registro Italiano Navale certification for marine equipment
• RMRS: Russian Maritime Register of Shipping approval
• IEC 60947-1: Low-voltage switchgear and controlgear — General rules
• EN 60947-1: European harmonized standard for low-voltage switchgear — General rules
• IEC/EN 60947: Comprehensive IEC/EN low-voltage switchgear and controlgear series compliance
• IEC 60068-2: Environmental testing standard for climatic and mechanical robustness
• EN 60947: European low-voltage switchgear series standard
• EN 60947-4: Contactors and motor-starters performance standard
• EN 60947-5: Control circuit devices and switching elements standard
• EN 45555: General methods for the assessment of the ability to recover resources from electrical and electronic equipment
• CSA: Canadian Standards Association certification for the Canadian market
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation on chemical substances
• WEEE: Waste Electrical and Electronic Equipment Directive compliant
• CCC: China Compulsory Certification for the Chinese market
• CE: European Conformity marking — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed marking for the Great Britain market post-Brexit
• EAC: Eurasian Conformity marking for the Eurasian Economic Union markets

Applications & Use Cases

• Motor overload protection in industrial motor starter assemblies
• Control panel integration for manufacturing and process automation
• Protection of pumps, compressors, fans, and conveyors in heavy-duty environments
• Marine and offshore electrical systems (LR, RINA, RMRS approved)
• Applications requiring multi-market certification (UL, CSA, CCC, CE, EAC, UKCA)