ABB Thermal Overload Relay, 1 NO/1 NC, Adjustable Current Range 3.1 to 4.2 A, 690V AC/DC, 2W Power Rating, Direct Mount TF42

ABB TF42 Thermal Overload Relay, model TF42, is a high-quality device designed for protection of industrial motors with full load current (FLC) ratings between 3.1 A and 4.2 A. Rated for a contact voltage of 690 V AC/DC and power dissipation of just 2 W, it ensures optimal energy efficiency while safeguarding downstream equipment from current overloads.

The relay includes a 1 NO/1 NC contact configuration and two auxiliary contacts, providing reliable control device signaling and automation integration. Its adjustable current range from 3.1 A to 4.2 A allows fine-tuning to match motor characteristics and prevent nuisance trips. Installation is simplified through a direct mount type that interfaces easily with contactors.

Operating safely within an ambient temperature range of -25°C to 60°C and an IP20 rating, this relay is suitable for a wide range of industrial, manufacturing, HVAC, and automation applications. The combination of automatic and manual reset methods affords flexibility for machinery operation and maintenance needs.

The compact design with dimensions 88.3mm length, 45mm width, and 70.5mm depth fits efficiently in control panels, conserving valuable space. ABB’s TF42 complies with international standards such as IEC/EN 60947 series, UL 508, CB scheme, CE, and others, ensuring dependable performance and global acceptance.

Suitable for motors with FLC ratings of 3.1 A to 4.2 A. Features direct mount type for seamless installation. Equipped with automatic and manual reset methods for operational flexibility. Includes two auxiliary contacts for control device signaling.

Compact size with dimensions of 88.3mm length and 45mm width for space-efficient use. Designed for operation between -25°C to 60°C temperature range. Contact voltage rated at 690V AC/DC suitable for industrial environments.

Low power loss of 2 W reduces energy consumption. Complies with multiple certifications including IEC/EN 60947 series and UL 508. IP20 protection rating for safety against solid foreign objects.

This Thermal Overload Relay is ideal for heavy engineering, renewable energy production, packaging industry, and other environments where motor overload protection is critical. It features a front-facing trip indicator for easy status monitoring, helping to ensure reliable and safe machine operation.

Explore additional ABB automation and control gear products on EnvMart to enhance your industrial control systems and ensure operational excellence.