ABB TF42-2.3 Thermal Overload Relay 1.8-2.3A

The ABB TF42-2.3 thermal overload relay provides dependable motor protection for three-phase applications, with a precise current setting range of 1.8 to 2.3 A. Its direct mounting design ensures a secure fit on ABB contactors from AF09 to AF38, and the manual/automatic reset function supports flexible operation in industrial environments.

Advantages

This relay offers a trip class 10 response, ensuring rapid disconnection during overloads to prevent motor damage. The wide operating temperature range from -25 to +60 °C and IP20 protection make it suitable for demanding conditions. Auxiliary contacts (1 NO + 1 NC) allow integration into control circuits for status signaling and interlocking.

Suitable for

• Protection of three-phase motors up to 2.3 A rated current
• Direct mounting on ABB AF09-AF38 contactors
• Industrial control panels and motor starters
• Applications requiring manual or automatic reset

Key specifications

• Current setting range: 1.8 - 2.3 A
• Number of poles: 3
• Trip class: 10
• Rated operational voltage: 690 V AC
• Rated insulation voltage: 690 V
• Rated impulse withstand voltage: 6 kV
• Auxiliary contacts: 1 NO + 1 NC
• Reset type: Manual and Automatic
• Degree of protection: IP20
• Ambient operating temperature: -25 to +60 °C
• Terminal type: Screw terminals
• Standards: IEC/EN 60947-4-1, IEC/EN 60947-5-1

Recommendations

For reliable motor protection in compact starter assemblies, pair the TF42-2.3 with ABB AF series contactors and ensure proper coordination according to IEC standards.