Description
The TF42-4.2 Thermal Overload Relay is a compact electromechanical motor protection device designed to safeguard three-phase motors from overload and phase-loss conditions. Part of ABB’s TF42 series, this relay provides an adjustable current range of 3.1 to 4.2 amps, ensuring accurate protection for small industrial motors and control systems.
Key Features
- Adjustable Current Range (3.1–4.2 A) – Allows precise matching to motor full-load current
- Trip Class 10 Protection – Provides reliable overload response for motor circuits
- Phase Loss Sensitivity – Detects phase imbalance to prevent motor damage
- Manual or Automatic Reset – Selectable reset modes for flexible operation
- Integrated Auxiliary Contacts (1 NO + 1 NC) – Enables status indication and control circuit integration
- Temperature Compensation – Maintains accurate protection across varying ambient temperatures
- Direct Contactor Mounting – Designed to mount directly to compatible contactors for easy installation
