Technical Parameters Basic Electrical Ratings Type: Thermal overload relay Adjustable Current Setting Range: 2.8 … 4.0 A Rated Operational Current (Ie): 4 A Number of Poles / Protected Poles: 3 Trip Class: Class 10A Rated Insulation Voltage (Ui): 690 V Rated Impulse Withstand Voltage (Uimp): ~6 kV Rated Frequency: 50 / 60 Hz Contacts Auxiliary Contacts: 1 NC (normally closed) — trip contact 1 NO (normally open) — signal contact Contact Ratings: AC‑15 / control duties: up to ~3 A (NC) and ~1.5–1.2 A (NO) depending on voltage level Typical auxiliary rating examples: ~3 A @ 120 V AC (NC) ~1.2 A @ 240 V AC (NO) Protection & Functional Features Motor Protection: Overload protection with phase failure sensitivity Temperature Compensation: Included for stable trip performance across ambient ranges Trip‑Free Mechanism: Yes (prevents welded closed in overload) Reset Options: Manual or automatic reset selectable Stop & Test Functions: Integrated Mechanical & Installation Mounting: Direct mount on compatible ABB contactors (TA/TF series) Terminal Type: Screw terminals Connecting Capacity: Flexible conductors: 0.75 … 4 mm² Rigid conductors: 0.75 … 4 mm² Flexible with ferrules: 1 or 2 conductors per terminal Degree of Protection: IP20 on housing; IP10 at main circuit terminals Pollution Degree: 3 Physical & Environmental Approx. Dimensions: ~44 mm (W) × ~80 mm (H) × ~94 mm (D) Approx. Weight: ~0.15 kg Ambient Operating Temperature: –25 °C to +55 °C Storage Temperature Range: –40 °C to +70 °C