ABB TF42-10 Thermal Overload Relay

ABB TF42-10 Thermal Overload Relay, 7.6–10 A setting range, part number 1SAZ721201R1043, with screw-terminal main connections and a three-pole main circuit designed for motor protection in ABB motor starters. It provides thermal overload protection with trip class 10, operates at 50/60 Hz, and is rated for up to 690 V AC on the main circuit; the auxiliary circuit is NC rated up to 6 A. The setting range (7.60–10.00 A) corresponds to the device’s overload protection window, with per-pole power loss of about 1.1–2.0 W and short-circuit protection device coordination type 2 using a 35 A gG device. The TF42-10 uses screw terminals for wiring, carries an IP20 enclosure rating, and is rated for an ambient temperature range from -25 to 60 °C. Dimensions are approximately 88 mm high × 45 mm wide × 71 mm deep (about 3.48 in × 1.77 in × 2.78 in). Ideal for protecting 3-phase motors in industrial control circuits, it complements ABB contactors in motor starters where reliable, compact overload protection for motors up to 690 V at 50/60 Hz is required.