ABB T16-5.7 Thermal Overload Relay

ABB T16-5.7 Thermal Overload Relay is an economical electromechanical protection device for the main circuit in motor starter assemblies. It provides adjustable overload protection with a setting range of 4.20 to 5.70 amperes per pole, enabling precise protection for small to medium motors, and it supports both automatic and manual reset configurations. The relay’s setting, per-pole resistance of 0.059 mΩ, and power loss of 1.1–2.0 W across the range are specified to help predict heat generation and ensure stable operation in typical installations. It coordinates with short-circuit protection devices (type 2 coordination) and is designed to work with gG fuses up to 20 A, aligning with common industrial protection schemes. The model is identified by ABB part number 1SAZ711201R1038, placing it within ABB’s T16 family of thermal overload relays that protect motors from overload and phase faults in a compact, reliable package.