GT32S22A is a differential overload relay with 3 heaters providing phase failure protection, specifically configured for a setting range of 16–22 A. This relay is designed for direct mounting beneath contactors using screw clamp terminals and operates at a rated operational voltage up to 690 V with a rated insulation voltage of 6 kV. The device features a tripping class per IEC 60947-4-1, temperature compensation from -5 °C to +40 °C, and a degree of protection of IP 20. It is compatible with GC32S contactors and includes trip indicating, stop, test, and manual/automatic reset functions. The GT32S22A is commonly used in motor protection and industrial control applications where reliable overload detection and phase failure protection are essential.