ABB 193-KB48 Thermal Overload Relay

ABB 193-KB48 is a miniature three-pole bi-metallic thermal overload relay designed to protect small three-phase motors by monitoring current and motor-winding temperature. It provides an adjustable trip setting from 3.5 to 4.8 A and is commonly paired with ABB 100-K09 or 100-K12 three-pole contactors to form a compact motor-protection starter, with a typical motor protection rating around 2.2 kW. The relay supports both manual and automatic reset, offers trip indication, and includes phase-loss protection, delivering Class 10 tripping performance to discriminate overload events from nuisance trips. As part of the 193-K family, the KB48 variant delivers a plug-in, field-adjustable overload solution that integrates with standard AC motor starters for industrial applications, providing reliable thermal protection in a compact package.