The ESG 4 from Block is a Current Controlled Inrush Current Limiter that has been designed to limit the inrush current present in power tools, transformers, and other loads with high switch-on or inrush currents. It has a voltage rating of up to 253 V and a current rating of 13 A. This inrush current limiter has a resistance of 7.8 ohms. It is currently controlled and includes a no-load detection feature, hence delivering full current limit protection, even if momentarily switched back on. This current limiter is provided with two connection cables with plug and coupling BS 1363 (UK) while ensuring ingress-rating protection, allowing for use in stationary and mobile applications. It offers excellent moisture protection due to XtraDenseFill resin encapsulation and is available in an IP20-rated chassis mount package that measures 4.76 x 2.76 x 2.6 inches.