Carlo Gavazzi RGH series single-phase solid-state contactors (SSR) with integrated heatsink and high blocking voltage (1600 Vp, built-in varistor), zero-cross switching, for DIN-rail or panel mounting, IP20. Rated currents 23–60 A (AC-51, up to 75 A at 25 °C), voltage 42–600 VAC (type 69: up to 690 VAC). Control 4–32 VDC (D types) or 20–275 VAC/24–190 VDC (A types). Insulation 4000 Vrms input/output and to the enclosure, overvoltage category III 6 kV, SCCR 100 kA, operating temperature range −40…+80 °C. Compliance: EN/IEC 60947-4-2/-4-3, UL 508, and railway standards EN 50155, EN 45545-2 (HL1/HL2), EN 50121-3-2 and EN 61373. Applications: durable contactless switching of heaters and resistive loads in substations and rolling stock - heating control, dryers, and thermal circuits requiring high voltage withstand.