ABB OTDC400UF22 Industrial Direct Current Contactor

ABB OTDC400UF22 PV disconnect switch is a four-pole direct-current switch-disconnector for 1000 V DC utility-scale photovoltaic installations, rated for 400 A and designed to cover a 315–630 A current range. It provides lug-terminal connections in a base-mounted IP20 enclosure with approximate dimensions of 211 mm high × 255.5 mm wide × 135 mm deep. The unit supports a direct-mount handle option (OTDC_K) for manual operation and is cataloged as 1SCA158300R1001, part of ABB’s OTDC PV-disconnect family. Typical applications include isolating PV arrays and downstream DC equipment such as inverters during maintenance or fault conditions.