Mitsubishi SD-Q19-DC24V DC Interface Contactor for PLC Transistor Output Control

The Mitsubishi SD-Q19-DC24V (SD-Q19-DC24V) is a compact DC-operated interface contactor in the SD-Q series, designed to be driven directly by a 24 V DC transistor output from a programmable logic controller or similar control device. It has three main poles and 1NO+1NC auxiliary contacts, with a 24 V DC coil, and is intended for panel builders who need contactor switching without a separate interface relay. The SD-Q19 version uses an efficient electromagnet with a permanent magnet; its coil operating current is 75 mA (1.8 W), allowing direct drive from a 24 V DC, 0.1 A transistor output. A built-in surge absorber limits coil surge voltage, while twin auxiliary contacts and a terminal cover support reliable switching and safer maintenance. The contactor can be mounted on 35 mm DIN rail or by screw fixing and is suited to circuit interruption, heater switching, motor starters, and reversing contactor arrangements used with thermal overload relays. It is a practical spare for Mitsubishi SD-Q series control panels and PLC-driven switching circuits.