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Power supply unit Black Box MDR-40-12, 40 W, 12 V output, 85–264 VAC input, 47–63 Hz, blue/white
Black Box MDR-40-12 is a compact 40 W switching power supply that provides a regulated 12 V DC output for industrial and electronics applications. It accepts a universal AC input of 85–264 VAC at 47–63 Hz with 1% voltage tolerance and features a short rise time. The unit is housed in a blue and white enclosure sized for DIN-rail or panel installation and is certified to cUL and CE standards.
The MDR-40-12 combines a narrow DIN-rail design with protection features including short-circuit, overload and over-voltage protection, and finger-safe terminals for safer handling. Its wide input range and extended operating temperature capability make it suitable for varied industrial environments, while an LED indicates DC output status to simplify monitoring.
Mount the power supply on a DIN rail or panel according to installation space and secure the enclosure. Connect the AC input within the specified 85–264 VAC range and observe correct polarity on the 12 V DC output connections. Verify the LED indicator to ensure DC output presence. Follow standard wiring and grounding practices and allow adequate ventilation around the unit during operation.
Use the MDR-40-12 in environments within the stated temperature range and ensure the connected load does not exceed 40 W. Although the device can accept DC input in a wider range, only use DC voltages if suitable and certified for your application. Regularly inspect terminal connections and keep ventilation clear to maintain reliable operation.
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