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Power supply 12V, 40A, 500W with fan.  Features: Thin type 50mm profile switching power supply operating in pulse mode. Small volume, low weight, high efficiency. Protections: short circuit / over temperature / overload / over voltage. Forced-air cooling via built-in DC fan with automatic temperature-controlled operation. Thanks to its ultra-slim design, the unit can be conveniently installed in electrical distribution and automation cabinets where space saving is important.  Suitable for industrial, automation, control, and electrical distribution systems.   Specifications: Type: switching power supply. Input range AC: 100-240V. Frequency 47-63Hz. Output voltage DC: 12V. DC voltage adjustable range: ±10%. Max.output current: 40A. Rated power: 500W. AC current: 10.5A/110V, 5.5A/220V. Ripple and noise: 150mV p-p. Efficiency: 85%. Leakage current: