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This 250W small 1U switching power supply follows Enhance original specification, cross replaces ENH-0625A and ENH-0620A industrial power sources. Reserved essential -5V power rail specially designed for older industrial motherboards that cannot work without -5V supply, widely used in embedded IPC, POS cash register, equipment monitoring and legacy automation control cabinets. Compact 1U slim structure fits limited-space small chassis perfectly. Intelligent speed-adjust fan optimizes heat dissipation and reduces idle noise, comprehensive safety circuits effectively guard internal hardware against abnormal grid fluctuation damage, perfect maintenance replacement spare part for industrial equipment repair and renovation.