50W AC/DC enclosed switching power supply +5Volts 4Amps (channel 1) +12Volts 2.0Amps (channel 2) -12Volts 0.5Amp (channel 3) specifications: size (L x W x H) (inches): 3.9 x 3.8 x 1.4 ripple and noise (mV p-p): 80 load regulation: 1.0 percent line regulation: 0.5 percent input: 88-264vac 47-63hz 5G vibration able to withstand 300VAC surge input for 5 seconds short-circuit/overload/overvoltage protection 3-year warranty certifications: UL/cul/TUV/CE/CB for more 12 Volt power supplies. Detailed specifications: primary output voltage (VDC): 5 output current (a): 4 maximum output power (W): 50 family: rt-50 additional output voltages (VDC): 12 | -12 input voltage (VAC): 88 to 264 input frequency: 47 to 63 maximum input current (a): 1.3 output connector Type: screw terminal block number of outputs: 3 product Type: AC to DC power supply efficiency ( percent ): 77 minimum isolation voltage: 3000V operating temperature-min (CEL): -25 operating temperature-max (CEL): 70 Length (inch): 3.9 width (inch): 3.8 height (inch): 1.4 agency approvals: UL/cul/TUV/CE/CB Type: auto switching style: multiple output.