The SCS305 from Vanguard Electronics is a Space Grade Power Transformer with a peak primary current of 5 Amps and a restricted earth fault of up to 40V-μS. It has a turns ratio of 1:1:100:100. The MIL-STD-981 qualified transformer has direct current resistance of 3.8 Ohms and an inductance of 8.9 mH. It measures 0.610 x 0.610 x 0.475 Inches.