The SPT304 from Vanguard Electronics is a Space Qualified Power Transformer with an inductance of 70 µH. This transformer has a turns ratio of 1CT:2CT and requires a primary voltage of 2.5 V. It has a primary direct current resistance of 0.20 ohms and a secondary direct current resistance of 0.40 ohms. The transformer features tin-lead terminations and welded internal connections. It has a minimum dielectric withstanding voltage of 500 VAC and an insulation resistance of 10K Mohms. The transformer has an interwinding capacitance of 18 pF and low leakage inductance of 150 nH. It is built to meet MIL-STD-981 specification and measures 0.25 × 0.25 × 0.2 inches.
