Recently got some high voltage diodes of unknown properties. Decided to measure their breakdown voltage and estimate their specs based on similar sized models. This was a bit challenging due to the high voltage nature and my measurement setup,for breakdown voltage I am rounding to the nominal standard diode voltages (within 1kV). The leakage current at high voltage my meter only incremented in 100nA, so we are limited, I would expect these are inline with other typical ~1990's-2000's HV diodes.

Diode Parts:

• H1601-30
• CS140U10

H1601-30 Specs:

Measured the forward voltage:

• V Breakdown = 20kV (>10uA)
• I Leakage @ 15kV = 250nA ± 50nA

CS140U10 Specs:

Measured the forward voltage:

Measured Breakdown Voltage & Leakage:

• V Breakdown = 10kV (>10uA)
• I Leakage @ 7kV = 100nA ± 50nA