The adaptor shall be designed and produced to have a mean time between failures (MTBF)of 50000 operating hours 90% confidence-level while operating under the following conditions:80% maximum load at 25℃,nominal input voltage.Standard: MIL-HDBK-217FThe surge of 6KV is used to impact the power input, and it is not required to pass the test, but not explosion, combustion, etc..confidence-level