MTBF and Life Cycle are important pointer product reliability. The so-called MTBF (Mean Time Between Failure) mean time to failure for the reliability prediction of expected value, refers to products in the continuous work after a period of time, the average time of the reliability to 36.8%. Mini MTBF is currently using the MIL-HDBK-217F standard, the parts count method to estimate product expected reliability value (excluding fan), refers to the product reaches the count in the time of continuous use, can still work normally probability was 36.8% (e-1=0.368). If the product of continuous use the count of MTBF two times, it can still work normally probability is 13.5% (e-2=0.135).

Life Cycle is the only refers to the products of the electrolytic capacitor at full load conditions of temperature, calculate the service life of an electrolytic capacitor reference value. For example, SP-750-12 C108 Life Cycle= MTBF=769.3K hours, 202.2K hours of capacitance (Ta=45 ° C).