The IN4937 Axial-lead, Fast Recovery Rectifiers are designed for special applications such as dc power supplies, inverters, converters, ultrasonic systems, choppers, low RF interference and free wheeling diodes. A complete line of fast recovery rectifiers having typical recovery time of 150 nanoseconds providing high efficiency at frequencies to 250 kHz Mechanical Characteristics:- Case: Epoxy, Molded Weight: 0.4 Gram (Approximately) Finish: All External Surfaces Corrosion Resistant and Terminal Leads are Readily Solderable Lead Temperature for Soldering Purposes: 260degC Max. for 10 Seconds Polarity: Cathode Indicated by Polarity Band Specification:- SymbolParameterValueUnits VRRMPeak Repetitive Reverse Voltage600V VRWMWorking Peak Reverse Voltage600V VRDC Blocking Voltage600V VR(RMS)RMS Reverse Voltage420V VRSMNon?Repetitive Peak Reverse Voltage650V IOAverage Rectified Output Current1A IFSMNon-Repetitive Peak Forward Surge Current30A TJOperating Junction Temperature Range? 65 to +150degC TstgStorage Temperature Range? 65 to +150degC