2N4261 Qualified Levels: JAN, JANTX, JANTXV PNP Small Signal Silicon Transistor Compliant and JANS available Qualified per MIL-PRF-19500/511 DESCRIPTION This 2N4261 small signal transistor comes in a hermetically sealed metal TO-72 package and is military qualified for high-reliability applications. It is also available in a low-profile UB surface mount package or with a ceramic lid in the UBC package. Important: For the latest information, visit our website 2N4261 MECHANICAL and PACKAGING CASE: Ni plated kovar, Ni cap TERMINALS: Gold over nickel plated kovar leads, solder dipped. RoHS compliant are available without solder dip on commercial grade only. MARKING: Manufacturers ID, date code, part number POLARITY: PNP, see case outline on last page WEIGHT: Approximately 0.322 grams See Package Dimensions on last page. PART NOMENCLATURE JAN 2N4261 Reliability Level JEDEC type number JAN = JAN level (see Electrical Characteristics JANTX = JANTX level table) JANTXV = JANTXV level JANS = JANS level Blank = Commercial grade SYMBOLS & DEFINITIONS Symbol Definition I Base current: The value of the dc current into the base terminal. B I Collector current: The value of the dc current into the collector terminal. C V Collector-base voltage: The dc voltage between the collector and the base. CB Collector-base voltage, base open: The voltage between the collector and base terminals when the emitter terminal is V CBO open-circuited. V Collector-emitter voltage: The dc voltage between the collector and the emitter. CE Collector-emitter voltage, base open: The voltage between the collector and the emitter terminals when the base V CEO terminal is open-circuited. V Collector-supply voltage: The supply voltage applied to a circuit connected to the collector. CC Emitter-base voltage, collector open: The voltage between the emitter and base terminals with the collector terminal V EBO open-circuited. V Emitter-base voltage: The dc voltage between the emitter and the base EB T4-LDS-0150, Rev 3 (10/9/13) 2013 Microsemi Corporation Page 2 of 4