2N2857UB Qualified Levels: RF and MICROWAVE DISCRETE JAN, JANTX, Available on LOW POWER TRANSISTORS and JANTXV commercial versions Qualified per MIL-PRF-19500/343 DESCRIPTION The 2N2857UB is a military qualified silicon NPN transistor (also available in commercial version), designed for UHF equipment and other high-reliability applications. Common applications include low noise amplifier oscillator, and mixer applications. Microsemi also offers numerous other products to meet higher and lower power voltage regulation applications. Important: For the latest information, visit our website 2N2857UB MECHANICAL and PACKAGING CASE: Ceramic. TERMINALS: Gold plating over nickel underplate. RoHS compliant matte/tin available on commercial grade only. MARKING: Part number, date code, manufacturers ID. TAPE & REEL option: Standard per EIA-418D. Consult factory for quantities. WEIGHT: < 0.04 Grams. See Package Dimensions on last page. PART NOMENCLATURE JAN 2N2857 UB (e3) Reliability Level RoHS Compliance JAN=JAN level e3 = RoHS compliant (available JANTX=JAN level on commercial grade only) JANTXV=JANTXV level Blank = non-RoHS compliant Blank = Commercial Surface Mount package JEDEC type number (See Electrical Characteristics table) SYMBOLS & DEFINITIONS Symbol Definition I Collector current (dc). C I Base current (dc). B T Ambient or free air temperature. A T Case temperature. C V Collector to base voltage (dc). CB V Emitter to base voltage (dc). EB T4-LDS-0223-1, Rev. 1 (120178) 2011 Microsemi Corporation Page 2 of 5