1N4478US Microchip

1N4460US 1N4496US and 1N6485US 1N6491US Qualified Levels: VOIDLESS HERMETICALLY SEALED SURFACE JAN, JANTX, Available on MOUNT 1.5 WATT GLASS ZENER DIODES JANTXV and JANS commercial versions Qualified per MIL-PRF-19500/406 DESCRIPTION This surface mount, Zener voltage regulator series is military qualified to MIL-PRF-19500/406 and is ideal for high-reliability applications where a failure cannot be tolerated. These industry- recognized 1.5 watt Zener voltage regulators are hermetically sealed with void-less glass construction using an internal metallurgical bond. It includes Zener selections from 3.3 to 200 volts in standard 5% tolerance. 1% and 2% tolerance versions are also available. Microsemi also offers numerous other Zener products to meet higher and lower power ratings in both thru-hole and surface mount packages. A (D-5A) MELF Important: For the latest information, visit our website 1N4460US 1N4496US and 1N6485US 1N6491US MECHANICAL and PACKAGING CASE: Hermetically sealed voidless hard glass with tungsten slugs. TERMINALS: Tin/lead (Sn/Pb) or RoHS compliant matte/tin (commercial grade only) over copper. MARKING: Polarity band only. POLARITY: Cathode indicated by band. TAPE & REEL option: Standard per EIA-481-B. Consult factory for quantities. WEIGHT: 193 milligrams. See Package Dimensions on last page. PART NOMENCLATURE JAN 1N4460 US C (e3) Reliability Level RoHS Compliance JAN = JAN Level e3 = RoHS compliant (available JANTX = JANTX Level on commercial grade only) JANTXV = JANTXV Level Blank = non-RoHS compliant JANS = JANS Level Blank = Commercial Tolerance Level Blank = 5 % JEDEC type number C = 2 % (See Electrical Characteristics D = 1% table) MELF Surface Mount SYMBOLS & DEFINITIONS Symbol Definition V Zener Voltage: The Zener voltage the device will exhibit at a specified current (I ) in its breakdown region. Z Z I , I , I Regulator Current: The dc regulator current (I ), at a specified test point (I ), near breakdown knee (I ). Z ZT ZK Z ZT ZK Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a Z or Z ZT ZK specified rms current modulation (typically 10% of I or I ) and superimposed on I or I respectively. ZT ZK ZT ZK V Maximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current. F Maximum Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and I R temperature. I Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating. ZM I Maximum Zener Surge Current: The non-repetitive peak value of Zener surge current at a specified wave form. ZSM T4-LDS-0183-1, Rev. 1 (120901) 2012 Microsemi Corporation Page 2 of 6