1N5523BUR-1 Microchip

1N5518BUR-1 thru 1N5546BUR-1 Qualified Levels: Low Voltage Avalanche JAN, JANTX and Available on 500 mW Zener Diodes commercial JANTXV versions Qualified per MIL-PRF-19500/437 DESCRIPTION The 1N5518BUR-1 thru 1N5546BUR-1 series of 0.5 watt glass surface mount Zener voltage regulators provides a selection from 3.3 to 33 volts with tolerances ranging from plus/minus 1% to 20%. The standard tolerance is plus/minus 5% with the B suffix unless ordered otherwise. These glass surface mount devices are available with an internal metallurgical bond option. This type of bonded Zener package construction is also in JAN, JANTX, and JANTXV military qualifications. Microsemi also offers numerous other Zener products to meet higher and lower power applications. DO-213AA MELF Package Important: For the latest information, visit our website 1N5518BUR-1 thru 1N5546BUR-1 MECHANICAL and PACKAGING CASE: Hermetically sealed glass DO-213AA (SOD80 or MLL34) MELF style package. TERMINALS: End caps tin-lead plated or RoHS compliant matte-Tin plating available (on commercial only) solderable per MIL- STD-750, method 2026. POLARITY: Cathode indicated by band where diode is to be operated with the banded end positive with respect to the opposite end for Zener regulation. o MOUNTING SURFACE SELECTION: The Axial Coefficient of Expansion (COE) of this device is approximately +6 PPM/ C. The COE of the Mounting Surface System should be selected to provide a suitable match with this device. MARKING: cathode band only. TAPE & REEL option: Standard per EIA-481-1-A with 12 mm tape (add TR suffix to part number). Consult factory for quantities. WEIGHT: 0.04 grams. See Package Dimensions on last page. PART NOMENCLATURE JAN 1N5518 B UR -1 (e3) Reliability Level RoHS Compliance JAN = JAN Level e3 = RoHS compliant (available JANTX = JANTX Level on commercial grady only) JANTXV = JANTXV Level Blank = non-RoHS compliant Blank = Commercial Metallurgical Bond JEDEC type number -1 = Metallurgical bond See Electrical Characteristics table Package type UR = surface mount Zener Voltage Tolerance A = 10% B = 5% C = 2% D = 1% Blank = 20% SYMBOLS & DEFINITIONS Symbol Definition I Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature. R 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 I Low Regulator (Zener) Current: The lowest rated dc current for the specified power rating. ZL I Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating. ZM V Zener Voltage: The zener voltage the device will exhibit at a specified current (I ) in its breakdown region. Z Z Voltage Regulation: The change in zener voltage between two specified currents or percentage of I . VZ ZM 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 T4-LDS-0037, Rev 2 (111456) 2011 Microsemi Corporation Page 2 of 6