1N5518B-1 thru 1N5546B-1 Qualified Levels: Low Voltage Avalanche JAN, JANTX and Available on 500 mW Zener Diodes DO-35 JANTXV commercial versions Qualified per MIL-PRF-19500/437 DESCRIPTION The 1N5518-1 thru 1N5546-1 series of 0.5 watt axial-leaded glass Zener Voltage Regulators provides a selection from 3.3 to 33 volts with tolerances ranging from plus/minus 1% to 10%. The standard tolerance is plus/minus 5% with the B suffix unless ordered otherwise. These axial-leaded glass DO-35 Zeners also feature an internal metallurgical bond. This type of bonded Zener package construction is also available in JAN, JANTX, and JANTXV military qualifications. Microsemi also offers numerous other Zener products to meet higher and lower power applications. Important: For the latest information, visit our website 1N5518B-1 thru 1N5546B-1 MECHANICAL and PACKAGING CASE: Hermetically sealed axial-lead glass DO-35 (DO-204AH) package. TERMINALS: Leads, tin-lead plated solderable per MIL-STD-750, method 2026. RoHS compliant matte-tin available for commercial only. 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. MARKING: Part number. TAPE & REEL option: Standard per EIA-296 (add TR suffix to part number). Consult factory for quantities. WEIGHT: 0.2 grams. See Package Dimensions on last page. PART NOMENCLATURE JAN 1N5518 B -1 (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 Blank = Commercial Metallurgically Bonded JEDEC type number (see Electrical Characteristics table) Zener Voltage Tolerance A = 10% B = 5% C = 2% D = 1% 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 V Voltage Regulation: The change in Zener voltage between two specified currents or percentage of I . Z 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-0037-1, Rev 1 (111456) 2011 Microsemi Corporation Page 2 of 5