1N5257A Microchip

1N5221BUR-1 thru 1N5281BUR-1 Screening in METALLURGICALLY BONDED GLASS reference to Available on MIL-PRF-19500 commercial SURFACE MOUNT 500 mW ZENERS versions available DESCRIPTION The 1N5221BUR-1 thru 1N5281BUR-1 series of 0.5 watt Zener voltage regulators provides a surface mount equivalent to the popular JEDEC registered 1N5221 to 1N5281 series for 2.4 to 200 volts in a metallurgically bonded configuration. They are available with standard 5% or 10% tolerances as well as tighter tolerances identified by different suffix letters on the part number. Microsemi also offers numerous other Zener products to meet higher and lower power applications. DO-213AA Package Important: For the latest information, visit our website 1N5221BUR-1 thru 1N5281BUR-1 MECHANICAL and PACKAGING CASE: Hermetically sealed glass DO-213AA (SOD80 or MLL34) MELF style package. TERMINALS: End caps tin-lead or RoHS compliant annealed matte-tin plating (commercial grade only) solderable per MIL-STD- 750, method 2026. MARKING: Cathode band 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. TAPE & REEL option: Standard per EIA-481-B (add TR suffix to part number). Consult factory for quantities. WEIGHT: 0.04 grams. See Package Dimensions on last page. PART NOMENCLATURE MQ 1N5221 B UR -1 (e3) Reliability Level RoHS Compliance MQ (reference JAN) e3 = RoHS Compliant (available MX (reference JANTX) on commercial grade only) MV (reference JANTXV) Blank = non-RoHS Compliant MSP (reference JANS) Blank = Commercial Metallurgically Bonded JEDEC type number Surface Mount Package (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 Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating. ZM T Temperature Solder Pad: The maximum solder temperature that can be safely applied to the terminal. SP V Reverse Voltage: The reverse voltage dc value, no alternating component. R V Zener Voltage: The Zener voltage the device will exhibit at a specified current (I ) in its breakdown region. Z Z 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-0232-1, Rev. 1 (111957) 2011 Microsemi Corporation Page 2 of 6