1N2804B 1N2846RB and 1N4557B 1N4564RB Qualified Levels: JAN, JANTX, and 50 Watt Zener Diodes Available on JANTXV commercial Qualified per MIL-PRF-19500/114 versions DESCRIPTION This series of high power 50W Zener diodes, JEDEC registered 1N2804B through 1N2846B and 1N4557B through 1N4564B, provide voltage regulation in values from 3.9 V to 200 V broad range of voltages. They may be operated up to 50 W with adequate mounting and heat sinking due to their low thermal resistance. These Zeners are also available in reverse polarity. On select part numbers, these Zeners are also available in JAN, JANTX, and JANTXV military qualifications. TO-204AD (TO-3) Package Important: For the latest information, visit our website 1N2804B 1N2846RB and 1N4557B 1N4564RB MECHANICAL and PACKAGING CASE: Industry standard TO-3 (TO-204AD), hermetically sealed, 0.052 inch diameter pins. FINISH: Solder dipped tin-lead over nickel plated alloy 52. Solderable per MIL-STD-750 method 2026. RoHS compliant matte- tin plating is also available on commercial grade only. POLARITY: Standard polarity units are connected anode to case. Reverse polarity (cathode to case) is indicated by suffix R. In either example, both pins are common with one another as anode or cathode (see Figure 2). WEIGHT: Approximately 15 grams. MOUNTING HARDWARE: Consult factory for optional insulator and sheet metal screws. See Package Dimensions on last page. PART NOMENCLATURE JAN 1N2804 R B 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 *(on select part numbers) Zener Voltage Tolerance A = 10% JEDEC type number B = 5% (see Electrical C = 2% Characteristics table) D = 1% Polarity R = reverse polarity (Cathode to Case) Blank = standard polarity (Anode to Case) 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 V Reverse Voltage: The reverse voltage dc value, no alternating component. R V Maximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current. F 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-0076, Rev. 3 (5/2/13) 2013 Microsemi Corporation Page 2 of 7