1N746AUR-1 - 1N759AUR-1, 1N4370AUR-1 - 1N4372AUR-1 Available on commercial versions Silicon MELF 500 mW Zener Diodes Qualified per MIL-PRF-19500/127 Qualified Levels: JAN, JANTX, and JANTXV DESCRIPTION This popular series of 500 mW Zener voltage regulators provides a selection from 2.4 to 12 volts in a standard 5% tolerance as well as available tighter 2% and 1% tolerances. These glass, surface mount DO-213AA Zeners feature an internal metallurgical bond and are military qualified to the JAN, JANTX, and JANTXV level. A RoHS compliant commercial grade only version is also available. Important: For the latest information, visit our website http://www.microsemi.com. FEATURES * * * * DO-213AA MELF Package JEDEC registered 1N746 through 1N759A and 1N4370 through 1N4372A series. Standard voltage tolerance is 5% with optional tighter tolerances of 2% or 1%. Internal metallurgical bond. JAN, JANTX, and JANTXV qualifications are available per MIL-PRF-19500/127. Also available in: (See part nomenclature for all available options.) * * RoHS compliant versions available (commercial grade only). These commercial surface mount equivalents were also previously identified with a CDLL or MLL prefix instead of the "1N" prefix. DO-35 (DO-204AH) package (axial-leaded) 1N746A-1 - 1N759A-1 and 1N4370A-1 - 1N4372A-1 APPLICATIONS / BENEFITS * * * * * * Regulates voltage over a broad range of temperature and current. Regulated voltage range from 2.4 to 12 V. Small size for high density mounting using the surface mount method (see package illustration). Non-sensitive to ESD per MIL-STD-750 method 1020. Minimal capacitance. Inherently radiation hard as described in Microsemi MicroNote 050. MAXIMUM RATINGS Parameters/Test Conditions Operating and Storage Temperature Thermal Resistance Junction-to-End Cap Thermal Resistance Junction-to-Ambient when (1) mounted on PCB Average Rated Power Dissipation (2) @ T EC = +125C @ T A = 55C mounted on PCB Forward Voltage @ I F = 200 mA Solder Temperature @ 10 s NOTES: Symbol T J and T STG R JEC R JA P M(AV) VF Value -65 to +175 100 300 0.5 0.4 1.1 260 Unit C C/W C/W W V C o 1. See Figure 1 for derating curves. T A = +75 C on an FR4 PC board with 1 oz copper metalization. 2. The 0.5 W linearly derates starting at T EC = 125 C and goes to zero at 175 C. For ambient T A condition on a typical PC board, it linearly derates from 400 mW starting at 55 C and goes to zero at 175 C (see Figure2). MSC - Lawrence 6 Lake Street, Lawrence, MA 01841 Tel: 1-800-446-1158 or (978) 620-2600 Fax: (978) 689-0803 MSC - Ireland Gort Road Business Park, Ennis, Co. Clare, Ireland Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298 Website: www.microsemi.com T4-LDS-0288-1, Rev. 1 (5/23/13) (c)2013 Microsemi Corporation Page 1 of 6 1N746AUR-1 - 1N759AUR-1, 1N4370AUR-1 - 1N4372AUR-1 MECHANICAL and PACKAGING * * * * * * * * CASE: Hermetically sealed glass case package. TERMINALS: Tin/lead plated or RoHS compliant matte-tin (on commercial grade only) over copper clad steel. Solderable per MIL-STD-750, method 2026. POLARITY: Cathode end is banded. MOUNTING: The axial coefficient of expansion (COE) of this device is approximately +6PPM/C. The COE of the mounting surface system should be selected to provide a suitable match with this device. MARKING: Part number. TAPE & REEL option: Standard per EIA-296. Consult factory for quantities. WEIGHT: Approximately 0.04 grams. See Package Dimensions on last page. PART NOMENCLATURE JAN 1N746 A UR -1 (e3) Reliability Level JAN = JAN level JANTX = JANTX level JANTXV = JANTXV level Blank = Commercial RoHS Compliance e3 = RoHS compliant (available on commercial grade only) Blank = non-RoHS compliant Metallurgically Bonded JEDEC type number (see Electrical Characteristics table) Surface Mount Package type Zener Voltage Tolerance A = 5% C = 2% D = 1% SYMBOLS & DEFINITIONS Definition Symbol IR I Z , I ZT , I ZK I ZM I ZSM VF VR VZ Z ZT or Z ZK Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature. Regulator Current: The dc regulator current (I Z ), at a specified test point (I ZT ), near breakdown knee (I ZK ). Maximum Regulator (Zener) Current: The maximum rated dc current for the specified power rating. Maximum Zener Surge Current: The non-repetitive peak value of Zener surge current at a specified wave form. Maximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current. Reverse Voltage: The reverse voltage dc value, no alternating component. Zener Voltage: The Zener voltage the device will exhibit at a specified current (I Z ) in its breakdown region. Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a specified rms current modulation (typically 10% of I ZT or I ZK ) and superimposed on I ZT or I ZK respectively. T4-LDS-0288-1, Rev. 1 (5/23/13) (c)2013 Microsemi Corporation Page 2 of 6 1N746AUR-1 - 1N759AUR-1, 1N4370AUR-1 - 1N4372AUR-1 ELECTRICAL CHARACTERISTICS @ 25 C JEDEC TYPE NO. (NOTE 1) 1N4370A-1 1N4371A-1 1N4372A-1 1N746A-1 1N747A-1 1N748A-1 1N749A-1 1N750A-1 1N751A-1 1N752A-1 1N753A-1 1N754A-1 1N755A-1 1N756A-1 1N757A-1 1N758A-1 1N759A-1 NOMINAL ZENER VOLTAGE V Z @ I ZT (NOTE 2) Volts 2.4 2.7 3.0 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10.0 12.0 MAXIMUM ZENER IMPEDANCE Z ZT @ I ZT (NOTE 3) Ohms 30 30 29 24 22 20 18 15 14 8 3 3 4 5 6 7 10 REVERSE VOLTAGE VR Volts 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.5 2.0 2.5 3.5 4.0 5.0 6.0 7.0 8.0 9.0 MAXIMUM REVERSE CURRENT IR @ VR @ 25 C A 100 60 30 5 3 2 2 5 5 5 5 2 2 1 1 1 1 @ +150 C A 200 150 100 30 30 30 50 50 50 50 50 50 50 50 50 50 50 MAXIMUM ZENER CURRENT I ZM (NOTE 4) mA 155 140 125 120 110 100 90 85 75 70 65 60 55 50 45 40 35 TEMPERATURE COEFFICIENT OF ZENER VOLTAGE VZ % / C -0.085 -0.080 -0.075 -0.070 -0.065 -0.060 -0.055 / +.020 -0.043 / +.025 -0.030 / +.030 -0.028 / +.036 +0.045 +0.050 +0.058 +0.062 +0.068 +0.076 +0.080 NOTES: 1 The JEDEC type numbers shown (A suffix) have a 5% tolerance on nominal Zener voltage. 2. Voltage measurements to be performed 20 seconds after application of dc test current. 3. Zener impedance derived by superimposing on I ZT , a 60 cps, rms current equal to 10% I ZT (20 mA). See MicroNote 202 for typical Zener Impedance variation with different operating currents. 4. Allowance has been made for the increase in V Z due to Z Z and for the increase in junction temperature as the unit approaches thermal equilibrium at the power dissipation of 400mW. T4-LDS-0288-1, Rev. 1 (5/23/13) (c)2013 Microsemi Corporation Page 3 of 6 1N746AUR-1 - 1N759AUR-1, 1N4370AUR-1 - 1N4372AUR-1 DC Operations Maximum Rating (mW) GRAPHS T EC (C) (End Cap) DC Operations Maximum Rating (mW) FIGURE 1 Temperature-Power Derating Curve T (PCB) (C) (PCB) FIGURE 2 Temperature-Power Derating Curve T4-LDS-0288-1, Rev. 1 (5/23/13) (c)2013 Microsemi Corporation Page 4 of 6 1N746AUR-1 - 1N759AUR-1, 1N4370AUR-1 - 1N4372AUR-1 Theta (C/W) GRAPHS (continued) Time (s) FIGURE 3 Thermal Impedance To End Cap T4-LDS-0288-1, Rev. 1 (5/23/13) (c)2013 Microsemi Corporation Page 5 of 6 1N746AUR-1 - 1N759AUR-1, 1N4370AUR-1 - 1N4372AUR-1 PACKAGE DIMENSIONS DIM BD BL ECT S INCH MIN MAX 0.063 0.067 0.130 0.146 0.016 0.022 0.001 min MILLIMETERS MIN MAX 1.60 1.70 3.30 3.71 0.41 0.56 0.03 min NOTES: 1. Dimensions are in inches. Millimeters are given for information only. 2. Dimensions are pre-solder dip. 3. Referencing to dimension S, minimum clearance of glass body to mounting surface on all orientations. 4. In accordance with ASME Y14.5M, diameters are equivalent to x symbology. PAD LAYOUT A B C T4-LDS-0288-1, Rev. 1 (5/23/13) (c)2013 Microsemi Corporation INCH 0.200 0.055 0.080 mm 5.08 1.40 2.03 Page 6 of 6