1N746 thru 1N759A, -1 and 1N4370 thru 1N4372A, -1 DO-35 Silicon 500 mW Zener Diodes SCOTTSDALE DIVISION APPEARANCE The popular 1N746 thru 1N759A and 1N4370 thru 1N4372A series of 0.5 watt Zener Voltage Regulators provides a selection from 2.4 to 12 volts in standard 5% or 10% tolerances as well as tighter tolerances identified by different suffix letters on the part number. These glass axial-leaded DO-35 Zeners are also available with an internal-metallurgical-bond option by adding a “-1” suffix. These are also available in JAN, JANTX, and JANTXV military qualifications. Microsemi also offers numerous other Zener products to meet higher and lower power applications. DO-35 (DO-204AH) IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com FEATURES APPLICATIONS / BENEFITS • JEDEC registered 1N746 thru 1N759A and 1N4370 thru 1N4372A series • Internal metallurgical bond option available by adding a “-1” suffix • Also available in JAN, JANTX, and JANTXV qualifications per MIL-PRF-19500/127 by adding the JAN, JANTX, or JANTXV prefixes to part numbers for desired level of screening as well as –1” suffix; (e.g. JANTX1N751A-1, JANTXV1N758C-1, etc.) • Military Surface Mount equivalents also available in DO-213AA by adding a UR-1 suffix in addition to the JAN, JANTX, and JANTXV prefix; e.g. JANTX1N962BUR-1 (see separate data sheet) • Commercial Surface Mount equivalents available as MLL746 to MLL759A and MLL4370 to MLL4372A including the “-1” suffix in the DO-213AA MELF style package (consult factory for others) • DO-7 glass body axial-leaded Zener equivalents are also available MAXIMUM RATINGS • • • • • • • • Regulates voltage over a broad operating current and temperature range Selection from 2.4 to 12 V Standard voltage tolerances are plus/minus 5% with A suffix identification and 10 % with no suffix Tight tolerances available in plus or minus 2% or 1% with C or D suffix respectively Flexible axial-lead mounting terminals Nonsensitive to ESD per MIL-STD-750 Method 1020 Minimal capacitance (see Figure 3) Inherently radiation hard as described in Microsemi MicroNote 050 MECHANICAL AND PACKAGING º º • • • • • • • CASE: Hermetically sealed axial-lead glass DO-35 (DO-204AH) package TERMINALS: Leads, tin-lead plated solderable per MIL-STD-750, method 2026 POLARITY: Cathode indicated by band. Diode 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) WEIGHT: 0.2 grams See package dimensions on last page Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 1 1N746 –759A 1N4370 – 4372A (DO-35) • Operating and Storage temperature: -65 C to +175 C • Thermal Resistance: 250 ºC/W junction to lead at 3/8 (10 mm) lead length from body, or 310ºC/W junction to ambient when mounted on FR4 PC board (1 oz Cu) with 4 mm2 copper pads and track width 1 mm, length 25 mm • Steady-State Power: 0.5 watts at TL < 50oC 3/8 inch (10 mm) from body or 0.48 W at TA < 25ºC when mounted on FR4 PC board as described for thermal resistance above (also see Figure1) • Forward voltage @200 mA: 1.1 volts • Solder Temperatures: 260 ºC for 10 s (max) Copyright 2003 10-31-2003 REV B WWW . Microsemi .C OM DESCRIPTION 1N746 thru 1N759A, -1 and 1N4370 thru 1N4372A, -1 DO-35 Silicon 500 mW Zener Diodes SCOTTSDALE DIVISION JEDEC TYPE NO. (NOTE1) 1N4370 1N4371 1N4372 1N746 1N747 1N748 1N749 1N750 1N751 1N752 1N753 1N754 1N755 1N756 1N757 1N758 1N759 NOMINAL ZENER VOLTAGE VZ @ IZT (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 ZENER TEST CURRENT IZT mA 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 MAXIMUM REVERSE CURRENT IR @ VR = 1 VOLT MAXIMUM ZENER IMPEDANCE ZZT @ IZT (NOTE 3) OHMS 30 30 29 28 24 23 22 19 17 11 7 5 6 8 10 17 30 @25ºC µA 100 75 50 10 10 10 2 2 1 1 .1 .1 .1 .1 .1 .1 .1 @+150ºC µA 200 150 100 30 30 30 30 30 20 20 20 20 20 20 20 20 20 MAXIMUM ZENER CURRENT IZM (NOTE 4) mA 150 135 120 110 100 95 85 75 70 65 60 55 50 45 40 35 30 TYPICAL TEMP COEFF. OF ZENER VOLTAGE αVZ o %/ C -.085 -.080 -.075 -.066 -.058 -.046 -.033 -.015 +/-.010 +.030 +.049 +.053 +.057 +.060 +.061 +.062 +.062 WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS* @ 25oC * JEDEC Registered Data NOTE 1: Standard tolerance on JEDEC types shown is +/- 10%. Suffix letter A denotes +/- 5% tolerance; suffix letter C denotes +/- 2%; and suffix letter D denotes +/- 1% tolerance. NOTE 2: Voltage measurements to be performed 20 seconds after application of dc test current. NOTE 3: Zener impedance derived by superimposing on IZT, a 60 cps, rms ac current equal to 10% IZT (2mA ac). See MicroNote 202 for typical zener Impedance variation with different operating currents. NOTE 4: Allowance has been made for the increase in VZ due to ZZ and for the increase in junction temperature as the unit approaches thermal equilibrium at the power dissipation of 400 mW. TEMPERATURE COEFFICIENT %/ºC NOMINAL ZENER VOLTAGE (VOLTS) FIGURE 1 POWER DERATING CURVE Copyright 2003 10-31-2003 REV B o o TL – LEAD TEMPERATURE ( C) 3/8” FROM BODY or TA on FR4 PC BOARD 1N746 –759A 1N4370 – 4372A (DO-35) TEMPERATURE COEFFICIENT mV/ C RATED POWER DISSIPATION - mW GRAPHS FIGURE 2 ZENER VOLTAGE TEMPERATURE COEFFICIENT vs. ZENER VOLTAGE Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2 1N746 thru 1N759A, -1 and 1N4370 thru 1N4372A, -1 DO-35 Silicon 500 mW Zener Diodes SCOTTSDALE DIVISION WWW . Microsemi .C OM PACKAGE DIMENSIONS All dimensions in: INCH mm FIGURE 3 CAPACITANCE vs. ZENER VOLTAGE (TYPICAL) 1N746 –759A 1N4370 – 4372A (DO-35) Copyright 2003 10-31-2003 REV B Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 3