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1N4728UR thru 1N4764AUR (or MLL4728A thru MLL4764A)
SCOTTSDALE DIVISION
SURFACE MOUNT 1.0 W GLASS ZENER DIODES
DESCRIPTION This surface mountable 1 watt Zener diode series is electrically equivalent to the 1N4728A thru 1N4764A registration in the DO-41 equivalent package except that it meets the JEDEC surface mount outline DO-213AB. It is an ideal selection for applications of high density and low parasitic requirements for voltage regulation. Standard voltage tolerance is +/- 5% with tighter tolerances available down to 1%. With its glass hermetic qualities, it may also be used for high reliability applications when required by a source control drawing (SCD).
IMPORTANT: For the most current data, consult MICROSEMI's website: http://www.microsemi.com
APPEARANCE
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DO-213AB
FEATURES
* * * * * Electrically similar to the JEDEC registered 1N4728 thru 1N4764 zener series Zener voltages available 3.3V to 100V Standard voltage tolerances are +/- 5% with "A" suffix and 10 % with no suffix identification Tight tolerances available in plus or minus 2% or 1% with C or D suffix respectively Options for screening in accordance with MIL-PRF19500 for JAN, JANTX, JANTXV, and JANS are available by adding MQ, MX, MV, or MSP prefixes respectively to part numbers. Surface mount equivalents also available as SMAJ4728A to SMAJ4764A and SMAJ4728A to SMAJ4764A Plastic body axial-leaded Zener equivalents are also available as 1N4728A to 1N4764A * * * * * * * *
APPLICATIONS / BENEFITS
Regulates voltage over a broad operating current and temperature range Wide selection from 3.3 to 100 V Leadless package for surface mounting Ideal for high density mounting Nonsensitive to ESD Hermetically sealed glass package Specified capacitance (see Figure 2) Inherently radiation hard per MicroNote 050
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MAXIMUM RATINGS
* * * Power dissipation at 25 C: 1.0 watts (also see derating in Figure 1). Operating and Storage temperature: -65C to +175C Thermal Resistance: 50 C/W junction to end cap, or 130C/W junction to ambient when mounted on FR4 PC board (1 oz Cu) with recommended footprint (see last page) Steady-State Power: 1.00 watts at TEC < 125oC, or 1.00 watts at TA < 45C when mounted on FR4 PC board and recommended footprint as described for thermal resistance (also see Figure 1) Forward voltage @200 mA: 1.2 volts (maximum) Solder Temperatures: 260 C for 10 s (max)
MECHANICAL AND PACKAGING
* CASE: Hermetically sealed DO-213AB glass MELF * 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: Cathode band only * TAPE & REEL optional: Standard per EIA-481-B with 12 mm tape, 1500 per 7 inch reel or 5000 per 13 inch reel (add "TR" suffix to part number) * WEIGHT: 0.05 grams * See package dimensions & recommended mounting pad on last page
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1N4728AUR thru 1N4764AUR
* *
Copyright 2002 11-05-2003 REV C
Microsemi
Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
1N4728UR thru 1N4764AUR (or MLL4728A thru MLL4764A)
SCOTTSDALE DIVISION
SURFACE MOUNT 1.0 W GLASS ZENER DIODES
ELECTRICAL CHARACTERISTICS @
ZENER VOLTAGE (NOTE 4) VZ
Volts
TC
= 30oC
MAXIMUM REVERSE CURRENT IR @ VR
A
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TEST CURRENT IZT
mA
TYPE NUMBER (NOTE 1 & 5)
MAXIMUM DYNAMIC IMPEDANCE (Note 2) ZZT @ IZT
Ohms
TEST VOLTAGE VR
Volts
MAXIMUM REGULATOR CURRENT TA = 50oC IZM
mA
MAXIMUM KNEE IMPEDANCE (NOTE2) ZZK @ IZK
Ohms
TEST CURRENT IZK
mA
MAXIMUM (SURGE) CURRENT (NOTE 3) IS
mA
1N4728AUR 1N4729AUR 1N4730AUR 1N4731AUR 1N4732AUR 1N4733AUR 1N4734AUR 1N4735AUR 1N4736AUR 1N4737AUR 1N4738AUR 1N4739AUR 1N4740AUR 1N4741AUR 1N4742AUR 1N4743AUR 1N4744AUR 1N4745AUR 1N4746AUR 1N4747AUR 1N4748AUR 1N4749AUR 1N4750AUR 1N4751AUR 1N4752AUR 1N4753AUR 1N4754AUR 1N4755AUR 1N4756AUR 1N4757AUR 1N4758AUR 1N4759AUR 1N4760AUR 1N4761AUR 1N4762AUR 1N4763AUR 1N4764AUR
NOTE 1: NOTE 2: NOTE 3: NOTE 4: NOTE 5:
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 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91 100
76 69 64 58 53 49 45 41 37 34 31 28 25 23 21 19 17 15.5 14 12.5 11.5 10.5 9.5 8.5 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.7 3.3 3.0 2.8 2.5
10 10 9 9 8 7 5 2 3.5 4.0 4.5 5.0 7 8 9 10 14 16 20 22 23 25 35 40 45 50 60 70 80 95 110 125 150 175 200 250 350
100 100 50 10 10 10 10 10 10 10 10 10 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 1 1 1 1 1 2 3 4 5 6 7 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 22.8 25.1 27.4 29.7 32.7 35.8 38.8 42.6 47.1 51.7 56.0 62.2 69.2 76.0
276 252 234 217 193 178 162 146 133 121 110 100 91 83 76 69 61 57 50 45 41 38 34 30 27 25 23 22 19 18 16 14 13 12 11 10 9
400 400 400 400 500 550 600 700 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1000 1500 1500 1500 2000 2000 2000 2000 3000 3000 3000
1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
1380 1260 1190 1070 970 890 810 730 660 605 550 500 454 414 380 344 304 285 250 225 205 190 170 150 135 125 115 110 95 90 80 70 65 60 55 50 45
The type numbers shown with an "A" suffix have a +/-5% tolerance on the nominal Zener voltage. Also available with suffix "C" for +/-2%, and "D" for +/-1%, while the absence of a suffix letter denotes +/- 10% tolerance. The Zener impedance is derived from the 60Hz ac voltage, which results when an ac current having an rms value equal to 10% of the dc Zener current (IZT or IZK) is superimposed on IZT or IZK. Zener impedance is measured at two points to ensure a sharp knee on the breakdown curve and eliminate unstable units. The reverse surge current is measured at 25oC ambient using a 1/2 square wave or equivalent sine wave pulse 1/120 second duration superimposed on IZT. Voltage measurements to be performed 90 seconds after application of dc current. This product series has also been previously identified as the MLL4728A thru MLL4764A series. This alternate name may still be used.
1N4728AUR thru 1N4764AUR
Copyright 2002 11-05-2003 REV C
Microsemi
Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
1N4728UR thru 1N4764AUR (or MLL4728A thru MLL4764A)
SCOTTSDALE DIVISION
SURFACE MOUNT 1.0 W GLASS ZENER DIODES
GRAPHS
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STEADY-STATE POWER DERATING
PD Power Dissipation (WATTS)
TEC
TA
Temperature (oC) FIGURE 1
Power Derating Curve Where TEC is End Cap Temp and TA is Ambient Temperature on FR4 PC board.
FIGURE 2
PACKAGE DIMENSIONS
1N4728AUR thru 1N4764AUR
DIM A B C
INCHES MIN MAX 0.094 0.105 0.189 0.205 0.016 0.022
MILLIMETERS MIN MAX 2.39 2.66 4.80 5.20 0.41 0.55
PAD LAYOUT
A B C INCHES .276 0.070 0.110 mm 7.00 1.8 2.8
Copyright 2002 11-05-2003 REV C
Microsemi
Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3

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