Features
Hermetic Glass Package
Silicon Planar Zener Diodes
Mechanical Data
Case: DO-41 Glass Package
Weight: 0.309 grams (Approx.)
Maximum Ratings
Operating Temperature: -65oC to +200oC
Storage Temperature: -65oC to +200oC
For capacitive load, derate current by 20%
Electrical Characteristics @ 25oC Unless Otherwise Specified
Note: (1) Valid provided that electrodes at a distance
of 10mm from case are kept at ambient
temperature.
1N4728A
THRU
1N476
1.0 Watt
Zener Diode
3.3 to 75 Volts
A
B
C
D
D
Cathode
Mark
DO-41G
Micro Commercial Components
20736 Marilla Street Chatsworth
CA 91311
Phone: (818) 701-4933
Fax: (818) 701-4933
M C C
DC Power
Dissipation Pd 1.0W TA50OC
Forward
Thermal
Resistance RthJA 100K/W Note 1
Power Derating
from 100oCPtot 10mW/oC
TM
Micro Commercial Components
Marking : Cathode band and type number
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1N4728
THRU
1N4761A
Voltage VF1.2V
Drop
Revision: B 2012/08/23
Lead Free Finish/Rohs Compliant (Note2) ("P"Suffix designates
Compliant. See ordering information)
(2). Lead in Glass Exemption Applied, see EU Directive Annex 7(C)-I.
----- -----4.50
0.177
MIN MAX MIN M A X
A
DIMENSIONS
DIM
IN CHES M M
NOTE
----- -----
C 0.02 6 0.03 4 0.70 0.90 Di ameter
D 1.00 0 ----- 25.40 -----
B2.80
0.110 Diameter
Moisture Sensitivity: Level 1
NOT RECOMMENDED FOR NEW DESIGNS
Note 1: The JEDEC type number shown with an A suffix have a 5% tolerance on nominal zener voltage.
C signifies 2%.
2: The Zener impedance is derived from the 60 Hz 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 insure a sharp knee on the breakdown curve and eliminate
unstable units.
3: 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.
4: Voltage measurements tobe performed 90 seconds after application of DC current.
MCC
5: RoHs Compliant already and Pb-free sticker on reel , box & carton indicated RoHs compliant .
MCC Zener Test Surge Maximum
Part Number Voltage Current Current Regulator
Current
VZ @IZT IZT ZZT @IZT ZZK @IZK IZK IR @VRVRIRIZM
Volts mA OHMS OHMS mA
µA
Volts mA mA
1N4728A3.37610400110011380276
1N4729A3.66910400110011260252
1N4730A3.964940015011190234
1N4731A4.358940011011070217
1N4732A4.75385001101970193
1N4733A5.14975501101890178
1N4734A5.64556001102810162
1N4735A6.24127001103730146
1N4736A6.8373.57001104660133
1N4737A7.53447000.5105605121
1N4738A8.2314.57000.5106550110
1N4739A9.12857000.5107500100
1N4740A102577000.25107.645491
1N4741A112387000.2558.441483
1N4742A122197000.2559.138076
1N4743A1319107000.2559.934469
1N4744A1517147000.25511.430461
1N4745A1615.5167000.25512.228557
1N4746A1814207500.25513.725050
1N4747A2012.5227500.25515.222545
1N4748A2211.5237500.25516.720541
1N4749A2410.5257500.25518.219038
1N4750A279.5357500.25520.617034
1N4751A308.54010000.25522.815030
1N4752A337.54510000.25525.113527
1N4753A3675010000.25527.412525
1N4754A396.56010000.25529.711523
1N4755A4367015000.25532.711022
1N4756A475.58015000.25535.89519
1N4757A5159515000.25538.89018
1N4758A564.511020000.25542.68016
1N4759A62412520000.25547.17014
1N4760A683.715020000.25551.76513
1N4761A753.317520000.255566012
Leakage Current
Maximum ReverseMaximum Dynamic Impedance
Electrical Characteristics(TA= 25°C unless otherwise noted). Maximum VF= 1.2V at IF= 200mA
1N4728A thru 1N4761A
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Revision: B 2012/08/23
1N4728A thru 1N4761A
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Figure 3. Effect of Zener Current
on Zener Impedance Figure 4. Effect of Zener Voltage
on Zener Impedance
1000
500
200
100
50
20
10
5
2
10.1 0.2 0.5 1 2 5 10 20 50 100
IZ, ZENER CURRENT (mA)
ZZ, DYNAMIC IMPEDANCE (OHMS)
1000
700
500
200
100
70
50
20
10
7
5
2
11 2 100
VZ, ZENER CURRENT (mA)
3 5 7 10 20 30 50 70
ZZ, DYNAMIC IMPEDANCE (OHMS)
TJ = 25
°
C
iZ(rms) = 0.1 IZ(dc)
f = 60 Hz
6.2 V
27 V
VZ = 2.7 V
47 V
TJ = 25
°
C
iZ(rms) = 0.1 IZ(dc)
f = 60 Hz
20 mA
5 mA
IZ = 1 mA
Figure 1. Typical Thermal Resistance
versus Lead Length Figure 2. Effect of Zener Current
175
150
125
100
75
50
25
00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
L, LEAD LENGTH TO HEAT SINK (INCHES)
θ
JL , JUNCTION-TO-LEAD THERMAL RESISTANCE (mV/
°
C/W)
θ
VZ, TEMPERATURE COEFFICIENT (mV/
°
C)
+6
+4
+2
0
–2
–4 3 4 5 6 7 8
VZ, ZENER VOLTAGE (VOLTS)
VZ@ IZ
TA= 25
°
C
20 mA
0.01 mA
1 mA
NOTE: BELOW 3 VOLTS AND ABOVE 8 VOLTS
NOTE: CHANGES IN ZENER CURRENT DO NOT
NOTE: EFFECT TEMPERATURE COEFFICIENTS
Figure 5. Maximum Surge Power
100
70
50
30
20
10
7
5
3
2
10.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 100 200 500 1000
PW, PULSE WIDTH (ms)
This graph represents 90 percentile data points.
For worst case design characteristics, multiply surge power by 2/3.
Ppk, PEAK SURGE POWER (WATTS)
11 V–100 V NONREPETITIVE
3.3 V–10 V NONREPETITIVE
5% DUTY CYCLE
10% DUTY CYCLE
20% DUTY CYCLE
RECTANGULAR
WAVEFORM
TJ= 25
°
C PRIOR TO
INITIAL PULSE
Revision: B 2012/08/23
MCC
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Micro Commercial Components
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Revision: B 2012/08/23
3
Device Packing
Part Number-TP Tape&Reel: 5Kpcs/Reel
Part Number-AP Ammo Packing: 2.5Kpcs/Ammo Box
Part Number-BP Bulk: 50Kpcs/Carton
Ordering Information :
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make corrections, modifications , enhancements , improvements , or other changes . Micro Commercial Components
Corp . does not assume any liability arising out of the application or use of any product described herein; neither does it
convey any license under its patent rights ,nor the rights of others . The user of products in such applications shall assume all
risks of such use and will agree to hold Micro Commercial Components Corp . and all the companies whose products are
represented on our website, harmless against all damages.
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MCC's products are not authorized for use as critical components in life support devices or systems without the express written
approval of Micro Commercial Components Corporation.
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