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ZM4728A THRU ZM4764A
1W EPITAXIAL ZENER DIODE
FEATURES
* Low profile package * Built-in strain relief * Low inductance * High temperature soldering : 260C /10 seconds at terminals * Glass package has Underwriters Laboratory Flammability Classification * In compliance with EU RoHS 2002/95/EC directives
A
B C
MECHANICAL DATA
* Case: Molded Glass LL-41 * Terminals: Axial leads, solderable per MIL-STD-750, Method 2026 guaranteed * Polarity: Color band denotes positive end * Mounting position:Any * Weight: 0.25 gram
MELF
Dim A B C Min 4. 80 2. 40 0. 46 Max 5. 20 2. 67 0. 60
ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES)(TA=25)
Symbols Zener current see table "Characteristics" Power dissipation at TA=50 Junction temperature Storage temperature range Value Units
Ptot TJ TSTG
1
1)
W
175 -65 to +200

1)Valid provided that a distance of 8mm from case are kept at ambient temperature
ELECTRCAL CHARACTERISTICS(TA=25)
Symbols Thermal resistance junction to ambient Forward voltage at IF=200mA Min Typ Max 170 1.2
1)
Units
RthA VF
/W
V
1) Valid provided that a distance at 8mm from case are kept at ambient temperature
ZM4728A THRU ZM4764A
1W EPITAXIAL ZENER DIODE
Nominal Zener Voltage (1) V Z @ IZT V ZM4728A ZM4729A ZM4730A ZM4731A ZM4732A ZM4733A ZM4734A ZM4735A ZM4736A ZM4737A ZM4738A ZM4739A ZM4740A ZM4741A ZM4742A ZM4743A ZM4744A ZM4745A ZM4746A ZM4747A ZM4748A ZM4749A ZM4750A ZM4751A ZM4752A ZM4753A ZM4754A ZM4755A ZM4756A ZM4757A ZM4758A ZM4759A ZM4760A ZM4761A ZM4762A ZM4763A ZM4764A Notes: 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 Test Current IZT mA 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 9.0 9.0 8.0 7.0 5.0 2.0 3.5 4.0 4.5 5.0 7.0 8.0 9.0 10 14 16 20 22 23 25 35 40 45 50 60 70 80 95 110 125 150 175 200 250 350 400 400 400 400 500 550 600 700 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1000 1500 1500 1500 2000 2000 2000 2000 3000 3000 3000 Maximum Reverse Leakage Current IR A 100 100 50 10 10 10 10 10 10 10 10 10 10 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 @ VR V 1.0 1.0 1.0 1.0 1.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 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 Max Surge Current 8.3ms IZS mA 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 Maximum Zener Current IZM mA 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 9.0
Maximum Zener Impedance (2) ZZT @ IZT ZZK @ IZK IZK mA 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
Type Number
1. Measured under thermal equilibrium and DC (IZT ) test conditions. 2. 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 Zener current (IZT or I ZK) is superimposed on IZT or IZK .Zener impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units.
ZM4728A THRU ZM4764A
RATINGS AND CHARACTERISTIC CURVES
FIG.1 -- BREAKDOWN CHARACTERISTICS
Vz (V)
Iz (mA)
100 80 60 40 20 0 5 10 15 20 25 30
4750
4749
4748
4747
4744
4742
4741
4739
4735
4733 4732
4731
FIG.2 -- ADMISSIBLE POWER DISSIPATION VERSUS AMBIENT TEMPERATURE
P O W E R D I S S I PAT I O N , Wa t t s
4728
1.0 0.8 0.6 0.4 0.2
0
50
100
150
200
250
AMBIENT TEMPERATURE, O C

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