1N4728A THRU 1N4764A
1W EPITAXIAL ZENER DIODE
FEATURES
•
Low profile package
•
Built-in strain relief
•
Low inductance
•
High temperature soldering : 260°C /10 seconds at terminals
•
Glass package has Underwriters Laboratory Flammability
Classification
•
In compliance with EU RoHS 2002/95/EC directives
DO-41(GLASS)
Φ
0.8± 0.1
•
Case: Molded Glass DO-41G
•
Terminals: Axial leads, solderable per MIL-STD-750,
Method 2026 guaranteed
•
Polarity: Color band denotes positive end
•
Mounting position:Any
•
Weight: 0.012 ounce, 0.336 gram
Φ
2.5 ± 0.2
All Dimensions in mm
ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES)(T
A
=25℃)
Symbols
Zener current see table "Characteristics"
Power dissipation at TA=50℃
Junction temperature
Storage temperature range
Value
Units
P
tot
T
J
T
STG
1
25.4 ± 1
4.5 ± 0.2
MECHANICAL DATA
25.4 ± 1
1)
W
175
-65 to +175
℃
℃
1)Valid provided that a distance of 8mm from case are kept at ambient temperature
ELECTRCAL CHARACTERISTICS(T
A
=25℃)
Symbols
Thermal resistance junction to ambient
Forward voltage at IF=200mA
Min
Typ
Max
170
1.2
1)
Units
R
thA
V
F
℃
/W
V
1) Valid provided that a distance at 8mm from case are kept at ambient temperature
1N4728A THRU 1N4764A
1W EPITAXIAL ZENER DIODE
Nominal
Zener
Test
Current
3)
Maximum Zener Impedance
at
I
ZT
Z
ZK
1)
Type
Voltage
at
Maximum
reverse leakage current
Surge
current
at
T
A
=0.25
Maximum
regulator
Current
IR
IZM
2)
at
I
ZK
at
V
R
I
ZT
V
Z
V
1N4728
1N4729
1N4730
1N4731
1N4732
1N4733
1N4734
1N4735
1N4736
1N4737
1N4738
1N4739
1N4740
1N4741
1N4742
1N4743
1N4744
1N4745
1N4746
1N4747
1N4748
1N4749
1N4750
1N4751
1N4752
1N4753
1N4754
1N4755
1N4756
1N4757
1N4758
1N4759
1N4760
1N4761
1N4762
1N4763
1N4764
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
I
ZT
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
Z
ZT
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
3000
2000
1500
1000
750
700
500
550
600
400
mA
I
R
A
100
50
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
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
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
1.0
10
5.0
0.25
5
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
Notes:1) The Zener impedance is derived from the 1KHz AC voltage which results when an AC current having an RMS calue equal to 10% of the 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 to eliminate unstable units.
2) Valid provided that electrodes at a distance of 10mm from case are kept at ambient temperature
3) Measured under thermal equilibriun and DC test conditions.
1N4728A THRU 1N4764A
RATINGS AND CHARACTERISTIC CURVES
FIG.1 -- BREAKDOWN CHARACTERISTICS
100
mA
5
10
15
20
25
30 V
I
Z
80
60
40
20
0
FIG.2 -- ADMISSIBLE POWER DISSIPATION VERSUS AMBIENT TEMPERATURE
W
1.0
1N4728
1N4733
1N4735
1N4742
1N4744
1N4747
1N4731
1N4732
1N4739
1N4741
1N4748
1N4749
1N4750
V
Z
0.8
P
tot
0.6
0.4
0.2
0
0
100
T
amb
200℃
嵌入式系统
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