Surface Mount Zener Diodes
COMCHIP
www.comchip.com.tw
CZRL4728 Thru CZRL4764
Voltage: 3.3 - 100 Volts
Power: 1 Watt
Features
Silicon Planar Power Zener Diodes
For use in stabilizing and clipping circuits
with higher power rating.
Standard Zener voltage tolerance is
±10%. Add suffix “A” for ±5% tolerance.
Other Zener voltages and tolerances are
available upon request.
Glass MELF
(LL35)
Cathode Mark
0.102 (2.6)
0.094 (2.4)
0.022 (0.55)
0.205 (5.2)
0.189 (4.8)
Dimensions in mm
Mechanical data
Case: MELF Glass Case
Weight: approx. 0.25g
Maximum Ratings and Electrical Characterics
Parameter
Zener Current (see Table “Characteristics”)
Power Dissipation at Tamb = 25°C
Thermal Resistance Junction to Am bient Air
Junction Temperature
Storage Temperature Range
Symbol
P
tot
R
JA
Tj
T
S
Value
1.0
(1)
170
200
–65 to +200
(1)
Unit
W
°C/W
°C
°C
Note: (1) Valid provided that electrodes are kept at am bient temperature
MDS0302003A
Page 1
Surface Mount Zener Diodes
Maximum Zener Impedance
(Note 1.)
at
Z
ZT
at I
ZT
(Ohm)
10
10
9
9
8
7
5
2
3.5
4
4.5
5
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
Z
ZK
(Ohm)
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
I
ZK
(mA)
1
1
1
1
1
1
1
1
1
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
COMCHIP
www.comchip.com.tw
Type No.
Nominal
Zener
Voltage
at I
ZT
VZ (V)
(Note 3.)
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
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
6.5
6
5.5
5
4.5
4
3.7
3.3
3
2.8
2.5
Max reverse Leakage
Current
at
I
R
(uA)
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
V
R
(V)
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
62.2
69.2
76
Maximum
Surge
Regulator
Current at
Current
T
A
= 25°C
I
ZM
(mA)
Ir(mA)
(Note 2.)
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
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
CZRL4728
CZRL4729
CZRL4730
CZRL4731
CZRL4732
CZRL4733
CZRL4734
CZRL4735
CZRL4736
CZRL4737
CZRL4738
CZRL4739
CZRL4740
CZRL4741
CZRL4742
CZRL4743
CZRL4744
CZRL4745
CZRL4746
CZRL4747
CZRL4748
CZRL4749
CZRL4750
CZRL4751
CZRL4752
CZRL4753
CZRL4754
CZRL4755
CZRL4756
CZRL4757
CZRL4758
CZRL4759
CZRL4760
CZRL4761
CZRL4762
CZRL4763
CZRL4764
Notes:
(1) The Zener impedance is derived from the 1KHZ AC volt age which results when an AC current having an RMS value equal to
10% of the Zener current (IZTor IZK) is superim posed on IZT or IZK. Zener impedance is m easured 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 am bient temperature
(3) Measured under thermal equilibrium and DC test condit ions.
MDS0302003A
Page 2
Surface Mount Zener Diodes
COMCHIP
www.comchip.com.tw
Rating and Characteristic Curves (CZRL4728 Thru CZRL4764)
1.0
P
d
, POWER DISSIPATION (W)
0.8
0.6
0.4
0.2
0
0
100
T
A
, AMBIENT TEMPERATURE (°C)
Fig. 1, Power Derating Curve
200
CZRL4728~CZRL4764
MDS0302003A
Page 3
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