BZX79B Series
Zener diode
Features
High reliability
Applications
Voltage stabilization
Absolute Maximum Ratings
T
j
=25℃
Parameter
Power dissipation
Z-current
Junction temperature
Storage temperature range
Test Conditions
I=4mm T
L
≤25℃
Type
Symbol
P
V
I
Z
T
j
T
stg
Value
500
P
V
/V
Z
175
-65~+175
Unit
mW
mA
℃
℃
Maximum Thermal Resistance
T
j
=25℃
Parameter
Junction ambient
Test Conditions
I=4mm T
L
=constant
Symbol
R
thJA
Value
350
Unit
K/W
Stresses exceeding maximum ratings may damage the device. Maximum ratings are stress ratings only. Functional operation above the
recommended operating conditions is not implied. Extended exposure to stresses above the recommended operating conditions may
affect device reliability.
Electrical Characteristics
T
j
=25℃
Parameter
Forward voltage
Test Conditions
I
F
=10mA
Type
Symbol
V
F
Min
Typ
Max
0.9
Unit
V
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Rev. 3f, 1-Jun-2008
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BZX79B Series
Type
BZX79B
2V4
2V7
3V0
3V3
3V6
3V9
4V3
4V7
5V1
5V6
6V2
6V8
7V5
8V2
9V1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
1)
V
Znom
V
2.4
2.7
3.0
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
I
ZT
for V
ZT
and
mA
V
5
2.35~2.45
5
2.65~2.75
5
2.94~3.06
5
3.23~3.37
5
3.53~3.67
5
3.82~3.98
5
4.21~4.39
5
4.61~4.79
5
5.00~5.20
5
5.49~5.71
5
6.08~6.32
5
6.66~6.94
5
7.35~7.65
5
8.04~8.36
5
8.92~9.28
5
9.8~10.2
5
10.8~11.2
5
11.8~12.2
5
12.7~13.3
5
14.7~15.3
5
15.7~16.3
5
17.6~18.4
5
19.6~20.4
5
21.6~22.4
5
23.5~24.5
2
26.5~27.5
2
29.4~30.6
2
32.3~33.7
2
35.3~36.7
2
38.2~39.8
2
42.1~43.9
2
46.1~47.9
2
50.0~52.0
2
54.9~57.1
2
60.8~63.2
2
66.6~69.4
2
73.5~76.5
r
zjT
Ω
<100
<100
<95
<95
<90
<90
<90
<80
<60
<40
<10
<15
<15
<15
<20
<20
<20
<25
<30
<30
<40
<45
<55
<55
<70
<80
<80
<80
<90
<130
<150
<170
<180
<200
<215
<240
<255
r
zjK
at
Ω
<600
<600
<600
<600
<600
<600
<600
<500
<480
<400
<150
<80
<80
<80
<100
<150
<150
<150
<170
<200
<200
<225
<225
<250
<250
<300
1)
<300
1)
<325
1)
<350
1)
<350
1)
<375
1)
<375
1)
<400
1)
<425
1)
<450
1)
<475
1)
<500
1)
I
ZK
mA
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
I
R
and I
R
at V
R
µA
V
<50
1
<20
1
<10
1
<5
1
<5
1
<3
1
<3
1
<3
1
<2
1
<1
1
<3
2
<2
3
<1
5
<0.7
6
<0.5
7
<0.2
7.5
<0.1
8.5
<0.1
9
<0.1
10
<0.05
11
<0.05
12
<0.05
13
<0.05
15
<0.05
16
<0.05
18
<0.05
20
<0.05
22
<0.05
24
<0.05
27
<0.05
28
<0.05
32
<0.05
35
<0.05
38
<0.05
39
<0.05
43
<0.05
48
<0.05
53
TK
VZ
%/K
-0.09~-0.06
-0.09~-0.06
-0.08~-0.05
-0.08~-0.05
-0.08~-0.05
-0.08~-0.05
-0.06~-0.03
-0.05~+0.02
-0.02~+0.02
-0.05~+0.05
0.03~0.06
0.03~0.07
0.03~0.07
0.03~0.08
0.03~0.09
0.03~0.1
0.03~0.11
0.03~0.11
0.03~0.11
0.03~0.11
0.03~0.11
0.03~0.11
0.03~0.11
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
0.04~0.12
at Iz=2.0mA
Excel Semiconductor
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Rev. 3f, 1-Jun-2008
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BZX79B Series
Characteristics
(T
j
=25℃ unless otherwise specified)
Figure 1.
Typical Thermal Resistance
Figure 2. Typical Forward Characteristics
Figure 3. Temperature coefficients
(-55℃ to +150℃ temperature range; 90% of the units are in the ranges indicated.)
Figure 4. Effect of zener current on zener impedance
Figure 5. Effect of zener voltage on zener impedance
Excel Semiconductor
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Rev. 3f, 1-Jun-2008
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BZX79B Series
Figure 6. Zener Voltage versus Zener Current – Vz=1 thru 16 Volts
Figure 7. Zener Voltage versus Zener Current – Vz=15 thru 30 Volts
Excel Semiconductor
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FaxBack +86-512-66607370
Rev. 3f, 1-Jun-2008
4/6
BZX79B Series
Figure 8. Zener Voltage versus Zener Current – Vz=30 thru 75 Volts
Excel Semiconductor
www.excel-semi.com
FaxBack +86-512-66607370
Rev. 3f, 1-Jun-2008
5/6
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