Surface Mount Zener Diodes
*500mw Power Dissipation
*General Purpose
*Ideal for Surface Mountted Application
*Case : MICRO-MELF Glass Case
*Weight : Approx 0.01g
Features:
Mechanical Data:
Unit:mm
SMALL SIGNAL
ZENER DIODES
0.5 WATTS
A
B
A
B
C
1.20
1.30
1.35
2.0
1.8
1.35
MICRO-MELF
MICRO-MELF
MICRO-MELF Outline Dimensions
Dim
Min
Max
BZM55C Series
C
R2.5
Glass
Lead(Pb)-Free
P b
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1/5
12-Aug-05
WEITRON
Maximum Ratings and Electrical Characteristics
(T
A
=25C Unless Otherwise Noted)
Characteristics
Symbol
Unit
V
C/W
C
C
RJA
P
D
V
F
T
STG
Value
500
500
1.5
-65 to+175
mW
Power Dissipation, R
JA
300C/W
I
Z
P
D
/V
Z
mA
Z-Current
Thermal Resistance Junction to Ambient
(1)
Forward Voltage @ IF=200mA
Storage Temperature Range
Note: 1.On pc board 50 mm x 50mm x 1.6mm
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2/5
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BZM55C Series
Operation Junction Temperature Range
T
J
175
Electrical Characteristics
(T
A
=25 C unless otherwise noted, V
F
=1.5 V Max. @I
F
=200mA for all types)
Type
V
Znom
I
ZT
for V
ZT
and r
zjT
r
zjk
at I
ZK
I
R
and I
R
at V
R
TK
VZ
BZM55C...
V
mA
V
1)
mA
A
A
2)
V
%/K
2 V 4
2.4
5
2.28 to 2.56
< 85
< 600
1
< 100
< 50
1
0.09 to 0.06
2 V 7
2.7
5
2.5 to 2.9
< 85
< 600
1
< 10
< 50
1
0.09 to 0.06
3 V 0
3.0
5
2.8 to 3.2
< 90
< 600
1
< 4
< 40
1
0.08 to 0.05
3 V 3
3.3
5
3.1 to 3.5
< 90
< 600
1
< 2
< 40
1
0.08 to 0.05
3 V 6
3.6
5
3.4 to 3.8
< 90
< 600
1
< 2
< 40
1
0.08 to 0.05
3 V 9
3.9
5
3.7 to 4.1
< 90
< 600
1
< 2
< 40
1
0.08 to 0.05
4 V 3
4.3
5
4.0 to 4.6
< 90
< 600
1
< 1
< 20
1
0.06 to 0.03
4 V 7
4.7
5
4.4 to 5.0
< 80
< 600
1
< 0.5
< 10
1
0.05 to +0.02
5 V 1
5.1
5
4.8 to 5.4
< 60
< 550
1
< 0.1
< 2
1
0.02 to +0.02
5 V 6
5.6
5
5.2 to 6.0
< 40
< 450
1
< 0.1
< 2
1
0.05 to +0,05
6 V 2
6.2
5
5.8 to 6.6
< 10
< 200
1
< 0.1
< 2
2
0.03 to 0.06
6 V 8
6.8
5
6.4 to 7.2
< 8
< 150
1
< 0.1
< 2
3
0.03 to 0.07
7 V 5
7.5
5
7.0 to 7.9
< 7
< 50
1
< 0.1
< 2
5
0.03 to 0.07
8 V 2
8.2
5
7.7 to 8.7
< 7
< 50
1
< 0.1
< 2
6.2
0.03 to 0.08
9 V 1
9.1
5
8.5 to 9.6
< 10
< 50
1
< 0.1
< 2
6.8
0.03 to 0.09
10
10
5
9.4 to 10.6
< 15
< 70
1
< 0.1
< 2
7.5
0.03 to 0.1
11
11
5
10.4 to 11.6
< 20
< 70
1
< 0.1
< 2
8.2
0.03 to 0.11
12
12
5
11.4 to 12.7
< 20
< 90
1
< 0.1
< 2
9.1
0.03 to 0.11
13
13
5
12.4 to 14.1
< 26
< 110
1
< 0.1
< 2
10
0.03 to 0.11
15
15
5
13.8 to 15.6
< 30
< 110
1
< 0.1
< 2
11
0.03 to 0.11
16
16
5
15.3 to 17.1
< 40
< 170
1
< 0.1
< 2
12
0.03 to 0.11
18
18
5
16.8 to 19.1
< 50
< 170
1
< 0.1
< 2
13
0.03 to 0.11
20
20
5
18.8 to 21.2
< 55
< 220
1
< 0.1
< 2
15
0.03 to 0.11
22
22
5
20.8 to 23.3
< 55
< 220
1
< 0.1
< 2
16
0.04 to 0.12
24
24
5
22.8 to 25.6
< 80
< 220
1
< 0.1
< 2
18
0.04 to 0.12
27
27
5
25.1 to 28.9
< 80
< 220
1
< 0.1
< 2
20
0.04 to 0.12
30
30
5
28 to 32
< 80
< 220
1
< 0.1
< 2
22
0.04 to 0.12
33
33
5
31 to 35
< 80
< 220
1
< 0.1
< 2
24
0.04 to 0.12
36
36
5
34 to 38
< 80
< 220
1
< 0.1
< 2
27
0.04 to 0.12
39
39
2.5
37 to 41
< 90
< 500
1
< 0.1
< 5
30
0.04 to 0.12
43
43
2.5
40 to 46
< 90
< 600
0.5
< 0.1
< 5
33
0.04 to 0.12
47
47
2.5
44 to 50
< 110
< 700
0.5
< 0.1
< 5
36
0.04 to 0.12
51
51
2.5
48 to 54
< 125
< 700
0.5
< 0.1
< 10
39
0.04 to 0.12
56
56
2.5
52 to 60
< 135
< 1000
0.5
< 0.1
< 10
43
0.04 to 0.12
62
62
2.5
58 to 66
< 150
< 1000
0.5
< 0.1
< 10
47
0.04 to 0.12
68
68
2.5
64 to 72
< 200
< 1000
0.5
< 0.1
< 10
51
0.04 to 0.12
75
75
2.5
70 to 79
< 250
< 1500
0.5
< 0.1
< 10
56
0.04 to 0.12
1)
Tighter tolerances available request:
BZM55A... 1% OF V
Znom
BZM55B... 2% OF V
Znom
BZM55F... 3% OF V
Znom
2)
at T
j
= 150 C
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BZM55C Series
Characteristics(T
A
=25C unless otherwise specified)
0
40
80
120
160
0
100
300
400
500
600
)
W
m
(
n
o
i
t
a
p
i
s
s
i
D
r
e
w
o
P
l
a
t
o
T
P
t
o
t
T
amb
Ambient Temperature ( C )
200
200
Fig.1 Total Power Dissipation vs.
Ambient Temperature
0
5
10
15
20
1
10
100
1000
)
V
m
(
e
g
n
a
h
C
e
g
a
t
l
o
V
V
Z
V
Z
Z-Voltage ( V )
25
I
Z
=5mA
T
j
=25C
Fig.3 Typical Change of Working Voltage
under Operating Conditions at T
amb
=25 C
60
0
60
120
180
0.8
0.9
1.0
1.1
1.2
1.3
e
g
n
a
h
C
e
g
a
t
l
o
V
e
v
i
t
a
l
e
R
V
n
t
Z
T
j
Junction Temperature ( C )
240
V
Ztn
=V
Zt
/V
Z
(25C)
TK
VZ
=10 10
4
/K
8 10
4
/K
4 10
4
/K
6 10
4
/K
4 10
4
/K
2 10
4
/K
2 10
4
/K
0
Fig.2 Typical Change of Working Voltage vs.
Junction Temperature
0
10
20
30
5
0
5
10
15
K
/
0
1
(
V
f
o
t
n
e
i
c
i
f
f
e
o
C
e
r
u
t
a
r
e
p
m
e
T
K
T
)
Z
V
V
Z
Z-Voltage ( V )
50
40
Z
4
I
Z
=5mA
Fig.4 Temperature Coefficient of Vz vs. ZVoltage
0
5
10
15
0
50
100
150
200
)
F
p
(
e
c
n
a
t
i
c
a
p
a
C
e
d
o
i
D
C
D
V
Z
Z-Voltage ( V )
25
20
T
j
=25C
V
R
=2V
Fig.5 Diode Capacitance vs. ZVoltage
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BZM55C Series
0
0.2
0.4
0.6
0.8
0.001
0.01
0.1
1
10
100
1.0
)
A
m
(
t
n
e
r
r
u
C
d
r
a
w
r
o
F
I
F
V
F
Forward Voltage ( V )
T
j
=25C
Fig.6 Forward Current vs. Forward Voltage
0
4
8
12
16
20
0
20
40
60
80
100
)
A
m
(
t
n
e
r
r
u
C
-
Z
I
Z
V
Z
Z-Voltage ( V )
P
tot
=500mW
T
amb
=25C
Figure 8. ZCurrent vs. ZVoltage
15
20
25
30
0
10
20
30
40
50
)
A
m
(
t
n
e
r
r
u
C
-
Z
I
Z
V
Z
Z-Voltage ( V )
35
P
tot
=500mW
T
amb
=25C
Figure 7. ZCurrent vs. ZVoltage
0
5
10
15
20
1
10
100
1000
)
(
e
c
n
a
t
s
i
s
e
R
-
Z
l
a
i
t
n
e
r
e
f
f
i
D
r
Z
V
Z
Z-Voltage ( V )
25
T
j
=25C
I
Z
=1mA
5mA
10mA
Figure 9. Differential ZResistance vs. ZVoltage
1
10
100
1000
)
W
/
C
(
.
d
n
o
C
e
s
l
u
P
r
o
f
e
c
n
a
t
s
i
s
e
R
l
a
m
r
e
h
T
Z
p
h
t
t
p
Pulse Length ( ms )
0.1
1
10
100
t
p
/T=0.5
t
p
/T=0.2
t
p
/T=0.1
t
p
/T=0.05
t
p
/T=0.02
t
p
/T=0.01
Single Pulse
R
thJA
=300C/W
T=T
jmax
T
amb
i
ZM
=(V
Z
+(V
Z2
+4r
zj
T/Z
thp
)
1/2
)/(2r
zj
)
Figure 10. Thermal Response
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BZM55C Series
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