Surface Mount Zener
Diodes
MINI-MELF
Outline
Dimensions
* 500mw Power Dissipation
* General Purpose, Medium Current
* Ideal for Surface Mountted Application
* Case : MINI-MELF Glass Case(SOD-80)
* Weight : Approx 0.05 gram
Mechanical Data:
Features:
WEITRON
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ZMM5221B thru ZMM5262B
SMALL SIGNAL
ZENER DIODES
0.5 WATTS
MINI-MELF
Un
i
t
:m
m
A
B
C
Dim
A
B
C
Min
3
.
3
0
1
.
3
0
0
.
2
8
Max
3
.
7
0
1
.
6
0
0
.
5
0
MINI
MELF
Lead(Pb)-Fr
ee
P
b
ZMM5221B thru ZMM5262B
WEITRON
Maximum Ratings and Electrical Characteristics
Characteristics
Symbol
Unit
P
ower Dissipation T
A
=75 C
T
hermal R
esistance J
unction to Ambient Air
(1)
F
orwar
d V
oltage @ IF=200mA
Operation and Storag
e T
emperatur
e R
ange
V
C/W
NO
TES:1.V
alid Pro
vided that Electrodes ar
e K
e
pt at Ambient T
emper
ature
.
C
R J
A
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(1)
PD
VF
Tj,TST
G
V
alue
500
300
1.1
-65 to+175
mW
(T
A=25 C Unless Otherwise Noted)
ZMM5221B
thru
ZMM5262B
W
E
I
T
R
O
N
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Part
Number
Zener
V
oltage(Note1)
T
ypical T
emperature
Coefficient
A
ZMM5221B
ZMM5222B
ZMM5223B
ZMM5224B
ZMM5225B
ZMM5226B
ZMM5227B
ZMM5228B
ZMM5229B
ZMM5230B
ZMM5231B
ZMM5232B
ZMM5233B
ZMM5234B
ZMM5235B
ZMM5236B
ZMM5237B
ZMM5238B
ZMM5239B
ZMM5240B
ZMM5241B
ZMM5242B
ZMM5243B
ZMM5244B
ZMM5245B
ZMM5246B
ZMM5247B
ZMM5248B
ZMM5249B
ZMM5250B
ZMM5251B
ZMM5252B
ZMM5253B
ZMM5254B
ZMM5255B
ZMM5256B
ZMM5257B
ZMM5258B
ZMM5259B
ZMM5260B
ZMM5261B
ZMM5262B
V
z
Nom
(V)
Max
(V)
Min
(V)
Max, Zener Impedance
Max ,Reverse
Leakage Current
Z
ZT
@I
ZT
T
c
I
R
@V
R
Electrical Characteristics
(T
A
=25 C unless otherwise noted, V
F
=1.1 V Max. @I
F
=200mA for all types)
( V
)
( )
mA
m
A
@I
ZT
2.4
2.5
2.7
2.8
3.0
3.3
3.6
3.9
4.3
4.7
5.1
5.6
6.0
6.2
6.8
7.5
8.2
8.7
9.1
10
11
12
13
14
15
16
17
18
19
20
22
24
25
27
28
30
33
36
39
43
47
51
2.28
2.38
2.57
2.66
2.85
3.14
3.42
3.71
4.09
4.47
4.85
5.32
5.70
5.89
6.46
7.13
7.79
8.27
8.65
9.50
10.45
11.40
12.35
13.30
14.24
15.20
16.15
17.10
18.05
19.00
20.90
22.80
23.75
25.65
26.60
28.50
31.35
34.20
37.05
40.85
44.65
48.45
2.52
2.63
2.84
2.94
3.15
3.47
3.78
4.10
4.52
4.94
5.36
5.88
6.30
6.51
7.14
7.88
8.61
9.14
9.56
10.50
11.55
12.60
13.65
14.70
15.75
16.80
17.85
18.90
19.95
21.00
23.010
25.20
26.25
28.35
29.40
31.50
34.65
37.80
40.95
45.15
49.35
53.55
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
9.5
9.0
8.5
7.8
7.4
7.0
6.6
6.2
5.6
5.2
5.0
4.6
4.5
4.2
3.8
3.4
3.2
3.0
2.7
2.5
100
100
75
75
50
25
15
10
5.0
5.0
5.0
5.0
5.0
5.0
3.0
3.0
3.0
3.0
3.0
3.0
2.0
1.0
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
2.0
2.0
3.0
3.5
4.0
5.0
6.0
6.5
6.5
7.0
8.0
8.4
9.1
9.9
10
11
12
13
14
14
15
17
18
19
21
21
23
25
27
30
33
36
39
30
30
30
30
29
28
24
23
22
19
17
11
7.0
7.0
5.0
6.0
8.0
8.0
10
17
22
30
13
15
16
17
19
21
23
25
29
33
35
41
44
49
58
70
80
93
105
125
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
9.5
9.0
8.5
7.8
7.4
7.0
6.6
6.2
5.6
5.2
5.0
4.6
4.5
4.2
3.8
3.4
3.2
3.0
2.7
2.5
-0.085
-0.085
-0.085
-0.085
-0.075
-0.070
-0.065
-0.060
-0.055
±0.030
±0.030
+0.038
+0.038
+0.045
+0.050
+0.058
+0.062
+0.065
+0.068
+0.075
+0.076
+0.077
+0.079
+0.082
+0.082
+0.083
+0.084
+0.085
+0.086
+0.086
+0.087
+0.087
+0.089
+0.090
+0.091
+0.091
+0.092
+0.093
+0.094
+0.095
+0.095
+0.096
% / C
2. Zenner V
olta
ge T
olerance Suffix "B" F
or 5%
1. Zener voltag
e is measured with a pulse test curr
ent I
z
at an ambient temper
ture of
25 C
W
( )
( )
( )
ZMM5221B
thru
ZMM5262B
W
E
I
T
R
O
N
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500
400
300
200
100
0
0
40
80
120
160
200
T
A
,
AMBIENT
TEMPERA
TURE
FIG 1, Power Dissipation vs
Ambient
T
emperature
P
D
,POWER DISSIP
A
TION(mW)
V
Z
, ZENER V
OL
T
AGE (V)
Fig 2., Junction Capacitance vs Zener
V
oltage
C
j
, JUNCTION CAP
ACIT
ANCE(pF)
V
R
=2.0V
T
J
=25 C
0
5
10
15
20
25
200
150
100
50
0
V
Z
, ZENER V
OL
T
AGE (V)
FIG 3, DIFFERENTIAL
ZENER IMPEDANCE
DIFFERENTIAL
ZENER RESIST
ANCE ( )
1000
100
10
1
0
5
10
15
20
25
I
z
=1.0 mA
5.0 mA
10 mA
T
j
=25 C
R
JA
R
JA
(1)=r(1)
R
JA
= 300K/W
P(pk)
t
1
t
2
R
JA
T
J
-T
A
=Ppk
Duty Cycle, D=t1/t2
D=0.5
0.2
0.1
0.05
0.02
0.01
t1, SQUARE W
A
VE PULSE DURA
TION (seconds)
Fig 4 ,T
ypical Normallzed
T
ransient Thermal Impedance Curves
1000
100
10
1.0
0.1
1.0
10
100
1000
r(t), NORMALIZED EFFECTIVE
TRANSIENT THE RMAL
RESISRT
ANCE ( C)
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