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
Unit:mm
A
B
C
Dim
A
B
C
Min
3.30
1.30
0.28
Max
3.70
1.60
0.50
MINI MELF
Lead(Pb)-Free
P b
ZMM5221B thru ZMM5262B
WEITRON
Maximum Ratings and Electrical Characteristics
Characteristics
Symbol
Unit
Power Dissipation T
A
=75 C
Thermal Resistance Junction to Ambient Air
(1)
Forward Voltage @ IF=200mA
Operation and Storage Temperature Range
V
C/W
NOTES:1.Valid Provided that Electrodes are Kept at Ambient Temperature.
C
R JA
WEITRON
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(1)
PD
VF
Tj,TSTG
Value
500
300
1.1
-65 to+175
mW
(TA=25 C Unless Otherwise Noted)
ZMM5221B
thru
ZMM5262B
WE IT R ON
WEITRON
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Part
Number
Zener Voltage(Note1)
Typical Temperature
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
Tc
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
mA
@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 Voltage Tolerance Suffix "B" For 5%
1. Zener voltage is measured with a pulse test current Iz at an ambient temperture of 25 C
W
( )
( )
( )
ZMM5221B
thru
ZMM5262B
WE IT R ON
WEITRON
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500
400
300
200
100
0
0
40
80
120
160
200
T
A
, AMBIENT TEMPERATURE
FIG 1, Power Dissipation vs Ambient Temperature
P
D
,
P
O
W
E
R
D
I
S
S
I
P
A
T
I
O
N
(
m
W
)
V
Z
, ZENER VOLTAGE (V)
Fig 2., Junction Capacitance vs Zener Voltage
C
j ,
J
U
N
C
T
I
O
N
C
A
P
A
C
I
T
A
N
C
E
(
p
F
)
VR=2.0V
TJ=25 C
0
5
10
15
20
25
200
150
100
50
0
V
Z
, ZENER VOLTAGE (V)
FIG 3, DIFFERENTIAL ZENER IMPEDANCE
D
I
F
F
E
R
E
N
T
I
A
L
Z
E
N
E
R
R
E
S
I
S
T
A
N
C
E
(
)
1000
100
10
1
0
5
10
15
20
25
Iz=1.0 mA
5.0 mA
10 mA
Tj=25 C
R
JA
R
JA
(1)=r(1)
R
JA
= 300K/W
P(pk)
t1
t2
R
JA
TJ-TA=Ppk
Duty Cycle, D=t1/t2
D=0.5
0.2
0.1
0.05
0.02
0.01
t1, SQUARE WAVE PULSE DURATION (seconds)
Fig 4 ,Typical Normallzed Transient Thermal Impedance Curves
1000
100
10
1.0
0.1
1.0
10
100
1000
r
(
t
)
,
N
O
R
M
A
L
I
Z
E
D
E
F
F
E
C
T
I
V
E
T
R
A
N
S
I
E
N
T
T
H
E
R
M
A
L
R
E
S
I
S
R
T
A
N
C
E
(
C
)
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