• Total power dissipation: Max. 500mW.
• Wide zener reverse voltage range 2.4V to 39V.
• Small plastic package suitable for surface mounted design.
• Tolerance approximately±5%
Parameter
Power Dissipation
Operating and Storage Temperature Range
Symbol
Value
Unit
P
tot
500
mW
°C
-55 ~ +150
T , T
j
stg
Typical thermal resistance juncting to ambient
R
θJA
°C/W
340
(1)
Fig.1 Maximum Continuous Power Derating
0.1
0.2
0.3
0.4
0.5
0.6
0.0
25 50
75
100 125 150 175
Power Dissipation (W)
T °C)
c
,Case Temperature (
(1) .0" X 2.0" (5 X 5 cm)Thermal resistance from junction to ambient at P.C.B. mounted with 2 copper areas pads.
0.01
100
10
100
1000
Fig.2 Typical Transient Thermal Impedance
Transient Thermal Impedance /W°C
t, Pulse Durationsec
0.1 1 10
2000
Simplified outline(SOD-123)
1.Cathode
2.Anode
1
2
Silicon Planar Zener Diodes
Ta
=
25
Absolute Maximum Ratings And Characteristics
Features
MMSZ5221B-MMSZ5259B
1
www.slkormicro.com
1
VZT is tested with pulses (20 ms)
Type
Zener Voltage Range
1
V
ZT
at I
ZT
I
ZT
Dynamic Impedance
Reverse Current
Z
ZT
at I
ZT
I
R
at V
R
Max (Ω)
MaxnA
VNomVMinV MaxV
(mA)
MMSZ5221B
MMSZ5222B
MMSZ5223B
MMSZ5225B
MMSZ5226B
MMSZ5227B
MMSZ5228B
MMSZ5229B
MMSZ5230B
MMSZ5231B
MMSZ5232B
MMSZ5234B
MMSZ5235B
MMSZ5236B
MMSZ5237B
MMSZ5239B
MMSZ5240B
MMSZ5241B
MMSZ5242B
MMSZ5243B
MMSZ5245B
MMSZ5246B
MMSZ5248B
MMSZ5250B
MMSZ5251B
MMSZ5252B
MMSZ5254B
MMSZ5255B
MMSZ5256B
MMSZ5257B
MMSZ5258B
MMSZ5259B
2.28
2.38
2.57
2.85
3.14
3.42
3.71
4.09
4.47
4.85
5.32
5.89
6.46
7.13
7.79
8.65
9.5
10.45
11.4
12.35
14.25
15.2
17.1
19
20.9
22.8
25.65
26.6
28.5
31.35
34.2
37.05
2.52
2.63
2.84
3.15
3.47
3.78
4.1
4.52
4.94
5.36
5.88
6.51
7.14
7.88
8.61
9.56
10.5
11.55
12.6
13.65
15.75
16.8
18.9
21
23.1
25.2
28.35
29.4
31.5
34.65
37.8
40.95
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
9.5
8.5
7.8
7
6.2
5.6
5.2
5
4.5
4.2
3.8
3.4
3.2
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
0.25
0.25
0.25
0.25
0.25
0.25
0.25
100
100
75
50
25
15
10
5
5
5
5
5
3
3
3
3
3
3
2
1
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
1
1
1
1
1
1
1
1
2
2
3
4
5
6
6
6.5
8
8.4
9.1
9.9
11
12
14
15
17
18
21
21
23
25
27
30
2.4
2.5
2.7
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
28
30
33
36
39
Z
ZK
at I
ZK
I
ZK
(mA)
Max (Ω)
30
30
30
30
28
24
23
22
19
17
11
7
5
6
8
10
17
22
30
13
16
17
21
25
29
33
41
44
49
58
70
80
1200
1250
1300
1600
1600
1700
1900
2000
1900
1600
1600
1000
750
500
500
600
600
600
600
600
600
600
600
600
600
600
600
600
600
700
700
800
C1
C2
C3
C5
D1
D2
D3
D4
D5
E1
E2
E4
E5
F1
F2
F4
F5
H1
H2
H3
H5
J1
J3
J5
K1
K2
K4
K5
M1
M2
M3
M4
Mark
MMSZ5221B-MMSZ5259B
2
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