Surface Mount Zener Diodes
*225mw Power Dissipation
*Ideal for Surface Mountted Application
*Case : SOT-23 Molded plastic
Mechanical Data:
Features:
WEITRON
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MMBZ5221B Series
SMALL SIGNAL
ZENER DIODES
225m WATTS
*Zener Breakdown Voltage Range 2.4V to 91V
*Terminals: Solderable per MIL-STD-202, Method 208
*Polarity: Cathode Indicated by Polarity Band
*Marking: Marking Code (See Table on Page 3)
*Weigh: 0.008grams(approx)
1
2
3
SOT-23
Unit:mm
Dim
A
B
C
D
E
G
H
J
K
L
M
Min
0.35
1.19
2.10
0.85
0.46
1.70
2.70
0.01
0.89
0.30
0.076
Max
0.51
1.40
3.00
1.05
1.00
2.10
3.10
0.13
1.10
0.61
0.25
SOT-23 Outline Dimensions
MMBZ5221B Series
WEITRON
Maximum Ratings and Electrical Characteristics
Characteristics
Symbol
Unit
Total Power Dissipation on FR-5 Board
@T =25 C
Thermal Resistance Junction to Ambient Air
Forward Voltage @ IF=10mA
Junction and Storage Temperature Range
V
C/W
NOTES:1.FR-5=1.0*0.75*0.62in
C
R JA
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(1)
(1)
PD
VF
Tj,TSTG
Value
225
556
0.9
-65 to+150
mW
(TA=25 C Unless Otherwise Noted)
A
Zener Voltage Regulator
I
F
V
I
I
R
I
ZT
V
R
V
Z
V
F
ELECTRICAL CHARACTERISTICS
(P inout: 1-Anode, 2-No C onnection, 3-C athode)
(T
A
= 25 C
unless otherwise noted, V
F
= 0.9V Max. @ I
F
= 10 mA)
Symbol
Parameter
V
Z
R everse Zener Voltage @ I
ZT
I
ZT
R everse C urrent
Z
ZT
Maximum Zener Impedance @ I
ZT
I
R
R everse Leakage C urrent @ V
R
V
R
R everse Voltage
I
F
F orward C urrent
V
F
F orward Voltage @ I
F
Z
Device Marking
Item
MMBZ5221B
Series
Marking
XX=Specific Device Code
(See Table on page3)
Equivalent Circuit Diagram
3
Cathode
Anode
1
I
ZK
ZK
R everse C urrent
Maximum Zener Impedance@ I
ZK
E L E C T R IC A L C HA R A C T E R IS T IC S
(P inout: 1-Anode, 2-NC , 3-C athode)
(V
F
= 0.9 V Max @ I
F
= 10 mA for all types.)
Zener Voltage (Note)
Zener Impedance
L eakage C urrent
Device
V
Z
(Volts )
@ I
ZT
Z
ZT
@ I
ZT
Z
ZK
@ I
ZK
I
R
@ V
R
Device
Device
Marking
Min
Nom
Max
mA
mA
uA
Volts
MMB Z5221B
18A
2.28
2.4
2.52
20
30
1200
0.25
100
1
MMB Z5222B
18B
2.37
2.5
2.63
20
30
1250
0.25
100
1
MMB Z5223B
18C
2.56
2.7
2.84
20
30
1300
0.25
75
1
MMB Z5224B
18D
2.66
2.8
2.94
20
30
1400
0.25
75
1
MMB Z5225B
18E
2.85
3
3.15
20
29
1600
0.25
50
1
MMB Z5226B
8A
3.13
3.3
3.47
20
28
1600
0.25
25
1
MMB Z5227B
8B
3.42
3.6
3.78
20
24
1700
0.25
15
1
MMB Z5228B
8C
3.70
3.9
4.10
20
23
1900
0.25
10
1
MMB Z5229B
8D
4.08
4.3
4.52
20
22
2000
0.25
5
1
MMB Z5230B
8E
4.46
4.7
4.94
20
19
1900
0.25
5
2
MMB Z5231B
8F
4.84
5.1
5.36
20
17
1600
0.25
5
2
MMB Z5232B
8G
5.32
5.6
5.88
20
11
1600
0.25
5
3
MMB Z5233B
8H
5.70
6
6.30
20
7
1600
0.25
5
3.5
MMB Z5234B
8J
5.89
6.2
6.51
20
7
1000
0.25
5
4
MMB Z5235B
8K
6.46
6.8
7.14
20
5
750
0.25
3
5
MMB Z5236B
8L
7.12
7.5
7.88
20
6
500
0.25
3
6
MMB Z5237B
8M
7.79
8.2
8.61
20
8
500
0.25
3
6.5
MMB Z5238B
8N
8.26
8.7
9.14
20
8
600
0.25
3
6.5
MMB Z5239B
8P
8.64
9.1
9.56
20
10
600
0.25
3
7
MMB Z5240B
8Q
9.50
10
10.50
20
17
600
0.25
3
8
MMB Z5241B
8R
10.4
11
11.55
20
22
600
0.25
2
8.4
MMB Z5242B
8S
11.40
12
12.60
20
30
600
0.25
1
9.1
MMB Z5243B
8T
12.35
13
13.65
9.5
13
600
0.25
0.5
9.9
MMB Z5244B
8U
13.30
14
14.70
9
15
600
0.25
0.1
10
MMB Z5245B
8V
14.25
15
15.75
8.5
16
600
0.25
0.1
11
MMB Z5246B
8W
15.20
16
16.80
7.8
17
600
0.25
0.1
12
MMB Z5247B
8X
16.15
17
17.85
7.4
19
600
0.25
0.1
13
MMB Z5248B
8Y
17.10
18
18.90
7
21
600
0.25
0.1
14
MMB Z5249B
8Z
18.05
19
19.95
6.6
23
600
0.25
0.1
14
MMB Z5250B
81A
19.00
20
21.00
6.2
25
600
0.25
0.1
15
MMB Z5251B
81B
20.90
22
23.10
5.6
29
600
0.25
0.1
17
MMB Z5252B
81C
22.80
24
25.20
5.2
33
600
0.25
0.1
18
MMB Z5253B
81D
23.75
25
26.25
5
35
600
0.25
0.1
19
MMB Z5254B
81E
25.65
27
28.35
4.6
41
600
0.25
0.1
21
MMB Z5255B
81F
26.60
28
29.40
4.5
44
600
0.25
0.1
21
MMB Z5256B
81G
28.50
30
31.50
4.2
49
600
0.25
0.1
23
MMB Z5257B
81H
31.35
33
34.65
3.8
58
700
0.25
0.1
25
MMB Z5258B
81J
34.20
36
37.80
3.4
70
700
0.25
0.1
27
MMB Z5259B
81K
37.05
39
40.95
3.2
80
800
0.25
0.1
30
MMB Z5260B
81L
40.85
43
45.15
3
93
900
0.25
0.1
33
MMB Z5261B
81M
44.65
47
49.35
2.7
105
1000
0.25
0.1
36
MMB Z5262B
81N
48.45
51
53.55
2.5
125
1100
0.25
0.1
39
MMB Z5263B
81P
53.20
56
58.80
2.2
150
1300
0.25
0.1
43
MMB Z5264B
81Q
57.00
60
63.00
2.1
170
1400
0.25
0.1
46
MMB Z5265B
81R
58.90
62
65.10
2
185
1400
0.25
0.1
47
MMB Z5266B
81S
64.60
68
71.40
1.8
230
1600
0.25
0.1
52
MMB Z5267B
81T
71.25
75
78.75
1.7
270
1700
0.25
0.1
56
MMB Z5268B
81U
77.90
82
86.10
1.5
330
2000
0.25
0.1
62
MMB Z5269B
81V
82.65
87
91.35
1.4
370
2200
0.25
0.1
68
MMB Z5270B
81W
86.45
91
95.55
1.4
400
2300
0.25
0.1
69
NOT E . Zener voltage is measured with a pulse test current I
Z
at an ambient temperature of 25 C
MMBZ5221B Series
WE IT R ON
WEITRON
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T Y P IC A L C HA R A C T E R IS T IC S
C
,
C
A
P
A
C
I
T
A
N
C
E
(
p
F
)
100
V
Z
, NOMINAL ZE NE R VOLTAG E (V)
F igure 5. Typical C apacitance
1000
100
10
1
10
1
B IA S A
T
50% OF V
Z
NOM
T
A
= 25C
0 V BIAS
1 V BIAS
12
V
Z
, ZE NE R VOLTA G E (V)
100
10
1
0.1
0.01
10
8
6
4
2
0
T
A
= 25C
I Z
,
Z
E
N
E
R
C
U
R
R
E
N
T
(
m
A
)
V
Z
, ZE NE R VOLTA G E (V)
100
10
1
0.1
0.01
10
30
50
70
90
T
A
= 25C
I R
,
L
E
A
K
A
G
E
C
U
R
R
E
N
T
(
A
)
90
V
Z
, NOMINAL ZE NE R VOL
TAG E (V)
F igure 6. Typical L eakage C urrent
1000
100
10
1
0.1
0.01
0.001
0.0001
0.00001
80
70
60
50
40
30
20
10
0
+150 C
+25 C
55 C
I Z
,
Z
E
N
E
R
C
U
R
R
E
N
T
(
m
A
)
F igure 7. Zener Voltage vers us Zener C urrent
(V
Z
Up to 12 V )
F igure 8. Zener Voltage vers us Zener C urrent
(12 V to 91 V )
MMBZ5221B Series
WE IT R ON
WEITRON
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T Y P IC A L C HA R A C T E R IS T IC S
V
Z,
T
E
M
P
E
R
A
T
U
R
E
C
O
E
F
F
I
C
I
E
N
T
(
m
V
/
C
)
V
Z
, NOMINAL ZE NE R VOL
TAG E (V)
3
2
1
0
1
2
3
4
5
6
7
8
12
11
10
9
8
7
6
5
4
3
2
F igure 1. Temperature C oefficients
(Temperature R ange 5
5 C to +150 C )
T Y P IC A L T
C
VA L UE S
F OR MMB Z5221B LT 1 S E R IE S
V
Z
@ I
ZT
V
Z,
T
E
M
P
E
R
A
T
U
R
E
C
O
E
F
F
I
C
I
E
N
T
(
m
V
/
C
)
100
10
1
10
100
V
Z
, NOMINAL ZE NE R VOLTAG E (V)
F igure 2. Temperature C oeffic ients
(Temperature R ange 5
5 C to +150 C )
T Y P IC A L T
C
VA L UE S
F OR MMB Z5221B LT 1 S E R IE S
V
Z
@ I
ZT
100
V
Z
, NOMINA L ZE NE R VOLTA G E
F igure 3. E ffect of Zener V
oltage on
Zener Impedance
10
1
Z
Z
T,
D
Y
N
A
M
I
C
I
M
P
E
D
A
N
C
E
(
)
1000
100
10
1
T
J
= 25 C
I
Z(AC )
= 0.1 I
Z( DC )
f = 1 kHz
I
Z
= 1 mA
5 mA
20 mA
V
F
, F ORWAR D VOLTAG E (V)
F igure 4. Typical F orward Voltage
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
I F
,
F
O
R
W
A
R
D
C
U
R
R
E
N
T
(
m
A
)
1000
100
10
1
75 V (MMB Z5267B L
T 1)
91 V (MMB Z5270B L
T 1)
150 C
75 C 25 C
0 C
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MMBZ5221B Series
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