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®
WON-TOP ELECTRONICS
Features
Planar Die Construction
500mW Power Dissipation
2.4V – 68V Nominal Zener Voltage
5% Standard Vz Tolerance
Ideally Suited for Automated Assembly
For Use in Voltage Stabilizer or Reference
Mechanical Data
Case: MiniMELF, Molded Glass
Terminals: Plated Leads Solderable per
MIL-STD-202, Method 208
Polarity: Cathode Band
Weight: 0.03 grams
Marking: Cathode Band Only
Lead Free: For RoHS / Lead Free Version,
Add “-LF” Suffix to Part Number, See Page 5
ZMM5221B – ZMM5266B
500mW SURFACE MOUNT ZENER DIODE
Pb
A
B
C
MiniMELF
Dim Min Max
A 3.30 3.70
B 1.30 1.60
C 0.28 0.50
All Dimensions in mm
Maximum Ratings @TA=25°C unless otherwise specified
Characteristic
Peak Pulse Power Dissipation at TA = 25°C (Note 1)
Forward Voltage @ IF = 200mA
Thermal Resistance Junction to Ambient (Note 1)
Operating and Storage Temperature Range
Symbol
PD
VF
R JA
TJ, TSTG
Note: 1. Mounted on ceramic substrate with minimum recommended pad layout.
Value
500
1.1
0.3
-55 to +175
Unit
mW
V
°C/mW
°C
© Won-Top Electronics Co., Ltd.
Revision: September, 2012
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ZMM5221B – ZMM5266B
0.5
Mounted on FR-4 PCB with
0.4
Minimum Recommended
Pad Layout
0.3
0.2
0.1
0
0
25
20
15
10
5
35 70 105 140 175
TA, AMBIENT TEMPERATURE (°C)
Fig. 1 Power Derating Curve
210
10
12
15
18
TJ = 25°C
22
27
33
36
0
0
1000
5 10 15 20 25 30 35 40 45 50
VZ, ZENER VOLTAGE (V)
Fig. 3 Zener Breakdown Characteristics
100
TJ = 100°C
10
TJ = 25°C
1
0
0.2 0.4 0.6 0.8 1.0
VF, INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 5 Typical Forward Characteristics
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®
40
TJ = 25°C
2V4
2V7
3V0
30 3V3
3V6
3V9
4V3
20
4V7
5V1
10
WON-TOP ELECTRONICS
5V6 6V8 8V2
6V2 7V5 9V1
0
0 1 2 3 4 5 6 7 8 9 10
VZ, ZENER VOLTAGE (V)
Fig. 2 Zener Breakdown Characteristics
10
39 47 56 68
TJ = 25°C
43 51 62
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
VZ, ZENER VOLTAGE (V)
Fig. 4 Zener Breakdown Characteristics
1000
TJ = 25°C
f = 1MHz
@ 0V Bias
100 @ 1V Bias
10
1
10 100
VZ, NOMINAL ZENER VOLTAGE (V)
Fig. 6 Junction Capacitance vs. Nominal Zener Voltage
© Won-Top Electronics Co., Ltd.
Revision: September, 2012

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®
WON-TOP ELECTRONICS
ZMM5221B – ZMM5266B
Electrical Characteristics (@TA=25°C unless otherwise specified) Table 1
Type
Number
(Note 1)
Zener Voltage Range
(Note 2)
Nom (V)
VZ @ IZT
Min (V)
Max (V)
Maximum Zener Impedance
(Note 3)
ZZT @ IZT
( ) (mA)
ZZK @ IZK
( ) (mA)
ZMM5221B
ZMM5222B
ZMM5223B
ZMM5225B
ZMM5226B
ZMM5227B
ZMM5228B
ZMM5229B
ZMM5230B
ZMM5231B
ZMM5232B
ZMM5233B
ZMM5234B
ZMM5235B
ZMM5236B
ZMM5237B
ZMM5238B
ZMM5239B
ZMM5240B
ZMM5241B
ZMM5242B
ZMM5243B
ZMM5245B
ZMM5246B
ZMM5248B
ZMM5250B
ZMM5251B
ZMM5252B
ZMM5254B
ZMM5255B
ZMM5256B
ZMM5257B
ZMM5258B
ZMM5259B
ZMM5260B
ZMM5261B
ZMM5262B
ZMM5263B
ZMM5264B
ZMM5265B
ZMM5266B
2.4 2.28 2.52 30
20
1200
0.25
2.5 2.38 2.63 30
20
1250
0.25
2.7 2.57 2.84 30
20
1300
0.25
3.0 2.85 3.15 29
20
1600
0.25
3.3 3.14 3.47 28
20
1600
0.25
3.6 3.42 3.78 24
20
1700
0.25
3.9 3.71 4.10 23
20
1900
0.25
4.3 4.09 4.52 22
20
2000
0.25
4.7 4.47 4.94 19
20
1900
0.25
5.1 4.85 5.36 17
20
1600
0.25
5.6 5.32 5.88 11
20
1600
0.25
6.0
5.70 6.30 7.0
20
1600
0.25
6.2
5.89 6.51 7.0
20
1000
0.25
6.8 6.46 7.14 5.0 20 750 0.25
7.5 7.13 7.88 6.0 20 500 0.25
8.2 7.79 8.61 8.0 20 500 0.25
8.7 8.27 9.14 8.0 20 600 0.25
9.1 8.65 9.56 10
20 600 0.25
10
9.50 10.50
17
20 600 0.25
11
10.45
11.55
22
20 600 0.25
12
11.40
12.60
30
20 600 0.25
13
12.35
13.65
13
9.5 600 0.25
15
14.25
15.75
16
8.5 600 0.25
16
15.20
16.80
17
7.8 600 0.25
18
17.10
18.90
21
7.0 600 0.25
20
19.00
21.00
25
6.2 600 0.25
22
20.90
23.10
29
5.6 600 0.25
24
22.80
25.20
33
5.2 600 0.25
27
25.65
28.35
41
4.6 600 0.25
28
26.60
29.40
44
4.5 600 0.25
30
28.50
31.50
49
4.2 600 0.25
33
31.35
34.65
58
3.8 700 0.25
36
34.20
37.80
70
3.4 700 0.25
39
37.05
40.95
80
3.2 800 0.25
43
40.85
45.15
93
3.0 900 0.25
47
44.65
49.35
105
2.7
1000
0.25
51
48.45
53.55
125
2.5
1100
0.25
56
53.20
58.80
150
2.2
1300
0.25
60
57.00
63.00
170
2.1
1400
0.25
62
58.90
65.10
185
2.0
1400
0.25
68
64.60
71.40
230
1.8
1600
0.25
Max Reverse
Leakage Current
IR @ VR
Typical Temp.
Coefficient of
Zener Voltage
(µA) (V)
(%/°C)
100 1.0
100 1.0
75 1.0
50 1.0
25 1.0
15 1.0
10 1.0
5.0 1.0
5.0 2.0
5.0 2.0
5.0 3.0
5.0 3.5
5.0 4.0
3.0 5.0
3.0 6.0
3.0 6.5
3.0 6.5
3.0 7.0
3.0 8.0
2.0 8.4
1.0 9.1
0.5 9.9
0.1 11
0.1 12
0.1 14
0.1 15
0.1 17
0.1 18
0.1 21
0.1 21
0.1 23
0.1 25
0.1 27
0.1 30
0.1 33
0.1 36
0.1 39
0.1 43
0.1 46
0.1 47
0.1 52
-0.075
-0.075
-0.075
-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
+0.083
+0.085
+0.086
+0.087
+0.087
+0.090
+0.091
+0.091
+0.092
+0.093
+0.094
+0.095
+0.095
+0.096
+0.096
+0.097
+0.097
+0.097
Note: 1. Type numbers listed have standard tolerance on the nominal zener voltage of ±5%.
2. Measured with device junction in thermal equilibrium.
3. f = 1KHz
© Won-Top Electronics Co., Ltd.
Revision: September, 2012
www.wontop.com
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ZMM5221B – ZMM5266B
MARKING INFORMATION
Cathode Band Only
®
WON-TOP ELECTRONICS
RECOMMENDED FOOTPRINT
0.043 MIN
(1.10 MIN)
0.106 MIN
(2.70 MIN)
0.067 MIN
(1.70 MIN)
inches(mm)
PACKAGING INFORMATION
TAPE & REEL
Inspection Hole
178mm
Product ID Label
Direction of Unreeling
4mm
8mm
8mm
4mm
1.6mm
Reel Diameter
(mm)
178
Quantity
(PCS)
2,500
Inner Box Size
L x W x H (mm)
185 x 120 x 185
Quantity
(PCS)
25,000
Carton Size
L x W x H (mm)
400 x 273 x 415
Quantity
(PCS)
200,000
Approx. Gross Weight
(KG)
13.5
Note: 1. Anti-static plastic reel, white or water clear or blue color. Inspection hole might be varied in different alignment.
2. Components are packed in accordance with EIA standard 481-1 and 481-2.
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© Won-Top Electronics Co., Ltd.
Revision: September, 2012

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®
WON-TOP ELECTRONICS
ZMM5221B – ZMM5266B
ORDERING INFORMATION
Product No.
ZMM52xxB-T1
Package Type
MiniMELF
Shipping Quantity
2500/Tape & Reel
1. Shipping quantity given is for minimum packing quantity only. For minimum
order quantity, please consult the Sales Department.
2. To order RoHS / Lead Free version (with Lead Free finish), add “-LF”
suffix to part number above. For example, ZMM5221B-T1-LF.
WON-TOP ELECTRONICS and
are registered trademarks of Won-Top Electronics Co., Ltd (WTE). WTE has checked all information carefully and
believes it to be correct and accurate. However, WTE cannot assume any responsibility for inaccuracies. Furthermore, this information does not give the
purchaser of semiconductor devices any license under patent rights to manufacturer. WTE reserves the right to change any or all information herein
without further notice.
WARNING: DO NOT USE IN LIFE SUPPORT EQUIPMENT. WTE power semiconductor products are not authorized for use as critical components in life
support devices or systems without the express written approval.
Won-Top Electronics Co., Ltd.
No. 44 Yu Kang North 3rd Road,
Chine Chen Dist., Kaohsiung 806, Taiwan
Phone: 886-7-822-5408 or 886-7-822-5410
Fax: 886-7-822-5417
Email: sales@wontop.com
Internet: http://www.wontop.com
We power your everyday.
© Won-Top Electronics Co., Ltd.
Revision: September, 2012
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