MMBZ5221BS - 5259BS Datasheet by Diodes Incorporated
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Lead (ree Green
 
 
 
 
 
 
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Characlerislic Symbol Value Unil
Forward Vollage @ lp= IDmA v; 09 v
Characlerislic Symbol Value Unil
Power DlSSlpatlcm (Note 1) PD 200 mW
Thermal Resmance‘ Juncllorl m Amblem Alr lNele H RM 625 “C/W
Operallng and smrage Temperature Range TJ T579 765 m +150 °c
®
Lead (ree Green
 
 
 
 
 
 
:I
 
 
 
 
[:1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Characlerislic Symbol Value Unil
Forward Vollage @ lp= IDmA v; 09 v
Characlerislic Symbol Value Unil
Power DlSSlpatlcm (Note 1) PD 200 mW
Thermal Resmance‘ Juncllorl m Amblem Alr lNele H RM 625 “C/W
Operallng and smrage Temperature Range TJ T579 765 m +150 °c
 
 
 
MMBZ5221BS - MMBZ5259BS  
200mW SURFACE MOUNT ZENER DIODE  
Features 
•  Planar Die Construction 
•  Dual Isolated Zeners in Ultra-Small Surface Mount Package 
•  Ideally Suited for Automated Assembly Processes  
•  Lead Free/RoHS Compliant  (Note 2) 
•  "Green" Device (Note 3 and 4) 
 Mechanical Data 
•  Case: SOT-363 
•  Case Material:  Molded Plastic.  UL Flammability Classification 
Rating 94V-0 
•  Moisture Sensitivity:  Level 1 per J-STD-020D 
•  Terminals: Solderable per MIL-STD-202, Method 208 
•  Lead Free Plating (Matte Tin Finish annealed over Alloy 42 
leadframe).  
•  Polarity: See Diagram 
•  Marking Information: See Page 4 
•  Ordering Information: See Page 4 
•  Weight: 0.006 grams (approximate) 
C
1
A
1
C
2
A
2
NC
NC
 Top View Device Schematic
Maximum Ratings  @TA = 25°C unless otherwise specified   
Characteristic  Symbol  Value  Unit 
Forward Voltage     @ IF = 10mA  VF 0.9  V 
Thermal Characteristics    
Characteristic  Symbol  Value  Unit 
Power Dissipation                                                                (Note 1) PD 200  mW 
Thermal Resistance, Junction to Ambient Air                      (Note 1) RθJA 625  °C/W 
Operating and Storage Temperature Range  TJ, TSTG -65 to +150  °C 
Notes:  1.    Mounted on FR4 PC Board with recommended pad layout which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 
2.    No purposefully added lead. 
  3.    Diodes Inc.'s "Green" policy can be found on our website at http://www.diodes.com/products/lead_free/index.php. 
  4.    Product manufactured with Date Code UO (week 40, 2007) and newer are built with Green Molding Compound. Product manufactured prior to Date  
                       Code UO are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants. 
MMBZ5221BS - MMBZ5259BS 
Document number: DS31039  Rev. 15 - 2 
1 of 4 
www.diodes.com   June 2008
© Diodes Incorporated 
Please click here to visit our online spice models database.
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Type Marking 21K @ sz
Number Code In : 0.25” IR
Max (V) mA ”A v
MMBZ5221BS K01 2.4 2.28 2 52 20 30 1200 100 1.0
MMBZ5223BS K03 2.7 2.57 2 54 20 30 1300 75 1.0
MMBZ5225BS K05 3.0 2.85 315 20 30 1600 50 1.0
MMBZ5226BS KG1 3.3 3.14 3 47 20 28 1600 25 1.0
MMBZ5227BS KG2 3.6 3.42 3 75 20 24 1700 15 1.0
MMBZ5225BS KG3 3.9 3.71 410 20 23 1900 10 1.0
MMBZ5229BS KG4 4.3 4.09 4 52 20 22 2000 5,0 1.0
MMBZ523OBS KG5 4.7 4.47 494 20 19 1900 5,0 2.0
MMBZ5231BS KE1 5.1 4.85 5 36 20 17 1600 5,0 2.0
MMBZ5232BS KE2 5.6 5.32 5 55 20 11 1600 5,0 3.0
MMBZ5233BS KE3 6.0 5.70 6 30 20 7 1600 5,0 3.5
MMBZ5234BS KE4 6.2 5.89 6 51 20 7 1000 5,0 4.0
MMBZ5235BS KE5 6.5 6.46 714 20 5 750 3,0 5.0
MMBZ5236BS KF1 7.5 7.13 7 55 20 6 500 3,0 6.0
MMBZ5237BS KF2 8.2 7.79 8 61 20 5 500 3,0 6.5
MMBZ5235BS KF3 8.7 8.27 914 20 5 600 3,0 6.5
MMBZ5239BS KF4 9.1 8.65 9 56 20 10 600 3,0 7.0
MMBZ524OBS KF5 10 9.50 10.50 20 17 600 3,0 5.0
MMBZ5241BS KH1 11 1045 11.55 20 22 600 2,0 5.4
MMBZ5242BS KH2 12 11 40 12.60 20 30 600 1,0 9.1
MMBZ5243BS KH3 13 1235 13.65 9.5 13 600 0,5 9.9
MMBZ5245BS KH5 15 1425 15.75 8.5 16 600 0,1 11
MMBZ5246BS KJ1 16 1520 16.80 7.5 17 600 0,1 12
MMBZ5245BS KJ3 18 1710 15.90 7.0 21 600 0,1 14
MMBZ525OBS KJ5 20 1900 21.00 6.2 25 600 0,1 15
MMBZ5251BS KK1 22 20 90 23.10 5.6 29 600 0,1 17
MMBZ5252BS KK2 24 22 50 25.20 5.2 33 600 0,1 18
MMBZ5254BS KK4 27 25 65 25.35 5.0 41 600 0,1 21
MMBZ5255BS KK5 28 26 60 29.40 4.5 44 600 0,1 21
MMBZ5256BS KM1 30 25 50 31.50 4.2 49 600 0,1 23
MMBZ5257BS KM2 33 31 35 34.65 3.5 58 700 0,1 25
MMBZ5255BS KM3 36 34 20 37.80 3.4 70 700 0,1 27
MMBZ5259BS KM4 39 37 05 40.95 3.2 80 500 0,1 30
 
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Type Marking 21K @ sz
Number Code In : 0.25” IR
Max (V) mA ”A v
MMBZ5221BS K01 2.4 2.28 2 52 20 30 1200 100 1.0
MMBZ5223BS K03 2.7 2.57 2 54 20 30 1300 75 1.0
MMBZ5225BS K05 3.0 2.85 315 20 30 1600 50 1.0
MMBZ5226BS KG1 3.3 3.14 3 47 20 28 1600 25 1.0
MMBZ5227BS KG2 3.6 3.42 3 75 20 24 1700 15 1.0
MMBZ5225BS KG3 3.9 3.71 410 20 23 1900 10 1.0
MMBZ5229BS KG4 4.3 4.09 4 52 20 22 2000 5,0 1.0
MMBZ523OBS KG5 4.7 4.47 494 20 19 1900 5,0 2.0
MMBZ5231BS KE1 5.1 4.85 5 36 20 17 1600 5,0 2.0
MMBZ5232BS KE2 5.6 5.32 5 55 20 11 1600 5,0 3.0
MMBZ5233BS KE3 6.0 5.70 6 30 20 7 1600 5,0 3.5
MMBZ5234BS KE4 6.2 5.89 6 51 20 7 1000 5,0 4.0
MMBZ5235BS KE5 6.5 6.46 714 20 5 750 3,0 5.0
MMBZ5236BS KF1 7.5 7.13 7 55 20 6 500 3,0 6.0
MMBZ5237BS KF2 8.2 7.79 8 61 20 5 500 3,0 6.5
MMBZ5235BS KF3 8.7 8.27 914 20 5 600 3,0 6.5
MMBZ5239BS KF4 9.1 8.65 9 56 20 10 600 3,0 7.0
MMBZ524OBS KF5 10 9.50 10.50 20 17 600 3,0 5.0
MMBZ5241BS KH1 11 1045 11.55 20 22 600 2,0 5.4
MMBZ5242BS KH2 12 11 40 12.60 20 30 600 1,0 9.1
MMBZ5243BS KH3 13 1235 13.65 9.5 13 600 0,5 9.9
MMBZ5245BS KH5 15 1425 15.75 8.5 16 600 0,1 11
MMBZ5246BS KJ1 16 1520 16.80 7.5 17 600 0,1 12
MMBZ5245BS KJ3 18 1710 15.90 7.0 21 600 0,1 14
MMBZ525OBS KJ5 20 1900 21.00 6.2 25 600 0,1 15
MMBZ5251BS KK1 22 20 90 23.10 5.6 29 600 0,1 17
MMBZ5252BS KK2 24 22 50 25.20 5.2 33 600 0,1 18
MMBZ5254BS KK4 27 25 65 25.35 5.0 41 600 0,1 21
MMBZ5255BS KK5 28 26 60 29.40 4.5 44 600 0,1 21
MMBZ5256BS KM1 30 25 50 31.50 4.2 49 600 0,1 23
MMBZ5257BS KM2 33 31 35 34.65 3.5 58 700 0,1 25
MMBZ5255BS KM3 36 34 20 37.80 3.4 70 700 0,1 27
MMBZ5259BS KM4 39 37 05 40.95 3.2 80 500 0,1 30
 
 
 
 
 
 
 
MMBZ5221BS - MMBZ5259BS 
Document number: DS31039  Rev. 15 - 2 
2 of 4 
www.diodes.com   June 2008
© Diodes Incorporated 
MMBZ5221BS - MMBZ5259BS
Electrical Characteristics  @TA = 25°C unless otherwise specified 
Zener Voltage Range (Note 5)  Maximum Zener 
Impedance (Note 6)  Maximum Reverse 
Leakage Current (Note 5)
VZ @ IZT  IZT  ZZT  @  IZT ZZK @ IZK 
= 0.25mA IR @ VR 
Type 
Number  Marking 
Code 
Nom (V)  Min (V)  Max (V)  mA  Ω μA  V 
MMBZ5221BS  KC1  2.4  2.28  2.52  20  30  1200  100  1.0 
MMBZ5223BS  KC3  2.7  2.57  2.84  20  30  1300  75  1.0 
MMBZ5225BS  KC5  3.0  2.85  3.15  20  30  1600  50  1.0 
MMBZ5226BS  KG1  3.3  3.14  3.47  20  28  1600  25  1.0 
MMBZ5227BS  KG2  3.6  3.42  3.78  20  24  1700  15  1.0 
MMBZ5228BS  KG3  3.9  3.71  4.10  20  23  1900  10  1.0 
MMBZ5229BS  KG4  4.3  4.09  4.52  20  22  2000  5.0  1.0 
MMBZ5230BS  KG5  4.7  4.47  4.94  20  19  1900  5.0  2.0 
MMBZ5231BS  KE1  5.1  4.85  5.36  20  17  1600  5.0  2.0 
MMBZ5232BS  KE2  5.6  5.32  5.88  20  11  1600  5.0  3.0 
MMBZ5233BS  KE3  6.0  5.70  6.30  20  7  1600  5.0  3.5 
MMBZ5234BS  KE4  6.2  5.89  6.51  20  7  1000  5.0  4.0 
MMBZ5235BS  KE5  6.8  6.46  7.14  20  5  750  3.0  5.0 
MMBZ5236BS  KF1  7.5  7.13  7.88  20  6  500  3.0  6.0 
MMBZ5237BS  KF2  8.2  7.79  8.61  20  8  500  3.0  6.5 
MMBZ5238BS  KF3  8.7  8.27  9.14  20  8  600  3.0  6.5 
MMBZ5239BS  KF4  9.1  8.65  9.56  20  10  600  3.0  7.0 
MMBZ5240BS  KF5  10  9.50  10.50  20  17  600  3.0  8.0 
MMBZ5241BS  KH1  11  10.45  11.55  20  22  600  2.0  8.4 
MMBZ5242BS  KH2  12  11.40  12.60  20  30  600  1.0  9.1 
MMBZ5243BS  KH3  13  12.35  13.65  9.5  13  600  0.5  9.9 
MMBZ5245BS  KH5  15  14.25  15.75  8.5  16  600  0.1  11 
MMBZ5246BS  KJ1  16  15.20  16.80  7.8  17  600  0.1  12 
MMBZ5248BS  KJ3  18  17.10  18.90  7.0  21  600  0.1  14 
MMBZ5250BS  KJ5  20  19.00  21.00  6.2  25  600  0.1  15 
MMBZ5251BS  KK1  22  20.90  23.10  5.6  29  600  0.1  17 
MMBZ5252BS  KK2  24  22.80  25.20  5.2  33  600  0.1  18 
MMBZ5254BS  KK4  27  25.65  28.35  5.0  41  600  0.1  21 
MMBZ5255BS  KK5  28  26.60  29.40  4.5  44  600  0.1  21 
MMBZ5256BS  KM1  30  28.50  31.50  4.2  49  600  0.1  23 
MMBZ5257BS  KM2  33  31.35  34.65  3.8  58  700  0.1  25 
MMBZ5258BS  KM3  36  34.20  37.80  3.4  70  700  0.1  27 
MMBZ5259BS  KM4  39  37.05  40.95  3.2  80  800  0.1  30 
Notes:  5.   Short duration pulse test used to minimize self-heating effect. 
6.   f = 1KHz. 
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 MMBZ5221BS - MMBZ5259BS
0
0.1
0.2
0.3
0.4
0150
P
, 
P
O
WE
R
 DISSI
P
A
T
I
O
N (W)
D
T , AMBIENT TEMPERATURE ( C)
Fig. 1  Power Derating Curve
A
°
0
10
20
30
40
50
01234567891
I, ZENE
0
R
C
U
R
R
EN
T
 (mA)
Z
V , ZENER VOLTAGE (V)
Fig. 2  Typical Zener Breakdown Characteristics
Z
T = 25°C
j
C5V6
6V8
8V2
Test Current I
20mA
Z
0
10
20
30
0
I, ZENE
R
C
U
R
R
EN
T
 (mA)
Z
V , ZENER VOLTAGE (V)
Fig. 3  Typical Zener Breakdown Characteristics
Z
10 20 30 40
T = 25°C
j
Test current I
Z
Nominal Zener Breakdown
Voltage
10
12
18
22
27
33 36
15
39
1
10
100
1,000
110100
C
, 
T
O
T
AL 
C
A
P
A
C
I
T
A
N
C
E (p
F
)
T
V , NOMINAL ZENER VOLTAGE (V)
Fig. 4  Typical Total Capacitance vs. Nominal Zener Voltage
Z
0V BIAS
1
10
100
1,000
110
V , ZENER VOLTAGE (V)
Fig. 5  Typical Zener Impedance Characteristics
Z
100
Z , ZENER IMPEDANCE( )
Z
Ω
1
10
100
110 100
P
, 
P
EAK S
U
R
G
E 
P
O
WE
R
 (W)
PK
PULSE WIDTH (ms)
Fig. 6  Maximum Non-repetitive Surge Power
1,000
MMBZ5221BS - MMBZ5259BS 
Document number: DS31039  Rev. 15 - 2 
3 of 4 
www.diodes.com   June 2008
© Diodes Incorporated 
 Device Packaging Shipping
TI H H
U U U
Year 2002 2003 2004 2005 2006 2001 2003 2009
Code P Q R s T u v w
SOT-363
Dim Min Max
A 010 0.30
B 1,15 1.35
C 200 2.20
D 0,66Nominal
F 0,40 0.45
H 1,80 2.20
J 0 0.10
K 090 1.00
L 025 0.40
M 010 0.22
a
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
0+0
T T
4L+ + +4L
 
 
 
 
 
ii
Dimensions
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Device Packaging Shipping
TI H H
U U U
Year 2002 2003 2004 2005 2006 2001 2003 2009
Code P Q R s T u v w
SOT-363
Dim Min Max
A 010 0.30
B 1,15 1.35
C 200 2.20
D 0,66Nominal
F 0,40 0.45
H 1,80 2.20
J 0 0.10
K 090 1.00
L 025 0.40
M 010 0.22
a
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
0+0
T T
4L+ + +4L
 
 
 
 
 
ii
Dimensions
 
 
 
 
 
 
 
 
 
 
MMBZ5221BS - MMBZ5259BS 
Document number: DS31039  Rev. 15 - 2 
4 of 4 
www.diodes.com   June 2008
© Diodes Incorporated 
 MMBZ5221BS - MMBZ5259BS
Ordering Information  (Note 7) 
Device Packaging Shipping 
(Type Number)-7-F  SOT-363  3000/Tape & Reel 
*Add “-7” to the appropriate type number in Electrical Characteristics Table on Page 2. Example:  6.2V Zener = MMBZ5234BS-7-F. 
Notes:  7.    For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf. 
Marking Information 
Kxx  YM
Kxx  YM
 Kxx = Product Type Marking Code 
(See Electrical Characteristics Table) 
YM = Date Code Marking 
Y = Year (ex: N = 2002) 
M = Month (ex: 9 = September) 
Date Code Key 
Year 2002  2003  2004  2005  2006  2007 2008 2009 2010 2011 2012 2013 2014 2015 
Code P  Q  R  S  T  U  V  W  X Y Z A B C 
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 
Code  1 2 3 4 5 6 7 8 9 O N D 
Package Outline Dimensions 
Suggested Pad Layout 
IMPORTANT NOTICE 
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes 
without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product 
described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall 
assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, 
harmless against all damages.  LIFE SUPPORT 
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written 
approval of the President of Diodes Incorporated. 
SOT-363 
Dim  Min  Max 
A  0.10  0.30 
B  1.15  1.35 
C  2.00  2.20 
D  0.65 Nominal 
F  0.40  0.45 
H  1.80  2.20 
J  0  0.10 
K  0.90  1.00 
L  0.25  0.40 
M  0.10  0.22 
α  0° 8° 
All Dimensions in mm 
A
M
JL
D
B C
H
K
F
X
Z
Y
C
EE
G
Dimensions Value (in mm) 
Z  2.5 
G  1.3 
X  0.42 
Y  0.6 
C  1.9 
E  0.65 
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