DS30267 Rev. 5 - 2 1 of 3 MMBZ5221BT - MMBZ5259BT
www.diodes.com ã Diodes Incorporated
MMBZ5221BT - MMBZ5259BT
150mW SURFACE MOUNT ZENER DIODE
Features
·Ultra-Small Surface Mount Package
·Planar Die Construction
·General Purpose
·Ideally Suited for Automated Assembly
Processes
·Also Available in Lead Free Version
Mechanical Data
A
M
JL
D
BC
H
K
G
N
Characteristic Symbol Value Unit
Zener Current (See Table on page 2) ¾¾¾
Forward Voltage @ IF = 10mA VF0.9 V
Power Dissipation (Note 1) Pd150 mW
Thermal Resistance, Junction to Ambient (Note 1) RqJA 833 °C/W
Operating and Storage Temperature Range Tj, TSTG -65 to +150 °C
Notes: 1. Device mounted on FR-4 PC board with recommended pad layout at http://www.diodes.com/datasheets/ap02001.pdf.
Maximum Ratings @ TA = 25°C unless otherwise specified
·Case: SOT-523, Molded Plastic
·Case material - UL Flammability Rating
Classification 94V-0
·Moisture sensitivity: Level 1 per J-STD-020A
·Terminals: Solderable per MIL-STD-202,
Method 208
·Also Available in Lead Free Plating (Matte Tin
Finish). Please see Ordering Information,
Note 5, on Page 2
·Polarity: See Diagram
·Marking: See Table, Sheet 2 and Below
·Weight: 0.002 grams (approx.)
·Ordering Information, see Sheet 2
TCUDORPWEN
SOT-523
Dim Min Max Typ
A0.15 0.30 0.22
B0.75 0.85 0.80
C1.45 1.75 1.60
D¾¾0.50
G0.90 1.10 1.00
H1.50 1.70 1.60
J0.00 0.10 0.05
K0.60 0.80 0.75
L0.10 0.30 0.22
M0.10 0.20 0.12
N0.45 0.65 0.50
a0°8°¾
All Dimensions in mm
Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec
Code 1234567
89 OND
Year 2002 2003 2004 2005 2006 2007 2008 2009
Code NPRST
UVW
Date Code Key
KXX = Product Type Marking Code
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
KXXYM
Marking Information
SPICE MODELS: MMBZ5221BT MMBZ5223BT MMBZ5225BT MMBZ5226BT MMBZ5227BT MMBZ5228BT MMBZ5229BT 
MMBZ5230BT MMBZ5231BT MMBZ5232BT MMBZ5234BT MMBZ5235BT MMBZ5236BT MMBZ5237BT MMBZ5239BT 
MMBZ5240BT MMBZ5241BT MMBZ5242BT MMBZ5243BT MMBZ5245BT MMBZ5246BT MMBZ5248BT MMBZ5250BT 
MMBZ5251BT MMBZ5252BT MMBZ5254BT MMBZ5255BT MMBZ5256BT MMBZ5257BT MMBZ5258BT MMBZ5259BT
DS30267 Rev. 5 - 2 2 of 3 MMBZ5221BT - MMBZ5259BT
www.diodes.com
Electrical Characteristics @ TA = 25°C unless otherwise specified
Type
Number
Marking
Code
Zener Voltage Range (Note 2) Test
Current
Maximum Zener Impedance
(Note 4)
Maximum Reverse
Leakage Current (Note 2)
VZ @ IZT IZT ZZT @ IZT ZZK @ IZK
= 0.25mA
I
R@V
R
Nom (V) Min (V) Max (V) mA WmAV
MMBZ5221BT KC1 2.4 2.28 2.52 20 30 1200 100 1.0
MMBZ5223BT KC3 2.7 2.57 2.84 20 30 1300 75 1.0
MMBZ5225BT KC5 3.0 2.85 3.15 20 30 1600 50 1.0
MMBZ5226BT KG1 3.3 3.14 3.47 20 28 1600 25 1.0
MMBZ5227BT KG2 3.6 3.42 3.78 20 24 1700 15 1.0
MMBZ5228BT KG3 3.9 3.71 4.10 20 23 1900 10 1.0
MMBZ5229BT KG4 4.3 4.09 4.52 20 22 2000 5.0 1.0
MMBZ5230BT KG5 4.7 4.47 4.94 20 19 1900 5.0 2.0
MMBZ5231BT KE1 5.1 4.85 5.36 20 17 1600 5.0 2.0
MMBZ5232BT KE2 5.6 5.32 5.88 20 11 1600 5.0 3.0
MMBZ5234BT KE4 6.2 5.89 6.51 20 7.0 1000 5.0 4.0
MMBZ5235BT KE5 6.8 6.46 7.14 20 5.0 750 3.0 5.0
MMBZ5236BT KF1 7.5 7.13 7.88 20 6.0 500 3.0 6.0
MMBZ5237BT KF2 8.2 7.79 8.61 20 8.0 500 3.0 6.5
MMBZ5239BT KF4 9.1 8.65 9.56 20 10 600 3.0 7.0
MMBZ5240BT KF5 10 9.50 10.50 20 17 600 3.0 8.0
MMBZ5241BT KH1 11 10.45 11.55 20 22 600 2.0 8.4
MMBZ5242BT KH2 12 11.40 12.60 20 30 600 1.0 9.1
MMBZ5243BT KH3 13 12.35 13.65 9.5 13 600 0.5 9.9
MMBZ5245BT KH5 15 14.25 15.75 8.5 16 600 0.1 11
MMBZ5246BT KJ1 16 15.20 16.80 7.8 17 600 0.1 12
MMBZ5248BT KJ3 18 17.10 18.90 7.0 21 600 0.1 14
MMBZ5250BT KJ5 20 19.00 21.00 6.2 25 600 0.1 15
MMBZ5251BT KK1 22 20.90 23.10 5.6 29 600 0.1 17
MMBZ5252BT KK2 24 22.80 25.20 5.2 33 600 0.1 18
MMBZ5254BT KK4 27 25.65 28.35 5.0 41 600 0.1 21
MMBZ5255BT KK5 28 26.60 29.40 4.5 44 600 0.1 21
MMBZ5256BT KM1 30 28.50 31.50 4.2 49 600 0.1 23
MMBZ5257BT KM2 33 31.35 34.65 3.8 58 700 0.1 25
MMBZ5258BT KM3 36 34.20 37.80 3.4 70 700 0.1 27
MMBZ5259BT KM4 39 37.05 40.95 3.2 80 800 0.1 30
TCUDORPWEN
TABLE 1
Ordering Information (Note 3)
Device Packaging Shipping
(Type Number)-7* SOT-523 3000/Tape & Reel
* Add “-7” to the appropriate type number in Table 1 above. Example: 6.2V Zener = MMBZ5234BT-7.
Notes: 2. Short duration test pulse used to minimize self-heating effect.
3. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
4. f = 1KHz.
5. For Lead Free version (with Lead Free terminal finish) part number, please add "-F" suffix to part number above.
Example: MMBZ5259BT-7-F.
DS30267 Rev. 5 - 2 3 of 3 MMBZ5221BT - MMBZ5259BT
www.diodes.com
0
100
200
300
25
0
50 75 100 125
150
P , POWER DISSIPATION (mW)
D
T , AMBIENT TEMPERATURE (°C)
A
Fi
g
. 1 Power Dissipation vs Ambient Temperature
TCUDORPWEN
C , TOTAL CAPACITANCE (pF)
T
10
100
1000
10 100
1
V , NOMINAL ZENER VOLTAGE (V)
Z
Fig. 2 Total Capacitance vs Nominal Zener Voltage
T=25°C
j
V=1V
R
V=2V
R
1
10
100
110 100
P , PEAK SURGE POWER (W)
PK
PULSE WIDTH (ms)
Fi
g
. 4 Maximum Non-repetitive Sur
g
e Power
1000
1
10
100
1000
1 10 100
V , NOMINAL ZENER VOLTAGE (V)
Z
Fig. 3 Zener Voltage vs. Zener Impedence
I = 1.0mA
Z
0
10
20
30
0
I , ZENER CURRENT (mA)
Z
V , ZENER VOLTAGE (V)
Z
Fi
g
. 6 Zener Breakdown Characteristics
10 20 30 40
T = 25°C
j
Test current IZ
10
12
18
22
27
33 36
15
39
Nominal Zener Voltage
0
10
20
30
40
50
01 2 3 4 5 6 78910
I , ZENER CURRENT (mA)
Z
V , ZENER VOLTAGE (V)
Z
Fi
g
. 5 Zener Breakdown Characteristics
T = 25°C
j5V6
6V8
8V2
Test Current IZ
20mA