Document
Surface Mount Zener Diodes
Features: *500mw Power Dissipation *Ideal for Surface Mountted Application *Zener Breakdown Voltage Range 2.4V to 110V
Mechanical Data: *Case : SOD-123 Molded plastic *Terminals: Solderable per MIL-STD-202, Method 208 *Polarity: Cathode Indicated by Polarity Band *Marking: Marking Code (See Table on Page 3) *Weigh: 0.01grams(approx)
SOD-123 Outline Dimensions
MMSZ5221B Series
SMALL SIGNAL ZENER DIODES
500m WATTS
1 2
SOD-123
Unit:mm
SOD-123
Dim Min
Max
A 2.55 2.85
B 1.40 1.80
C 0.95 1.35
D 0.50 0.70
E 0.30 REF
H - 0.10
J - 0.15
K 3.55 3.85
PIN 1. CATHODE 2. ANODE
WEITRON
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MMSZ5221B Series
WEITRON
Maximum Ratings and Electrical Characteristics (TA=25 C Unless Otherwise Noted)
Characteristics
Symbol
Value
Unit
Total Power Dissipation on FR-5 Board (1)
@TL =75 C Thermal Resistance Junction to Ambient Air(2)
PD R JA
500 340
mW C/W
Forward Voltage @ IF=10mA Junction and Storage Temperature Range
VF Tj,TSTG
0.9 -65 to+150
V C
-
-
NOTES:1. FR-5=3.5 1.5inches, using the on minimum recommedned footprint. 2.Thermal Resistance measurement obtained via infrared scan method.
ELECTRICAL CHARACTERISTICS
(TA = 25 C unles s otherwis e noted, V F = 0.9 V Max. @ IF = 10 mA)
Symbol
Parameter
V Z R evers e Zener Voltage @ IZT
IZT R evers e C urrent
ZZT Maximum Zener Impedance @ IZT
IR R evers e Leakage C urrent @ VR
V R R evers e Voltage
IF F orward C urrent
V F F orward Voltage @ IF
Izk R evers e C urrent
Zzk Maximun Zener Impedance @ Izk
Device Marking
I IF
VZ VR
IIRZT V F
V
Zener Voltage Regulator
Item MMSZ5221B
Series
Marking
XX=Specific Device Code (See Table on page3)
Equivalent Circuit Diagram
1
Cathode
2
Anode
WEITRON
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MMSZ5221B Series
E L E C T R IC A L C HA R A C T E R IS T IC S(TA = 25 C unless otherwise noted, V F = 0.9 V Max. @ IF = 10 mA)
Zener Voltage (Notes 3 and 4)
Zener Impedanc e(Note 5)
Device
MMS Z5221B MMS Z5222B MMS Z5223B MMS Z5224B MMS Z5225B
Device Marking
C1 C2 C3 C4 C5
V Z(Volts )
Min Nom Max
2.28 2.4 2.52 2.38 2.5 2.63 2.57 2.7 2.84 2.66 2.8 2.94 2.85 3.0 3.15
@ I ZT
mA
20 20 20 20 20
ZZT@ IZT
Ω
30 30 30 30 29
ZZK @ IZK
Ω mA
1200 1250 1300 1400 1600
0.25 0.25 0.25 0.25 0.25
MMS Z5226B MMS Z5227B MMS Z5228B MMS Z5229B MMS Z5230B
D1 3.14 3.3 3.47 20 D2 3.42 3.6 3.78 20 D3 3.71 3.9 4.10 20 D4 4.09 4.3 4.52 20 D5 4.47 4.7 4.94 20
28
1600
0.25
24
1700
0.25
23
1900
0.25
22
2000
0.25
19
1900
0.25
MMS Z5231B MMS Z5232B MMS Z5233B MMS Z5234B MMS Z5235B
E 1 4.85 5.1 5.36 20 E 2 5.32 5.6 5.88 20 E 3 5.70 6.0 6.30 20 E 4 5.89 6.2 6.51 20 E 5 6.46 6.8 7.14 20
17
1600
0.25
11
1600
0.25
7
1600
0.25
7
1000
0.25
5 750 0.25
MMS Z5236B MMS Z5237B MMS Z5238B MMS Z5239B MMS Z5240B
F1 7.13 7.5 7.88 20 F2 7.79 8.2 8.61 20 F3 8.27 8.7 9.14 20 F4 8.65 9.1 9.56 20 F5 9.50 10 10.50 20
6 500 0.25 8 500 0.25 8 600 0.25 10 600 0.25 17 600 0.25
MMS Z5241B MMS Z5242B MMS Z5243B MMS Z5244B M.