1SMB5920B – 1SMB5939B
Document number: DS32125 Rev. 5 - 2 1 of 5
www.diodes.com April 2011
© Diodes Incorporated
1SMB5920B
–
1SMB5939B
NEW PRODUCT
3.0W SURFACE MOUNT POWER ZENER DIODE
Features
• 3.0W Power Dissipation
• Ideally Suited for Automated Assembly
• 6.2V - 39V Nominal Zener Voltage Range
• Standard VZ Tolerance is ± 5%
• ESD Rating of Class 3 (>16kV) per Human Body Model
• Lead Free Finish/RoHS Compliant (Note 1)
• Green Molding Compound (No Halogen and Antimony)
Mechanical Data
• Case: SMB
• Case Material: Molded Plastic. UL Flammability Classification
Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020
• Terminals: Lead Free Plating (Matte Tin Finish). Solderable per
MIL-STD-202, Method 208
• Polarity: Cathode Band
• Weight: 0.096 grams (approximate)
Ordering Information (Note 2)
Device* Packaging Shipping
1SMB59xxB-13 SMB 3000/Tape & Reel
*x = Device Voltage, e.g., 1SMB5920B-13.
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
2. For packaging details, go to our website at http://www.diodes.com.
Marking Information
Top View Bottom View
Green
B9xx = Product type marking code
(See Electric Characteristics Table)
= Manufacturers’ code marking
YWW = Date code marking
Y = Last digit of year (ex: 1 for 2011)
WW = Week code (01 - 53)
YWW
B9xx
1SMB5920B – 1SMB5939B
Document number: DS32125 Rev. 5 - 2 2 of 5
www.diodes.com April 2011
© Diodes Incorporated
1SMB5920B
–
1SMB5939B
NEW PRODUCT
Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Forward Voltage @IF = 200mA VF 1.5 V
Zener Current (see Table page 2) IZM P
D / VZ mA
Thermal Characteristics
Characteristic Symbol Value Unit
Power Dissipation @TL = 75°C
Derate Above 75°C (Note 2) PD 3.0
40 W
mW/°C
Thermal Resistance - Junction to Terminal (Note 2) R
θ
JT 25 °C/W
Power Dissipation @TA = 25°C
Derate Above 25°C (Note 2) PD 550
4.4 mW
mW/°C
Thermal Resistance - Junction to Ambient (Note 2) R
θ
JA 228 °C/W
Operating and Storage Temperature Range TJ, TSTG -65 to +150 °C
Electrical Characteristics @TA = 25°C unless otherwise specified
Type
Number Marking
Code
Zener Voltage
Range (Note 4) Test
Current Maximum Zener Impedance (Note 5) Maximum
Reverse Current
(Note 4) IZM Max
VZ
@
IZT IZT Z
ZT
@
IZT Z
ZK
@
IZ
K
I
R
@
V
R
Min (V) Typ (V) Max (V) mA Ω Ω mA µA V mA
1SMB5920B B920 5.89 6.2 6.51 60.5 2 200 1 5 4 241
1SMB5921B B921 6.46 6.8 7.14 55.1 2.5 200 1 5 5.2 220
1SMB5922B B922 7.12 7.5 7.88 50 3 400 0.5 5 6 200
1SMB5923B B923 7.79 8.2 8.61 45.7 3.5 400 0.5 5 6.5 182
1SMB5924B B924 8.64 9.1 9.56 41.2 4 500 0.5 5 7 164
1SMB5925B B925 9.5 10 10.5 37.5 4.5 500 0.25 5 8 150
1SMB5926B B926 10.45 11 11.55 34.1 5.5 550 0.25 1 8.4 136
1SMB5927B B927 11.4 12 12.6 31.2 6.5 550 0.25 1 9.1 125
1SMB5928B B928 12.35 13 13.65 28.8 7 550 0.25 1 9.9 115
1SMB5929B B929 14.25 15 15.75 25 9 600 0.25 1 11.4 100
1SMB5930B B930 15.2 16 16.8 23.4 10 600 0.25 1 12.2 93
1SMB5931B B931 17.1 18 18.9 20.8 12 650 0.25 1 13.7 83
1SMB5932B B932 19 20 21 18.7 14 650 0.25 1 15.2 75
1SMB5933B B933 20.9 22 23.1 17 17.5 650 0.25 1 16.7 68
1SMB5934B B934 22.8 24 25.2 15.6 19 700 0.25 1 18.2 62
1SMB5935B B935 25.65 27 28.35 13.9 23 700 0.25 1 20.6 55
1SMB5936B B936 28.5 30 31.5 12.5 28 750 0.25 1 22.8 50
1SMB5937B B937 31.35 33 34.65 11.4 33 800 0.25 1 25.1 45
1SMB5938B B938 34.2 36 37.8 10.4 38 850 0.25 1 27.4 41
1SMB5939B B939 37.05 39 40.95 9.6 45 900 0.25 1 29.7 38
Notes: 3. Device mounted on FR-4 PCB; pad layout as shown on Diodes In c. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com.
4. Short duration pulse test used to minimize self-heating effect.
5. ZENER IMPEDANCE (ZZ) DERIVATION ZZT and ZZK are measured by dividing the ac voltage drop across the device by the ac current applied. The
specified limits are for IZ(ac) = 0.1 IZ(dc) with the ac frequency = 60 Hz.
1SMB5920B – 1SMB5939B
Document number: DS32125 Rev. 5 - 2 3 of 5
www.diodes.com April 2011
© Diodes Incorporated
1SMB5920B
–
1SMB5939B
NEW PRODUCT
050 100 150
T , AMBIENT TEMPERA TURE ( C)
Fi g. 1 Power D i s sipat ion vs. Ambi en t Tem per ature
A
°
125
7525
0
1
2
3
4
5
6
P
, MAXIM
U
M
P
O
WE
R
DISSI
P
A
T
I
O
N (W)
D
T
L
T
A
Note 3
0
5
10
15
20
25
30
35
40
0 5 10 15 20 25 30 35 40
T
C
of V ,
T
EM
P
E
R
A
T
U
R
E
C
O
E
F
F
I
C
IE
N
T
OF ZENER VOLTAGE (mV /°C)
Z
V , ZENER VOLTAGE (V)
Z
Fig . 2 Typical Temperatur e C oefficient of
Zener V oltage vs. Zener Voltage
0.1
1
10
100
0 1020304050
V , ZENER VOLTAGE (V)
Fig. 3 Typical Characteristics
Z
Zener Breakdown
I, ZENE
R
C
U
R
R
EN
T
(mA)
Z
6.2V 13V 15V 39V
110100
V , ZENER VOLTAGE (V)
Z
Fig. 4 Effect of Zener Vo ltage
Z, D
Y
NAMI
C
IM
P
EDAN
C
E (
)
Z
Ω
1
10
1,000
100
1mA
10mA
20mA
110100
I , ZENER TEST CURRENT (mA)
Z
Fi g. 5 Effect of Zene r Cu r r en t
Z, D
Y
NAMI
C
IM
P
EDAN
C
E ( )
Z
Ω
1
10
100
13V
15V
6.2V
39V
010203040
V , REVERSE VOL TAGE (V)
Fig. 6 Typical Total Capacitance vs. Reverse Voltage
R
0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
C
,
T
O
T
AL
C
A
P
A
C
I
T
A
N
C
E (p
F
)
T
V = 0V
R
f = 1MHz
V = V
RZ
/2
1SMB5920B – 1SMB5939B
Document number: DS32125 Rev. 5 - 2 4 of 5
www.diodes.com April 2011
© Diodes Incorporated
1SMB5920B
–
1SMB5939B
NEW PRODUCT
0t, TIME ( s)
Fig. 7 Pulse W aveform
μ
20 40 60
100
50
0
I , PEAK PULSE CURRENT (%I )
PppP
I , PEAK PULSE CURRENT (%I )
Ppp
t, TIME (ms)
Fig. 8 Pulse W aveform
0.01
0.1
1
10
0.01 0.1 1 10
t , PULSE DURATION (ms)
d
Fig. 9 Max. Peak Pulse Power vs. Pulse Duration
P
,
P
EAK
P
U
LSE
P
O
WE
R
(kW)
PK
Package Outline Dimensions
SMB
Dim Min Max
A 3.30 3.94
B 4.06 4.57
C 1.96 2.21
D 0.15 0.31
E 5.00 5.59
G 0.05 0.20
H 0.76 1.52
J 2.00 2.50
All Dimensions in mm
A
B
C
D
G
HE
J
1SMB5920B – 1SMB5939B
Document number: DS32125 Rev. 5 - 2 5 of 5
www.diodes.com April 2011
© Diodes Incorporated
1SMB5920B
–
1SMB5939B
NEW PRODUCT
Suggested Pad Layout
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein 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 Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated p roducts for any unintended or una uthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign p atents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their pro ducts and an y
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2011, Diodes Incorporated
www.diodes.com
Dimensions Value (in mm)
Z 6.8
G 1.8
X 2.3
Y 2.5
C 4.3
Z
X
C
G
Y
