BZX84C43 - BZX84C51
350mW SURFACE MOUNT ZENER DIODE
Features
• Planar Die Construction
• 350mW Power Dissipation
• Zener Voltages from 43V - 51V
• Ideally Suited for Automated Assembly Processes
• Lead, Halogen and Antimony Free, RoHS Compliant
"Green" Device (Notes 3 and 6)
Mechanical Data
• Case: SOT-23
• 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 2
• Ordering Information: See Page 2
• Weight: 0.008 grams (approximate)
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 300 mW
Power Dissipation (Note 2) PD 350 mW
Thermal Resistance, Junction to Ambient Air (Note 1) RθJA 417 °C/W
Thermal Resistance, Junction to Ambient Air (Note 2) RθJA 357 °C/W
Operating and Storage Temperature Range TJ, TSTG -65 to +150 °C
Electrical Characteristics @TA = 25°C unless otherwise specified
Zener Voltage
Range
(Note 5)
Maximum Zener Impedance
(Note 4)
Maximum Reverse
Current
(Note 5)
Typical
Temperature
Coefficient
@ IZT
mV/°C
VZ @ IZT IZT ZZT @ IZT ZZK @ IZK IR VR
Type
Number Type
Code
Nom (V) Min (V) Max (V) (mA) (Ω) (Ω) (mA) (μA) (V) Min Max
BZX84C43 Y15/KYF 43 40.0 46.0 2.0 150 375 0.5 0.1 30.1 10.0 12.0
BZX84C47 Y16/KYG 47 44.0 50.0 2.0 170 375 0.5 0.1 32.9 10.0 12.0
BZX84C51 Y17/KYH 51 48.0 54.0 2.0 180 400 0.5 0.1 35.7 10.0 12.0
Notes: 1. Device mounted on FR-4 PC board with recommended pad layout, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
2. Valid provided the terminals are kept at ambient temperature.
3. No purposefully added lead. Halogen and Antimony Free.
4. f = 1KHz.
5. Short duration pulse test used to minimize self-heating effect.
6. Product manufactured with Data Code V9 (week 33, 2008) and newer are built with Green Molding Compound. Product manufactured prior to Date
Code V9 are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants.
BZX84C43 - BZX84C51
Document number: DS30370 Rev. 6 - 2 1 of 3
www.diodes.com May 2008
© Diodes Incorporated
BZX84C43 - BZX84C51
400
T , AMBIENT TEMPERATURE (°C)
Fig. 1 Power Deratin g Curve
A
P
,
P
O
WE
R
DISSI
P
A
T
I
O
N (mW)
D
200
100
300
0
500
0100 200
Note 1 Note 2
0
2
4
6
8
10
10
020 30 40 50 60 70
I, ZE
N
E
R
C
U
R
R
E
N
T
(mA)
Z
V , ZENER VOLTAGE (V)
Fi g. 2 Typi ca l Zener Br eak down C har ac t eri stics
Z
T = 25°C
J
Test Current I
2mA
Z
C43
C47
C51
C , TOTAL CAPACIT A NCE (pF)
T
1
10
100
100
10 V , NOMINAL ZENER VOLTAGE (V)
Fig. 3 Typical Total Capacitance vs. Nominal Zener Voltage
Z
Ordering Information (Note 7)
Part Number Case Packaging
(Type Number)-7-F* SOT-23 3000/Tape & Reel
*Add “-7” to the appropriate type number in Electrical Characteristics Table on Page 2. Example: 43V Zener = BZX84C43-7-F.
Notes: 7. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
Kxx
YM
xx
YM
Kxx = Product Type Marking Code
(See Electrical Characteristics Table)
YM = Date Code Marking
Y = Year ex: T = 2006
M = Month
(
ex: 9 = Se
p
tember
)
xx = Product Type Marking Code
(See Electrical Characteristics Table)
YM = Date Code Marking
Y = Year ex: T = 2006
M = Month
(
ex: 9 = Se
p
tember
)
Date Code Key
Year 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
Code 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
BZX84C43 - BZX84C51
Document number: DS30370 Rev. 6 - 2 2 of 3
www.diodes.com May 2008
© Diodes Incorporated
BZX84C43 - BZX84C51
Package Outline Dimensions
BZX84C43 - BZX84C51
Document number: DS30370 Rev. 6 - 2 3 of 3
www.diodes.com May 2008
© Diodes Incorporated
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 an y 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.
A
M
JL
DF
BC
H
K
G
SOT-23
Dim Min Max
A 0.37 0.51
B 1.20 1.40
C 2.30 2.50
D 0.89 1.03
F 0.45 0.60
G 1.78 2.05
H 2.80 3.00
J 0.013 0.10
K 0.903 1.10
L 0.45 0.61
M 0.085 0.180
α 0° 8°
X E
Y
C
Z
Dimensions Value (in mm)
Z 2.9
X 0.8
Y 0.9
C 2.0
E 1.35
