BZX84C43 - BZX84C51
350mW SURFACE MOUNT ZENER DIODE
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Features
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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
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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
Forward Voltage
@T
A
= 25°C unless otherwise specified
@ I
F
= 10mA
Symbol
V
F
Value
0.9
Unit
V
Characteristic
Thermal Characteristics
Characteristic
Power Dissipation
(Note 1)
Power Dissipation
(Note 2)
Thermal Resistance, Junction to Ambient Air
Thermal Resistance, Junction to Ambient Air
Operating and Storage Temperature Range
Symbol
P
D
P
D
R
θ
JA
R
θ
JA
T
J,
T
STG
Value
300
350
417
357
-65 to +150
Unit
mW
mW
°C/W
°C/W
°C
(Note 1)
(Note 2)
Electrical Characteristics
@T
A
= 25°C unless otherwise specified
Maximum Reverse
Current
(Note 5)
I
R
(μA)
0.1
0.1
0.1
V
R
(V)
30.1
32.9
35.7
Typical
Temperature
Coefficient
@ I
ZT
mV/°C
Min
10.0
10.0
10.0
Max
12.0
12.0
12.0
Type
Number
Type
Code
Zener Voltage
Range
(Note 5)
V
Z
@ I
ZT
Nom (V) Min (V)
43
40.0
47
44.0
51
48.0
I
ZT
(mA)
2.0
2.0
2.0
Maximum Zener Impedance
(Note 4)
Z
ZT
@ I
ZT
(Ω)
150
170
180
Z
ZK
@ I
ZK
(mA)
(Ω)
375
0.5
375
0.5
400
0.5
BZX84C43
BZX84C47
BZX84C51
Notes:
Y15/KYF
Y16/KYG
Y17/KYH
Max (V)
46.0
50.0
54.0
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 Sb
2
O
3
Fire Retardants.
BZX84C43 - BZX84C51
Document number: DS30370 Rev. 6 - 2
1 of 3
www.diodes.com
May 2008
© Diodes Incorporated
BZX84C43 - BZX84C51
500
10
T
J
= 25°C
C43
C47
C51
P
D
, POWER DISSIPATION (mW)
I
Z
, ZENER CURRENT (mA)
400
8
300
Note 1
Note 2
6
200
4
Test Current I
Z
2mA
100
2
0
0
100
T
A
, AMBIENT TEMPERATURE (°C)
Fig. 1 Power Derating Curve
200
0
0
20
30
40
50
70
60
V
Z
, ZENER VOLTAGE (V)
Fig. 2 Typical Zener Breakdown Characteristics
10
100
C
T
, TOTAL CAPACITANCE (pF)
10
1
100
V
Z
, NOMINAL ZENER VOLTAGE (V)
Fig. 3 Typical Total Capacitance vs. Nominal Zener Voltage
10
Ordering Information
Part Number
(Type Number)-7-F*
(Note 7)
Case
SOT-23
Packaging
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 = Product Type Marking Code
(See Electrical Characteristics Table)
YM = Date Code Marking
Y = Year ex: T = 2006
M = Month (ex: 9 = September)
xx = Product Type Marking Code
(See Electrical Characteristics Table)
YM = Date Code Marking
Y = Year ex: T = 2006
M = Month (ex: 9 = September)
YM
2010
X
Jun
6
Date Code Key
Year
Code
Month
Code
2006
T
Jan
1
2007
U
Feb
2
Mar
3
2008
V
Apr
4
2009
W
May
5
2011
Y
Jul
7
BZX84C43 - BZX84C51
Document number: DS30370 Rev. 6 - 2
2 of 3
www.diodes.com
xx
8
Kxx
YM
2012
Z
Aug
Sep
9
2013
A
Oct
O
2014
B
Nov
N
2015
C
Dec
D
May 2008
© Diodes Incorporated
BZX84C43 - BZX84C51
Package Outline Dimensions
A
B C
G
H
K
M
J
D
F
L
Dim
A
B
C
D
F
G
H
J
K
L
M
α
SOT-23
Min
0.37
1.20
2.30
0.89
0.45
1.78
2.80
0.013
0.903
0.45
0.085
0°
Max
0.51
1.40
2.50
1.03
0.60
2.05
3.00
0.10
1.10
0.61
0.180
8°
Suggested Pad Layout
Y
Z
C
Dimensions Value (in mm)
Z
2.9
X
0.8
Y
0.9
C
2.0
E
1.35
X
E
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.
BZX84C43 - BZX84C51
Document number: DS30370 Rev. 6 - 2
3 of 3
www.diodes.com
May 2008
© Diodes Incorporated
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