DS30370 Rev. 1 - 2
1 of 3
BZX84C43 - BZX84C51
www.diodes.com
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
Mechanical Data
A
E
J
L
TOP VIEW
M
B
C
H
G
D
K
Characteristic
Symbol
Value
Unit
Forward Voltage
@ I
F
= 10mA
V
F
0.9
V
Power Dissipation (Note 1)
P
d
350
mW
Thermal Resistance, Junction to Ambient Air (Note 1)
R
qJA
357
C/W
Operating and Storage Temperature Range
T
j,
T
STG
-65 to +150
C
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.
Maximum Ratings
@ T
A
= 25
C unless otherwise specified
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
E
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
a
0
8
All Dimensions in mm
Case: SOT-23, Molded Plastic
Case material - UL Flammability Rating 94V-0
Moisture sensitivity: Level 1 per J-STD-020A
Terminals: Solderable per MIL-STD-202,
Method 208
Polarity: See Diagram
Marking: Marking Code (See Table on Page 2)
Weight: 0.008 grams (approx.)
DS30370 Rev. 1 - 2
2 of 3
BZX84C43 - BZX84C51
www.diodes.com
Electrical Characteristics
@ T
A
= 25
C unless otherwise specified
Notes:
2. Short duration test pulse used to minimize self-heating effect.
3. f = 1KHz.
Type
Number
Marking
Code
Zener Voltage
Range
(Note 2)
Maximum Zener
Impedance
(Note 3)
Maximum Reverse
Current
(Note 2)
Typical Temperature
Coefficient
@ I
ZT
mV/
C
V
Z
@ I
ZT
I
ZT
Z
ZT
@
I
ZT
Z
ZK
@ I
ZK
I
R
V
R
Min
Max
Nom (V) Min (V) Max (V)
(mA)
(
W)
(
W)
(mA)
(
mA)
(V)
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
400
T , Ambient Temperature, (C)
A
Fig. 1 Power Derating Curve
P
,
POWER
D
ISSIP
A
TION
(mW)
d
See Note 1
200
100
300
0
500
0
100
200
0
2
4
6
8
10
10
20
30
40
50
60
70
80
90 100
I
,
ZENER
CURRENT
(mA)
Z
V , ZENER VOLTAGE (V)
Z
Fig. 2 Zener Breakdown Characteristics
Tj = 25C
Test Current I
Z
2mA
C43
C47
C51
C
,
T
O
T
A
L
C
AP
ACIT
ANCE
(pF)
T
1
10
100
100
10
V , NOMINAL ZENER VOLTAGE (V)
Z
Fig. 3 Total Capacitance vs Nominal Zener Voltage
T = 25C
j
f = 1MHz
V = 1V
R
V = 2V
R
DS30370 Rev. 1 - 2
3 of 3
BZX84C43 - BZX84C51
www.diodes.com
Notes:
4. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Ordering Information
(Note 4)
Month
Jan
Feb
March
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Code
1
2
3
4
5
6
7
8
9
O
N
D
Date Code Key
KXX = Product Type Marking Code (See Page 2)
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
KXX
YM
Marking Information (This part may be marked as Figure A or B Below)
Year
2001
2002
2003
2004
2005
2006
2007
2008
2009
Code
M
N
P
R
S
T
U
V
W
Device
Packaging
Shipping
(Type Number)-7*
SOT-23
3000/Tape & Reel
* Add "-7" to the appropriate type number in Table 1 (on Page 2). Example: 43V Zener = BZX84C43-7.
Figure A
Month
Jan
Feb
March
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Code
1
2
3
4
5
6
7
8
9
O
N
D
Year
2000
2001
2002
2003
2004
2005
2006
2007
2008
Code
M
N
P
R
S
T
U
V
W
Date Code Key
Figure B
YM
XX
XX = Product Type Marking Code (See Page 2)
YM = Date Code Marking
Y = Year ex: N = 2001
M = Month ex: 9 = September
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