BY448 , BY458
Vishay Semiconductors
Standard Avalanche Sinterglass Diode
FEATURES
• Glass passivated junction
• Hermetically sealed package
• Compliant to RoHS directive 2002/95/EC and in
accordance to WEEE 2002/96/EC
• Halogen-free according to IEC 61249-2-21
definition
949539
APPLICATIONS
• High voltage rectification
• Efficiency diode in horizontal deflection circuits
MECHANICAL DATA
Case:
SOD-57
Terminals:
plated axial leads, solderable per MIL-STD-750,
method 2026
Polarity:
color band denotes cathode end
Mounting position:
any
Weight:
approx. 369 mg
PARTS TABLE
PART
BY448
BY458
TYPE DIFFERENTIATION
V
R
= 1500 V; I
FAV
= 2 A
V
R
= 1200 V; I
FAV
= 2 A
PACKAGE
SOD-57
SOD-57
ABSOLUTE MAXIMUM RATINGS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Reverse voltage
Peak forward surge current
Average forward current
Junction temperature
Storage temperature range
Non repetitive reverse avalanche energy
l
(BR)R
= 0.4 A
TEST CONDITION
See electrical characteristics
t
p
= 10 ms, half sine wave
PART
BY448
BY458
SYMBOL
V
R
= V
RRM
V
R
= V
RRM
I
FSM
I
FAV
T
j
T
stg
E
R
VALUE
1500
1200
30
2
140
- 55 to + 175
10
UNIT
V
V
A
A
°C
°C
mJ
MAXIMUM THERMAL RESISTANCE
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Junction ambient
TEST CONDITION
l = 10 mm, T
L
= constant
On PC board with spacing 25 mm
SYMBOL
R
thJA
R
thJA
VALUE
45
100
UNIT
K/W
K/W
ELECTRICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Forward voltage
Reverse current
Total reverse recovery time
Reverse recovery time
TEST CONDITION
I
F
= 3 A
V
R
= V
RRM
V
R
= V
RRM
, T
j
= 140 °C
I
F
= 1 A, - dI
F
/dt = 0.05 A/μs
I
F
= 0.5 A, I
R
= 1 A, i
R
= 0.25 A
SYMBOL
V
F
I
R
I
R
t
rr
t
rr
MIN.
-
-
-
-
-
TYP.
-
-
-
-
-
MAX
1.6
3
140
20
2
UNIT
V
μA
μA
μs
μs
Document Number: 86006
Rev. 1.7, 09-Aug-10
For technical questions within your region, please contact one of the following:
DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com
www.vishay.com
147
BY448 , BY458
Vishay Semiconductors
Standard Avalanche Sinterglass
Diode
TYPICAL CHARACTERISTICS
(T
amb
= 25
°C,
unless otherwise specified)
R
thJA
- Ther. Resist. Junction/Ambient (K/W)
120
l
100
l
V
R
= V
RRM
1000
I
R
- Reverse Current (μA)
15
20
25
30
80
T
L
= constant
60
40
20
0
0
949101
100
10
1
5
10
16419
25
50
75
100
125
150
l - Lead Length (mm)
T
j
- Junction Temperature (°C)
Fig. 1 - Typ. Thermal Resistance vs. Lead Length
Fig. 4 - Reverse Current vs. Junction Temperature
P
R
- Reverse Power Dissipation (mW)
100
T
j
= 150 °C
400
V
R
= V
RRM
350
300
250
200
150
100
50
0
25
50
75
100
125
150
P
R
- Limit at 80 % V
R
P
R
- Limit at 100 % V
R
I
F
- Forward Current (A)
10
1
T
j
= 25 °C
0.1
0.01
0.001
0
16417
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
16420
V
F
- Forward Voltage (V)
T
j
- Junction Temperature (°C)
Fig. 2 - Forward Current vs. Forward Voltage
Fig. 5 - Max. Reverse Power Dissipation vs. Junction Temperature
2.5
35
V
R
= V
RRM
I
FAV
- Average Forward Current (A)
f = 1 MHz
2.0
C
D
- Diode Capacitance (pF)
150
16421
half
sine
wave
R
thJA
= 45 K/W
l = 10 mm
30
25
20
15
10
5
0
1.5
1.0
0.5
R
thJA
= 100 K/W
PCB: d = 25 mm
0
0
16418
25
50
75
100
125
0.1
1
10
100
T
amb
- Ambient Temperature (°C)
V
R
- Reverse Voltage (V)
Fig. 3 - Max. Average Forward Current vs. Ambient Temperature
Fig. 6 - Diode Capacitance vs. Reverse Voltage
www.vishay.com
148
For technical questions within your region, please contact one of the following:
DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com
Document Number: 86006
Rev. 1.7, 09-Aug-10
BY448 , BY458
Standard Avalanche Sinterglass
Diode
PACKAGE DIMENSIONS
in millimeters (inches):
SOD-57
0.82 (0.032) max.
26 (1.024) min.
4 (0.157) max.
26 (1.024) min.
Vishay Semiconductors
Document Number: 86006
Rev. 1.7, 09-Aug-10
3.6 (0.142) max.
20543
For technical questions within your region, please contact one of the following:
DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com
www.vishay.com
149
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Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
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the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
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Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
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product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
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including but not limited to the warranty expressed therein.
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Document Number: 91000
Revision: 11-Mar-11
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