BYT44
Vishay Telefunken
www.vishay.de
FaxBack +1-408-970-5600
Rev. 3, 24-Jun-98
1 (4)
Document Number 86027
Super Fast Soft Recovery Rectifier
Features
D
Miniature axial leaded
D
Glass passivated
D
Hermetically sealed glass envelope
D
Low reverse current
Applications
High frequency circuits
Freewheeling diodes in SMPS
95 10526
Absolute Maximum Ratings
T
j
= 25
_
C
Parameter
Test Conditions
Type
Symbol
Value
Unit
Reverse voltage
BYT44A
V
R
50
V
g
=Repetitive peak reverse voltage
BYT44B
R
=V
RRM
100
V
BYT44C
150
V
BYT44D
200
V
Peak forward surge current
t
p
=8.3 ms, half sinewave
I
FSM
30
A
Average forward current
Lead length l = 10 mm,
T
L
= 25
C
I
FAV
1.5
A
Junction and storage
temperature range
T
j
=T
stg
55...+175
C
Maximum Thermal Resistance
T
j
= 25
_
C
Parameter
Test Conditions
Symbol
Value
Unit
Junction ambient
Lead length l = 10 mm, T
L
= constant
R
thJA
60
K/W
on PC board with spacing 25mm
R
thJA
110
K/W
Electrical Characteristics
T
j
= 25
_
C
Parameter
Test Conditions
Type
Symbol
Min
Typ
Max
Unit
Forward voltage
I
F
=1A
V
F
1.1
V
Reverse current
V
R
=V
RRM
I
R
5
m
A
V
R
=V
RRM
, T
j
=150
C
I
R
150
m
A
Reverse breakdown voltage
I
R
=100
m
A
BYT44A
V
(BR)R
50
V
g
R
m
BYT44B
V
(BR)R
100
V
BYT44C
V
(BR)R
150
V
BYT44D
V
(BR)R
200
V
Reverse recovery time
I
F
=0.5A, I
R
=1A, i
R
=0.25A
t
rr
25
ns
BYT44
Vishay Telefunken
www.vishay.de
FaxBack +1-408-970-5600
Rev. 3, 24-Jun-98
2 (4)
Document Number 86027
Characteristics (T
j
= 25
_
C unless otherwise specified)
0
0
20
40
60
80
120
R
Therm. Resist. Junction /
Ambient ( K/W
)
thJA
l Lead Length ( mm )
96 12151
5
10
15
25
30
20
100
l
l
T
L
=constant
Figure 1. Max. Thermal Resistance vs. Lead Length
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
0
20
40
60
80 100 120 140 160 180
T
amb
Ambient Temperature (
C )
96 12148
I
A
verage
Forward
Current
(
A
)
FA
V
V
R
= V
R RM
f
v1kHz
R
thJA
v110K/W
PC Board
Figure 2. Max. Average Forward Current vs.
Ambient Temperature
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
0
20
40
60
80 100 120 140 160 180
T
amb
Ambient Temperature (
C )
96 12149
I
A
verage
Forward
Current
(
A
)
FA
V
V
R
= V
R RM
f
v1kHz
R
thJA
v60K/W
l=10mm
Figure 3. Max. Average Forward Current vs.
Ambient Temperature
1
10
100
1000
25
50
75
100
125
150
175
T
j
Junction Temperature (
C )
96 12150
V
R
= V
RRM
m
I Reverse Current (
A
)
R
Figure 4. Max. Reverse Current vs.
Junction Temperature
0.001
0.010
0.100
1.000
10.000
100.000
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
V
F
Forward Voltage ( V )
96 12147
F
I Forward Current (
A
)
T
j
= 25
C
T
j
= 175
C
Figure 5. Max. Forward Current vs. Forward Voltage
BYT44
Vishay Telefunken
www.vishay.de
FaxBack +1-408-970-5600
Rev. 3, 24-Jun-98
4 (4)
Document Number 86027
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating
systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs ).
The Montreal Protocol ( 1987 ) and its London Amendments ( 1990 ) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of
ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA ) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer application
by the customer. Should the buyer use Vishay-Telefunken products for any unintended or unauthorized application, the
buyer shall indemnify Vishay-Telefunken against all claims, costs, damages, and expenses, arising out of, directly or
indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
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