Datasheet S494D Datasheet (VISHAY)

Fast Soft Recovery Rectifier

Features

D

Hermetically sealed axial–leaded
glass envelope

D

Glass passivated

D

Very low reverse current

D

Soft recovery characteristics

S494D

Vishay Telefunken

Applications

Switched–mode power supplies
High–frequency inverter circuits
Electronic ballast

Absolute Maximum Ratings

Tj = 25_C

Parameter Test Conditions Type Symbol Value Unit

Reverse voltage
=Repetitive peak reverse voltage

Peak forward surge current tp=8.3ms, half–sinewave I
Average forward current l= 10mm, T
Junction and storage temperature range Tj=T

=38°C I

amb

=V

Maximum Thermal Resistance

Tj = 25_C

Parameter Test Conditions Symbol Value Unit

Junction ambient lead length l = 10mm, TL = constant R

thJA

95 10526

V

R

RRM

FSM

FAV

–65...+175°C

stg

60 K/W

600 V

30 A

1.25 A

Electrical Characteristics

Tj = 25_C

Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=1A V
Reverse current VR=V

Reverse recovery time IF=0.5A, IR=1A, iR=0.25A t

Document Number 86058
Rev. 2, 24-Jun-98

VR=V

RRM

, Tj=150°C I

RRM

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F

I

R
R
rr

1.3 V
500 nA
150
200 ns

m

1 (3)

A

S494D

Vishay Telefunken

Characteristics (Tj = 25_C unless otherwise specified)

100

10

Tj=175°C

1

Tj=25°C

0.1

0.01

F

I – Forward Current ( A )

0.001
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

VF – Forward Voltage ( V )15962

Figure 1. Forward Current vs. Forward Voltage

1.4

1.2

1.0

0.8

0.6

VR=V

RRM

half sinewave

R

=60K/W

thJA

l=10mm

250

VR = V

RRM

R

=

200

150

100

50

R

P – Reverse Power Dissipation ( mW )

0

25 50 75 100 125 150 175

Tj – Junction Temperature ( °C )15964

thJA

60K/W

110K/W

150K/W

Figure 3. Max. Reverse Power Dissipation vs.

Junction Temperature

1000.0

1000.0
VR = V

RRM

100.0

100.0

m

10.0

10.0

0.4
R

=110K/W

0.2

FAV

I – Average Forward Current ( A )

0

0 20 40 60 80 100 120 140 160 180

thJA

PCB: d=10mm

T

– Ambient Temperature ( °C )15963

amb

Figure 2. Average Forward Current vs.

Ambient Temperature

Dimensions in mm

Standard Glass Case
DOT 30 B
Weight max. 0.5g

Cathode Identification

1.0

1.0

R

I – Reverse Current ( A )

0.1

0.1
25 50 75 100 125 150 175

25 50 75 100 125 150 175

Tj – Junction Temperature ( °C )15965

Figure 4. Reverse Current vs. Junction Temperature

∅ 3 max.

technical drawings
according to DIN
specifications

95 10524

∅ 0.82 max.

26 min. 26 min.

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4.2 max.

Document Number 86058

Rev. 2, 24-Jun-98

S494D

Vishay Telefunken

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. V arious 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.

Document Number 86058
Rev. 2, 24-Jun-98

Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany

Telephone: [phone], Fax number: 49 (0)7131 67 2423

www.vishay.de • FaxBack [phone]

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