DYNEX DSF8035SK35 Datasheet

DSF8035SK

DSF8035SK

Fast Recovery Diode

Replaces March 1998 version, DS4412-1.3 DS4412-2.0 January 2000

APPLICATIONS

■ Snubber Diode For GTO Applications

FEATURES

■ Double side cooling

■ High surge capability

■ Low recovery charge

VOLTAGE RATINGS

Type Number Repetitive Peak

Reverse Voltage

V

RRM

V

DSF8035SK35

3500

V

Conditions

= V

RSM

RRM

+ 100V

KEY PARAMETERS

V
I

F(AV)

I

FSM

Q
t

rr

RRM

r

3500V

335A

3500A
400µC

4.0µs

Lower voltage grades available.

See Package Details for further information.

CURRENT RATINGS

Symbol Parameter Conditions

Double Side Cooled

I

F(AV)

I

F(RMS)

I

F

Mean forward current

RMS value

Continuous (direct) forward current

Single Side Cooled (Anode side)

I

F(AV)

I

F(RMS)

I

F

Mean forward current

RMS value

Continuous (direct) forward current

Half wave resistive load, T

= 65oC 529 A

T

case

T

= 65oC 490 A

case

Half wave resistive load, T

T

= 65oC 355 A

case

T

= 65oC 317 A

case

Outline type code: K.

= 65oC 335 A

case

= 65oC 226 A

case

UnitsMax.

1/8

DSF8035SK

SURGE RATINGS

ParameterSymbol

FSM

FSM

Surge (non-repetitive) forward currentI

Surge (non-repetitive) forward currentI

THERMAL AND MECHANICAL DATA

Symbol

R

th(j-c)

R

th(c-h)

Thermal resistance - junction to case

Thermal resistance - case to heatsink

Parameter

Conditions

10ms half sine; with 0% V

10ms half sine; with 50% V

Conditions Max. Units

Double side cooled

Single side cooled

Clamping force 8.0kN
with mounting compound

= 150oC

RRM, Tj

= 150oC

RRM, Tj

Min.

dc

- 0.048

Cathode dc - 0.103
Double side

Single side

-

- 0.02oC/W

Max. Units

3.0 kA

3

45 x 10

2.4 kA

28.8 x 10

3

0.01

A2sI2t for fusingI2t

A2sI2t for fusingI2t

o

C/W

o

C/W- 0.090Anode dc

o

C/W

o

C/W

T

T

stg

Virtual junction temperature

vj

Storage temperature range

Forward (conducting) - 150

-55 175

9.07.0Clamping force-

CHARACTERISTICS

Symbol Typ. Units

V

FM

I

RRM

t

rr

Q

RA1

I

RM

K

V

TO

Forward voltage

Peak reverse current
Reverse recovery time

Recovered charge (50% chord)
Reverse recovery current

Soft factor

Threshold voltage

Parameter

Conditions Max.

At 400A peak, T
At V

, T

RRM

case

= 25oC - 3.5 V

case

= 150oC-mA

50

- 4.0

IF = 1000A, diRR/dt = 100A/µs
T

= 150oC, VR = 100V

case

- 400 µC

- 220 A

1.4 - -

At Tvj = 150oC - 1.8 V

o

o

kN

µs

C
C

2/8

r

T

V

FRM

Slope resistance

At Tvj = 150oC - 3.7 mΩ

Forward recovery voltage di/dt = 1000A/µs, Tj = 125oC - 140 V

DSF8035SK

DEFINITION OF K FACTOR AND Q

Q

= 0.5x IRR(t1 + t2)

RA1

dIR/dt

0.5x I

t

1

RR

I

RR

k = t

t

2

1/t2

CURVES

1600

1400

- (A)

1200

F

1000

Measured under
pulse conditions

RA1

τ

Tj = 150˚C

800

600

400

Instantaneous forward current I

200

0

0 2.0 4.0 6.0 8.0

Instantaneous forward voltage V

F

Fig.1 Maximum (limit) forward characteristics

Min. Limit
Max. Limit

- (V)

3/8