DYNEX MF34-800, MF34-1000, MF34-1200, MF34-1400, MF34-1600 Datasheet

MF34

MF34

Fast Recovery Diode

Replaces March 1998 version, DS4624-2.1 DS4624-3.0 January 2000

APPLICATIONS

■ Inverse, Parallel Or Series Connected Diode

■ Power Supplies

■ High Frequency Applications

FEATURES

■ Glass Passivation

■ High Voltage Capability

■ Fast Recovery Characteristics

VOLTAGE RATINGS

Type Number Repetitive Peak

Reverse Voltage

V

RRM

V

MF34 - 1600
MF34 -1400
MF34 - 1200
MF34 -1000
MF34 - 800

1600
1400
1200
1000

800

Conditions

= V

V

RSM

RRM

+100V

KEY PARAMETERS

V

RRM

I

F(AV)

I

FSM

Q

r

t

rr

1600V

40A

400A
25µC

0.25ns

Lower voltage grades available.
For stud anode add suffix 'R' to type number. e.g. MF34-1600R.

See Package Details for further information.

Outline type code: DO5.

CURRENT RATINGS

Symbol Parameter Conditions UnitsMax.

I

F(AV)

I

F(RMS)

I

Mean forward current

RMS value

F

Continuous (direct) forward current

Half sine wave resistive load, T

T

= 65oC63A

case

T

= 65oC50A

case

= 65oC40A

case

1/7

MF34

SURGE RATINGS

ParameterSymbol

FSM

Surge (non-repetitive) forward currentI

THERMAL AND MECHANICAL DATA

Symbol

th(j-c)

th(c-h)

T

vj

stg

Thermal resistance - junction to caseR
Thermal resistance - case to heatsinkR

Virtual junction temperature

Parameter

Conditions

10ms half sine; with V

RRM

10ms half sine; Tj = 125oC

Conditions Max. Units

dc

≤ 10V, Tj = 125oC

Max. Units

400 A

800 A

Min.

- 0.8

Mounting torque 3.5Nm
with mounting compound

Forward (conducting) - 125
Reverse (blocking)

- 125

125-55Storage temperature rangeT

4.03.5Mounting torque-

o

C/W

o

C/W- 0.2

o

o

˚C

Nm

2

sI2t for fusingI2t

C
C

CHARACTERISTICS

Symbol Typ. Units

V

FM

I

RM

t

rr

Q

V

TO

r

T

Forward voltage

Peak reverse current

Reverse recovery time

Recovered charge

R

Threshold voltage

Slope resistance At Tvj = 125oC - 7.0 mΩ

Parameter

Conditions Max.

At 120A peak, T
At V

, T

RRM

case

= 1A, di

I

F

VR = 100V

= 50A, di

I

F

VR = 100V

RR/

RR/

= 25oC - 2.0 V

case

= 100oC-mA

dt = 25A/µs, T

dt = 50A/µs, T

= 25˚C,

case

case

= 25˚C,

- 250

-25µC

5

At Tvj = 125oC - 1.2 V

ns

2/7

CURVES

200

Measured under pulse

conditions

MF34

400

350

150

Tj = 25˚C

Tj = 125˚C

100

50

Instantaneous forward current - (A)

0

0 1.0 2.0 3.0

Instantaneous forward voltage - (V)

Fig.1 Maximum (limit) forward characteristics

T

case

V

R

= 125˚C

= V

RRM

1.00

0.75

d.c.

300

250

0.50

0.25

Thermal impedance - ˚C/W

200

Peak half sinewave forward current - (A)

1235410 50

Cycles at 50Hz

0

0.001 0.01 0.1 1.0 10
Time - (s)

Duration

Fig.2 Surge (non-repetitive) forward current vs time Fig.3 Maximum transient thermal impedance

3/7