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Bulletin PD-20686 rev. A 01/06

SCHOTTKY RECTIFIER

8TQ...G

8 Amp

IF(AV) = 8 Amp

VR = 80 - 100V

Major Ratings and Characteristics

Characteristics

Value Units

IF(AV) Rectangular

waveform

VRRM range

IFSM @ tp = 5 µs sine

VF @8 Apk, TJ = 125°C

TJ range

8

80 - 100

850

0.58

- 55 to 175

A

V

A

V

°C

Description/ Features

The 8TQ...G Schottky rectifier series has been optimized for

low reverse leakage at high temperature. The proprietary

barrier technology allows for reliable operation up to 175° C

junction temperature. Typical applications are in switching

power supplies, converters, free-wheeling diodes, and re-

verse battery protection.

175° C TJ operation

High purity, high temperature epoxy encapsulation for

enhanced mechanical strength and moisture resistance

Low forward voltage drop

High frequency operation

Guard ring for enhanced ruggedness and long term

reliability

Case Styles

8TQ...G

Base

Cathode

www.irf.com

TO-220AC

1

Cathode

3

Anode

1

8TQ...G Series

Final PD-20686 rev. A 01/06

180

175

170 DC

165

160

Square wave (D = 0.50)

155 80%Rated V R applied

150

145

see note (2)

140

0 2 4 6 8 10 12

Average Forward Current - I F(AV) (A)

Fig. 5 - Maximum Allowable Case Temperature

Vs. Average Forward Current

1000

7

D = 0.20

6 D = 0.25

D = 0.33

5

D = 0.50

D = 0.75

4

RMSLimit

3

DC

2

1

0

0 2 4 6 8 10 12

Average Forward Current - IF(AV) (A)

Fig. 6 - Forward Power Loss Characteristics

DUT

CURRENT

MONITOR

At Any Rated Load Condition

And With Rated VRRM Applied

Following Surge

100

10

100

1000

10000

Square Wave Pulse Duration - t p (microsec)

Fig. 7 - Maximum Non-Repetitive Surge Current

L

IRFP460

Rg = 25 ohm

HIGH-SPEED

SWITCH

FREE-WHEEL

DIODE

40HFL40S02

+ Vd = 25 Volt

Fig. 8 - Unclamped Inductive Test Circuit

(2) Formula used: TC = TJ - (Pd + PdREV) x RthJC ;

Pd = Forward Power Loss = IF(AV) x VFM @ (IF(AV) / D) (see Fig. 6);

PdREV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1= 80% rated VR

4

www.irf.com

8TQ...G Series

Final PD-20686 rev. A 01/06

Data and specifications subject to change without notice.

This product has been designed and quaified for Industrial Level.

Qualification Standards can be found on IR's Web site.

IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105

TAC Fax: (310) 252-7309

Visit us at www.irf.com for sales contact information. 01/06

www.irf.com

7