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Document Number: 91296

6

S-Pending-Rev. A, 22-Jul-08

IRFZ48RS, IRFZ48RL, SiHFZ48RS, SiHFZ48RL

Vishay Siliconix

Fig. 11 - Maximum Effective Transient Thermal Impedance, Junction-to-Case

Fig. 12a - Unclamped Inductive Test Circuit

Fig. 12b - Unclamped Inductive Waveforms

Fig. 12c - Maximum Avalanche Energy vs. Drain Current

0.01

0.1

1

0.00001

0.0001

0.001

0.01

0.1

1

10

Notes:

1. Duty factor D = t / t

2. Peak T = P

x Z

+ T

1

2

J

DM

thJC

C

P

t

t

DM

1

2

t , Rectangular Pulse Duration (sec)

1

0.01

0.02

0.05

0.10

0.20

D = 0.50

SINGLE PULSE

(THERMAL RESPONSE)

A

R

G

0.01

Ω

D.U.T.

L

+

Driver

15 V

20 V

25

50

75

100

125

150

175

0

50

100

150

200

250

Starting T , Junction Temperature ( C)

J

°

ID

TOP

BOTTOM

29A

51A

72A