Fzt1149a, Thermal characteristics, Transient thermal resistance – Diodes FZT1149A User Manual

Page 4: Derating curve

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FZT1149A

100µs

Pulse Width

Transient Thermal Resistance

0

Therm

al Resistance

(°C

/W)

D=0.2

D=0.1

D=0.05

D=0.5

Single Pulse

D=t1

tP

t1

tP

1ms

10ms 100ms

1s

10s

100s

Derating curve

Max

Pow

er Dissip

ation

- (W

atts)

0

0

T - Ambient Temperature (°C)

D = 1

10

20

30

40

50

20

40

60

80

100

120

140

160

1

2

3

4

THERMAL CHARACTERISTICS

SPICE PARAMETERS

*ZETEX FZT1149A Spice model Last revision 10/1/97

*

.MODEL

FZT1149A PNP IS =9.5e-13 NF=1.002 ISE=1.2e-13 NE =1.4

+

BF =520 VAF=24.97 IKF=5 NR =0.997

+

ISC=4.5E-13 NC =1.25 BR = 40 VAR=2.51 IKR=0.7

+

RE =20e-3 RB =150e-3 RC =10e-3 CJE=490e-12

+

CJC=150e-12 VJC=1.094 MJC= 0.4739 TF =1e-9 TR = 3.5e-9

*

*

1995 ZETEX PLC

The copyright in this model and the design embodied belong to Zetex PLC (“Zetex”). It is supplied
free of charge by Zetex for the purpose of research and design and may be used or copied intact
(including this notice) for that purpose only. All other rights are reserved. The model is believed
accurate but no condition or warranty as to its merchantability or fitness for purpose is given and
no liability in respect of any use is accepted by Zetex PLC, its distributors or agents.

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