BC635_BCP54_BCX54_7

© NXP B.V. 2007. All rights reserved.

Product data sheet

Rev. 07 — 4 June 2007

8 of 15

NXP Semiconductors

BC635; BCP54; BCX54

45 V, 1 A NPN medium power transistors

FR4 PCB, standard footprint

Fig 7.

Transient thermal impedance from junction to ambient as a function of pulse duration for SOT89;

typical values

Fig 8.

Transient thermal impedance from junction to ambient as a function of pulse duration for SOT89;

typical values

006aaa815

10

1

10

(K/W)

1

duty cycle =

0.01

0

0.02

0.05

0.1

0.2

0.33

0.5

0.75

1.0

006aaa090

10

1

10

(K/W)

1

0

duty cycle =

1

0.75

0.5

0.33

0.2

0.1

0.05

0.02

0.01