PDTC143X_SER

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Product data sheet

Rev. 11 — 9 December 2011

6 of 17

NXP Semiconductors

PDTC143X series

NPN resistor-equipped transistors; R1 = 4.7 k

, R2 = 10 k

FR4 PCB, standard footprint

Fig 4.

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

PDTC143XT (SOT23); typical values

FR4 PCB, standard footprint

Fig 5.

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

PDTC143XU (SOT323); typical values

006aac779

10-5

10

10-2

10-4

102

10-1

tp (s)

10-3

103

1

102

10

103

Zth(j-a)

(K/W)

1

duty cycle = 1

0.75

0.5

0.33

0.2

0.1

0.05

0.02

0.01

0

006aac780

10-5

10

10-2

10-4

102

10-1

tp (s)

10-3

103

1

102

10

103

Zth(j-a)

(K/W)

1

duty cycle = 1

0.75

0.5

0.33

0.2

0.1

0.05

0.02

0.01

0