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PMST4403

40 V, 600 mA PNP switching transistor

PMST4403

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Product data sheet

1 August 2016

3 / 13

Tamb (°C)

-75

175

125

25

75

-25

aaa-018431

100

200

300

Ptot

(mW)

0

(1)

(1) FR4 PCB; standard footprint

Fig. 1. Power derating curve

9. Thermal characteristics

Table 6. Thermal characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Rth(j-a)

thermal resistance

from junction to

ambient

in free air

[1]

-

-

625

K/W

[1] Device mounted on an FR4 PCB, single-sided copper, tin-plated and standard footprint.

aaa-018433

10-5

10

10-2

10-4

102

10-1

tp (s)

10-3

103

1

102

10

103

Zth

(K/W)

1

duty cycle = 1

0

0.01

0.02

0.05

0.1

0.2

0.33

0.75

0.5

Mounted on FR4 PCB; standard footprint

Fig. 2. Transient thermal impedance as a function of pulse time; typical values