Nexperia

BC856W-Q; BC857W-Q; BC858W-Q

65 V, 100 mA PNP general-purpose transistors

9. Thermal characteristics

Table 7. 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; 35 µm copper; tin-plated and standard footprint.

aaa-028969

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 =

0.75

0.5

0.33

0.2

0.1

0.05

0.02

0.01

0

1

FR4 PCB, single-sided, 35 μm copper, tin-plated and standard footprint

Fig. 1. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

BC856W-Q_BC857W-Q_BC858W-Q

All information provided in this document is subject to legal disclaimers.

©

Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 1 — 24 June 2021

4 / 13