Datasheet

9397 750 13437 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet Rev. 03 — 23 September 2004 5 of 12
Philips Semiconductors
BT139 series E
Triacs; sensitive gate
5. Thermal characteristics
Table 4: Thermal characteristics
Symbol Parameter Conditions Min Typ Max Unit
R
th(j-mb)
thermal resistance from junction to
mounting base
full cycle; Figure 6 - - 1.2 K/W
half cycle;
Figure 6 - - 1.7 K/W
R
th(j-a)
thermal resistance from junction to
ambient
in free air - 60 - K/W
(1) Unidirectional.
(2) Bidirectional.
Fig 6. Transient thermal impedance as a function of pulse width.
001aab098
10
−1
10
−2
1
10
Z
th(j-mb)
(K/W)
10
−3
t
p
(s)
10
−5
11010
−1
10
−2
10
−4
10
−3
t
p
P
D
t
(2)
(1)