WeEn Semiconductors
ACTT8B-800C0
AC Thyristor Triac power switch
ACTT8B-800C0 All information provided in this document is subject to legal disclaimers.
©
WeEn Semiconductors Co., Ltd. 2018. All rights reserved
Product data sheet 15 June 2018 6 / 13
9. Thermal characteristics
Table 6. Thermal characteristics
Symbol Parameter Conditions Min Typ Max Unit
full cycle; Fig. 7 - - 2 K/WR
th(j-mb)
thermal resistance
from junction to
mounting base
half cycle; Fig. 7 - - 2.4 K/W
R
th(j-a)
thermal resistance
from junction to
ambient free air
in free air; printed circuit board (FR4)
mounted
- 55 - K/W
003aal149
t
p
(s)
10
-5
1 1010
-1
10
-2
10
-4
10
-3
1
10
-1
10
Z
th(j-mb)
(K/W)
10
-2
t
p
P
t
(1)
(2)
(1) Unidirectional (half cycle)
(2) Bidirectional (full cycle)
Fig. 7. Transient thermal impedance from junction to mounting base as a function of pulse width