Datasheet

BT151_SER_L_R_4 © NXP B.V. 2006. All rights reserved.
Product data sheet Rev. 04 — 23 October 2006 5 of 12
NXP Semiconductors
BT151 series L and R
Thyristors
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
see Figure 6 - - 1.3 K/W
R
th(j-a)
thermal resistance from junction to
ambient
in free air - 60 - K/W
Fig 6. Transient thermal impedance from junction to mounting base as a function of pulse width
001aaa962
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
t
p
T
P
t
T
δ =