Data Sheet

BT151-500R_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 2 March 2009 5 of 11
NXP Semiconductors
BT151-500R
SCR, 12 A, 15mA, 500 V, SOT78
5. Thermal characteristics
Fig 5. Non-repetitive peak on-state current as a function of the number of sinusoidal current cycles; maximum
values
003aab829
80
40
120
160
I
TSM
(A)
0
number of cycles
1 10
3
10
2
10
t
p
T
j
initial = 25 °C max
I
T
I
TSM
t
Table 5. Thermal characteristics
Symbol Parameter Conditions Min Typ Max Unit
R
th(j-mb)
thermal resistance from
junction to mounting
base
see Figure 6 --1.3K/W
R
th(j-a)
thermal resistance from
junction to ambient 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 =