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Teccor ? brand Thyristors
Standard Bidirectional DIAC Trigger
Figure 6: Circuit Used to Measure DIAC
Characteristics (Refer to Figure 4)
Figure 7: Peak Output Current vs. Triggering
Capacitance (Per Figure 5 with R L of 20 Ω )
47 k
*
300
100 k
D.U.T.
2 5 0
200
ica
vic
120 V rms
V C
C T
0.1 μF
I L
R L
20
1%
1 5 0
100
Typ
l(
3 5
V
De
e)
60 Hz
5 0
0
.01
.02
.03
.04
.0 5
.06
.07
.08
.09
.10
* Adjust for one ?ring in each half cycle. D.U.T. = Diac
Soldering Parameters
Triggering Capacitance (C T ) – μF
Re?ow Condition
- Temperature Min (T s(min) )
Pb – Free assembly
150°C
T P
t P
Pre Heat
- Temperature Max (T s(max) )
200°C
Ramp-up
- Temperature (T L ) (Liquidus)
-Time (min to max) (t s )
Average ramp up rate (Liquidus Temp
(T L ) to peak
T S(max) to T L - Ramp-up Rate
Re?ow
- Time (min to max) (t s )
Peak Temperature (T P )
60 – 190 secs
5°C/second max
5°C/second max
217°C
60 – 150 seconds
260 °C
T L
T S(max)
T S(min)
25
Preheat
t S
time to peak temperature
t L
Ramp-down
Time
Time within 5°C of actual peak
Temperature (t p )
Ramp-down Rate
Time 25°C to peak Temperature (T P )
Do not exceed
20 – 40 seconds
5°C/second max
8 minutes Max.
280°C
HTxxx & HTMxxx & STxxx Series
340
Revised: July 9, 2008
?2008 Littelfuse, Inc.
Speci?cations are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
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