Alternistor Triacs
Data Sheets
(10) See Figure E4.12 for t
gt
versus I
GT
.
(11) See package outlines for lead form configurations. When ordering
special lead forming, add type number as suffix to part number.
(12) Initial on-state current = 400 mA dc for 16 A to 40 A devices and
100 mA for 6 A to 12 A devices.
(13) See Figure E4.1 through Figure E4.4 for maximum allowable case
temperature at maximum rated current.
(14) Pulse width
≤10
µs;
I
GT
≤
I
GTM
(15) For 6 A to 12 A devices, R
L
= 60
Ω;
16 A and above, R
L
= 30
Ω
(16) 40 A pin terminal leads on K package can run 100 °C to 125 °C.
(17) Alternistor does not turn on in Quadrant IV.
(18) T
C
= T
J
for test conditions in off state
(19) I
GT
= 200 mA for 6 A to 12 A devices and 500 mA for 16 A to 40 A
devices with gate pulse having rise time of
≤0.1
µs.
(20) Minimum non-trigger V
GT
at 125 °C is 0.2 V.
(
-
)
ALL POLARITIES ARE REFERENCED TO MT1
MT2 POSITIVE
(Positive Half Cycle)
MT2
(
-
)
+
MT2
I
GT
GATE
MT1
(+)
I
GT
GATE
MT1
I
GT
-
I
GT
GATE
REF
MT2
QII QI
QIII QIV
(+)
REF
+
MT2
I
GT
GATE
MT1
I
GT
MT1
REF
Gate Characteristics
Teccor triacs may be turned on in the following ways:
•
•
In-phase signals (with standard AC line) using Quadrants I
and III
Application of unipolar pulses (gate always negative), using
Quadrants II and III with negative gate pulses
Definition of Quadrants
REF
MT2 NEGATIVE
(Negative Half Cycle)
NOTE: Alternistors will not operate in QIV
-
Electrical Isolation
Teccor’s isolated alternistor packages withstand a minimum high
potential test of 2500 V ac rms from leads to mounting tab, over
the operating temperature range of the device. The following iso-
lation table shows standard and optional isolation ratings.
Electrical Isolation
In all cases, if maximum surge capability is required, gate pulses
should be a minimum of one magnitude above minimum I
GT
rat-
ing with a steep rising waveform (≤1 µs rise time).
If QIV and QI operation is required (gate always positive), see
Figure AN1002.8, “Amplified Gate” Thyristor Circuit.
from Leads to Mounting Tab *
V AC RMS
2500
4000
TO-218
Isolated
Standard
N/A
TO-220
Isolated
Standard
Optional **
TO-218X
Isolated
Standard
N/A
* UL Recognized File E71639
** For 4000 V isolation, use V suffix in part number.
Thermal Resistance (Steady State)
R
θ
JC
[R
θ
JA
] (TYP.)
°C/W
Package Code
K
J
L
R
D
V
N
Type
TO-218
Isolated *
6A
8A
10 A
12 A
16 A
25 A
30 A
35 A
40 A
TO-218X
Isolated *
1.35
1.32
TO-220
Isolated **
3.3 [50]
2.8
2.6
2.3
2.1
2.0
2.3
TO-220
Non-Isolated
1.80 [45]
1.50
1.30
1.20
1.10
0.87
0.85
TO-252
D-Pak
2.1
1.8
TO-251
V-Pak
2.3 [64]
2.1
TO-263
D
2
Pak
1.80
1.50
1.30
1.20
1.10
0.87
0.97
0.95
* UL Recognized Product per UL File E71639
** For 4000 V isolation, use V suffix in part number.
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E4 - 6
©2004 Littelfuse, Inc.
Thyristor Product Catalog
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