
Teccor Electronics
http://www.teccor.com
972-580-7777
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QUADRAC
Thyristor Product Catalog
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#E71639
QUADRAC
Internally Triggered Triacs (4 – 15 Amps)
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General Description
Teccor’s QUADRAC devices are triacs that include a diac trig-
ger mounted inside the same package. This device, developed
by Teccor, saves the user the expense and assembly time of buy-
ing a discrete diac and assembling in conjunction with a gated
triac. Also, the Alternistor QUADRAC device (QxxxxLTH) elimi-
nates the need for a snubber network.
The QUADRAC device is a bidirectional AC switch and is gate
controlled for either polarity of main terminal voltage. Its primary
purpose is for AC switching and phase control applications such
as speed controls, temperature modulation controls, and lighting
controls where noise immunity is required.
Triac current capacities range from 4 to 15 Amperes with voltage
ranges from 200-600 Volts. QUADRAC devices are available in
the TO-220AB package as shown above.
The Thermotab package is electrically isolated to 2,500 V (RMS)
from the leads to mounting surface. 4,000 V (RMS) is available
on special order. This means that no external isolation is
required, thus eliminating the need for separate insulators and
insulator-mounting steps ... saving dollars over “hot tab” devices.
All Teccor triac and diac chips have glass-passivated junctions to
ensure long term device reliability and parameter stability.
Variations of devices in this data sheet are available for custom
design applications. Please consult the factory for more informa-
tion.
Features
Glass-passivated junctions
Electrically-isolated package
Internal trigger diac
High surge capability — up to 200 Amps
High voltage capability — 200 up to 600 Volts
THERMOTAB
TO-220AB
(Isolated)
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MT2
MT1
T