
2002 Teccor Electronics
Thyristor Product Catalog
E4 - 1
http://www.teccor.com
+1 972-580-7777
SeecedPackages
Fle#E71639
Alternistor Triacs
(6 A to 40 A)
E4
General Description
Teccor offers bidirectional alternistors with current ratings from 
6 A to 40 A and voltages from 200 V to 1000 V as part of Teccor's 
broad line of thyristors. Teccor's alternistor is specifically 
designed for applications that switch highly inductive loads. 
A special chip offers the same performance as two thyristors 
(SCRs) wired inverse parallel (back-to-back), providing better 
turn-off behavior than a standard triac. An alternistor may be trig-
gered from a blocking to conduction state for either polarity of 
applied AC voltage with operating modes in Quadrants I, II, 
and III.
This new chip construction provides two electrically separate 
SCR structures, providing enhanced dv/dt characteristics while 
retaining the advantages of a single-chip device.
All alternistors have glass-passivated junctions to ensure long-
term reliability and parameter stability. Teccor's glass-passivated 
junctions offer a reliable barrier against junction contamination.
Teccor's TO-218X package is designed for heavy, steady power-
handling capability. It features large eyelet terminals for ease of 
soldering heavy gauge hook-up wire. All the isolated packages 
have a standard isolation voltage rating of 2500 V rms
.
Variations of devices covered in this data sheet are available for 
custom design applications. Consult the factory for further 
information.
Features
High surge current capability
Glass-passivated junctions
2500 V ac isolation for L, J, and K Packages
High commutating dv/dt
High static dv/dt
*
TO-220
*
TO-218
*
TO-218X
MT2
MT1
G
E4
TO-263
D
2
Pak
TO-252
D-Pak
TO-251
V-Pak