Littelfuse Qxx40xx Series User Manual
Qxx40xx series, Teccor, Brand thyristors

161
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor
®
brand Thyristors
40 Amp Alternistor (High Commutation) Triacs
Qxx40xx Series
Qxx40xx Series
Description
40 Amp bi-directional solid state switch series is designed 
for AC switching and phase control applications such as 
motor speed and temperature modulation controls, lighting 
controls, and static switching relays.
Alternistor type devices only operate in quadrants I, II, & III 
and are used in circuits requiring high dv/dt capability.
Main Features
Symbol
Value
Unit
I
T(RMS)
40
A
V
DRM
/ V
RRM
400 to 1000
V
I
GT (Q1)
50 to 100
mA
Features & Benefits
t3P)4$PNQMJBOU
t(MBTToQBTTJWBUFE
junctions
t7PMUBHFDBQBCJMJUZVQUP
1000V
t4VSHFDBQBCJMJUZVQUP
400A
t&MFDUSJDBMMZJTPMBUFE
K & J -Packages are UL 
recognized for 2500Vrms
Applications
Excellent for AC switching and phase control applications 
such as heating, lighting, and motor speed controls.
Typical applications are AC solid-state switches, industrial 
power tools, exercise equipment, white goods and 
commercial appliances.
Alternistor Triacs (no snubber required) are used in 
applications with extremely inductive loads requiring 
highest commutation performance.
Internally constructed isolated packages are offered for 
ease of heat sinking with highest isolation voltage.
Schematic Symbol
Agency Approval
Agency
Agency File Number
®
K & J Packages: E71639
MT1
G
MT2
