Thyristors
12 Amp Alternistor (High Commutation) Triacs
Revised: GD.10/08/20
©2019 Littelfuse, Inc
Specifications are subject to change without notice.
Qxx12xHx Series
Description
This 12 Amp bidirectional 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.
Standard alternistor triac components operate with in-phase
signals in Quadrants I or III and ONLY unipolar negative gate
pulses for Quadrant II or III. The alternistor triac will not
operate in Quadrant IV. These are used in circuit applications
requiring a high dv/dt capability.
Main Features
Symbol Value Unit
I
T(RMS)
12 A
V
DRM
/V
RRM
400, 600, 800 or 1000 V
I
GT (Q1)
10 or 50 mA
Features & Benefits
• RoHS-compliant
• Glass – passivated
junctions
• Voltage capability up to
1000 V
• Surge capability up to
120 A
• The L-package has
an isolation rating of
2500V
RMS
• Solid-state switching
eliminates arcing or
contact bounce that
create voltage transients
• No contacts to wear
out from reaction of
switching events
• Restricted (or limited) RFI
generation, depending
on activation point sine
wave
• Requires only a small
gate activation pulse in
each half-cycle
• Recognized to UL 1557
as an Electrically Isolated
Semiconductor Device
Schematic Symbol Applications
Excellent for AC switching and phase control applications
such as heating, lighting, and motor speed controls.
Typical applications are AC solid-state switches, light
dimmers, power tools, lawn care equipment, home/brown
goods and white goods 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.
Agency Approval
Agency Agency File Number
E71639*
* - L Package Only
RoHS
Additional Information
Datasheet
Samples
Resources