Please note we are still adding products to our new website. Can't see the product you need? Contact us on 01444 243 452 /

January 2022 – Littelfuse Expands High Temperature TRIAC Thyristors Series

Published on: 06/01/2022

Ideal for IoT smart home applications such as appliances, lighting and controls, Littelfuse’s TRIAC thyristors series helps designers to improve thermal management

Engineer on a computer with green banner overlay

Littelfuse has announced an additional five series of high-temperature Alternistor TRIAC switching thyristors. The thyristors are designed for use as semiconductor switches in appliances and equipment powered by line AC voltages up to 250Vrms.

Littelfuse’s TRIAC thyristors are available in five compact, surface-mount and through-hole packages and expand the product line by making high 150°C maximum junction temperature devices available in 600V to 800V with ratings of 12A, 16A, 25A, 30A and 40A.

Littelfuse’s combination of high temperature capabilities, space-saving packaging and choice of current ratings makes the devices well-suited for IoT smart home applications that require compact design but don’t involve continuous high currents.

The high temperature Alternistor TRIACs include several key benefits including: easier thermal management, especially in applications with limited or no heat sinking, mechanically and thermally robust clip-attach packages offering higher field reliability and enables designers to use smaller board sizes in low power applications.


Typical Applications

  • Kitchen and home appliances
  • Tankless water heaters
  • Electric tools
  • Lighting dimmers


Shop the new Alternistor TRIAC Product Range:

QJ8012xHx Series 12A

QJxx16xHx Series 16A

QJxx25xHx Series 25A

QJxx30LH4 Series 30A

QJxx40xx Series 40A


GD Rectifiers has access to an extensive range of Littelfuse’s power semiconductors, circuit protection devices and solar products.


For further information on Littelfuse’s product range or to discuss your requirements, please contact GD Rectifiers on: 01444 243 452 or email:

Share Article

Related News

IXYS SMPD Packages
Semikron's Power Electronics for Motor Drives
IXYS UK Westcode Gate Turn-off thyristors
IXYS Bipolar Rectifier Thyristor Module
Arc-Flash Relays image
Power Electronics for Energy Storage Systems
Dynex’s 3.3kV 1500A IGBT Module
Semikrons SKAI 3 LV MOSFET Inverters Flyer
IXYS UK Westcode Medium Voltage Thyristors
Littelfuse 10EV High Voltage Fuses
Dynex IGBT Modules