LED Dimmer Triac/QUADRAC Thyristors

Littelfuse offers robust switching performance for AC line-based LED dimmer applications

Image of Littelfuse's LED Dimmer Triac/QUADRAC ThyristorsThe Q6008LH1LED and Q6012LH1LED series of AlternistorTriac, and the Q6008LTH1LED and Q6012LTH1LED series of QUADRAC thyristor power control devices are designed for use as the switch in a dimmer circuit to adjust the light output of light emitting diode (LED) bulbs and strings. They allow designers of AC line-based dimmers for LED lighting to accommodate a wide range of operating parameters without sacrificing reliability, and without degrading the performance of the dimmer. As a result, a single control device can be used for LED-based dimmers or for combination dimmers designed for incandescent, compact fluorescent lamp (CFL), and LED loads.

Features SMD Inductors At-A-Glance
LED Dimmer Triac/QUADRAC Thyristors
  •  Max holding current as low as 6 mA
  •  UL recognized TO-220AB package
  •  110°C rated junction temperature
  •  70 A/μs di/dt performance
  •  QUADRAC version includes integrated DIAC

  • Full control of light output at the extreme low end of load conditions
  • 2500 VAC min isolation between mounting tab and active terminals
  • Improves margin of safe operation with less heat sinking required
  • Provides enhanced immunity from electrical noise
  • Enables survivability of typical LED load-operating characteristics
  • Simplicity of circuit design and layout
  • 600 V blocking capability
LED Dimmer TriacQUADRAC Thyristors
ImageManufacturer Part NumberDescriptionTriac TypeVoltage - Off StateAvailable QuantityBuy Now
TRIAC ALTERNISTOR 600V 12A TO220Q6012LH1LEDTRIAC ALTERNISTOR 600V 12A TO220Alternistor - Snubberless600V645 - Immediate
TRIAC ALTERNISTOR 600V 8A TO220Q6008LH1LEDTRIAC ALTERNISTOR 600V 8A TO220Alternistor - Snubberless600V125 - Immediate
TRIAC INT TRIGGER 600V 8A TO220Q6008LTH1LEDTRIAC INT TRIGGER 600V 8A TO220Internally Triggered600V601 - Immediate
TRIAC INT TRIGGER 600V 12A TO220Q6012LTH1LEDTRIAC INT TRIGGER 600V 12A TO220Internally Triggered600V393 - Immediate
Published: 2013-08-29