Triacs in TO-3PF package

Increase AC switch safety with SNUBBERLESS™ Triacs in TO-3PF package

New Triacs in TO-3PF package improve creepage distance and noise immunity in high-condensation applications

The new family of SNUBBERLESS Triacs in TO-3PF package offer enhanced creepage distance and noise immunity. Optimized for on/off functions or phase-angle control, they enable applications dealing with high level of condensation, such as instant tap or shower water heaters, to comply with insulation coordination standards at Pollution degree 4. With an insulated tab rated at 2.5kV, they meet UL-1557 requirements. Offering high noise immunity, TO-3PF SNUBBERLESS Triacs simplify EMI standards qualification.

Key features of SNUBBERLESS Triacs in TO-3PF package

  • Fully encapsulated TO-3PF Package:
    • High 4.4 mm creepage distance
    • Voltage Insulation 2.5 kV
  • IT(RMS) from 26A to 40A
  • IGT 50mA
  • VDRM, VRRM 600V
  • dV/dt 1kV/µs

Application examples

instant water heater Instant water heaters
Tank water heaters Tank water heaters
Outdoor gate opener Outdoor gate openers
motor control Industrial motor control

Recommended resources

pdf snubberless triacs in to 3pf packages

Snubberless Triacs in TO-3PF packages for dusty and humid environments

Discover how you can design industrial AC switches for the harshest environments. Includes list of developer tools and design resources.

Is a positive power supply mandatory for my application, or could a negative output work also?

This application note looks at the differences between positive and negative power supplies and helps developers determine which solution is best for their design.

pdf positive power supply mandatory
pdf controlling a triac with a phototriac

Guidelines and design tips for using a phototriac to control a Triac

This application note explains the basics of AC switching and using phototriacs combined with Triacs. In addition to addressing the constraints associated with resistive or inductive loads, it also provides recommendations on how to overcome common pitfalls when using a phototriac to control a Triac.

How to evaluate and improve Triacs immunity to EFT bursts

This application note discusses EFT immunity, why it is important, and how to enhance EFT robustness in your designs.

pdf triacs immunity to eft bursts