The best replacement for triac is scr.

The best alternatives to triac are rated as following:
★★★★★  scr
★★★★  relay
★★  thyristor
★  ssr
★  mosfet
  igbt
  diac
  solid state relay

Your alternative for triac is not listed? Suggest!
Speaking about triac, one probably shouldn't forget about diac.

Other search terms related to triac and their ratings are:
★★★★★ diac
★★★★ optocoupler
★★★ inductive load
★★★ zero crossing
★ ldr circuits
snubber circuit
555
phase control
schematic diagram
You have in mind a companion for triac and it is not yet here? Propose!



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triac
scr
relay