The STMicroelectronics T2535-800G-TR is an Alternistor-Snubberless triac rated for 800 V off-state voltage and 25 A RMS on-state current. It is a single-device surface-mount triac in a D2PAK (TO-263-3) package, designed for AC power switching without the external snubber network typically needed to suppress dV/dt false triggering. The Snubberless construction means it handles commutating dV/dt at high junction temperatures, which is the main failure mode on inductive loads like motors, transformers, and solenoids.
25 A RMS and 260 A surge — sizing the load and the copper
The 25 A RMS continuous rating is the design target for the load current.
Snubberless — why you can skip the RC snubber
The Snubberless Alternistor structure is the key differentiator. A standard triac needs an RC snubber to limit dV/dt when switching inductive loads; the Snubberless design raises the critical dV/dt so high that in most applications the snubber is unnecessary.
It is ROHS3 compliant. For a BOM that needs a 25 A Snubberless triac in a surface-mount D2PAK, this part is a clean fit with no last-time-buy clock ticking.