25 mA holding current — stays latched through zero-cross
The 25 mA max holding current means the TRIAC stays on until the load current drops below that threshold near the AC zero-cross. For a 450 mA RMS load, the device latches reliably through each half-cycle.
Active production, ROHS3 compliant, TO-92-3 package
This TRIAC is listed as Active in ST's product status and ROHS3 compliant. The through-hole TO-92-3 package (formed leads) suits hand-assembly, prototyping, and retrofit on legacy boards.
The ACS108-6SA-TR is a current-production, commercially available part sourced through independent distribution.