The BA7812CP-E2: 63 dB of power-supply rejection at 120 Hz attenuates full-wave-rectified ripple by a factor of roughly 1400 — the output sees under 10 mV of ripple from a 1 Vpp input, which keeps noise off analog supply rails. The 8 mA quiescent current is typical for a 1 A-class linear regulator; the 800 µA maximum supply current covers the control circuitry and does not add significantly to the thermal budget.
ROHS3 compliance — EU regulatory acceptance
ROHS3 compliant, with no exemptions for phthalates or lead in solder — the part ships in tape-and-reel or cut-tape format for through-hole assembly.