The L4940V85 is a single-output, fixed 8.5V positive LDO regulator from STMicroelectronics, rated for 1.5A continuous output. The 68 dB PSRR at 120 Hz tells you this part can clean up rectified line ripple — useful if you're feeding an analog front-end or a sensor bias from an unregulated wall wart. The 0.9V max dropout at 1.5A means you need at least 9.4V on the input to hold regulation; below that the output starts to sag.
STMicroelectronics lists the L4940V85 as Obsolete. That means no new production — no LTB, no future fab runs. We source per RFQ; availability and price are confirmed at quote time. The TO-220-3 package is through-hole, so rework is straightforward if you're pulling from a reel or tube.
Protection features and temp range for industrial use
On-chip protection covers over-temperature, reverse polarity, and short circuit. Quiescent current is 8 mA typical; maximum supply current is 50 mA. The fixed 8.5V output is not adjustable.