Firmware for a Realtek RTS5452 Type-C controller, marked U12 and WIN4, with a CRC32 of 0x57CFED61, packed as RAR. U12 most likely names the chip's reference designator, which matters because a device can carry more than one PD controller, each with its own image. No brand or board number is stated. Use it to reflash the corresponding SPI flash when a USB-C port stops charging or connecting. Make sure you program the right position, save the existing contents first and compare the checksum after writing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosdumpcomputer. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →