The Mitsubishi FX3U-80MT/ES is a compact PLC CPU with 80 I/O points, transistor sink/source outputs, and a 100-240 V AC power supply. It's the workhorse of the FX3U line for medium-density machine control.
Sibling comparison
If you're cross-shopping the FX5U-80MT/ESS, note the backplane difference: the FX5U uses the newer iQ-F architecture with a different backplane and requires GX Works3, while the FX3U runs on the established FX bus and GX Developer. Both are 80-point transistor CPUs, but they are not drop-in interchangeable.
This CPU carries a mature lifecycle stage, indicating a stable, well-established product. No recent PCN or EOL notice is flagged.