What it is and what the key specs mean
The Fuji Electric PXF5ACY2-FBTA1 is a self-tuning 1/8 DIN (48 x 96 mm) compact temperature and process controller with a 50 ms sampling speed. The self-tuning feature (auto-tune) runs a cycle to characterize the process gain, dead time, and time constant, then sets PID parameters. It gets you in the ballpark on startup, but for critical loops you still verify the step response and may need to tweak the rate and reset manually.
Where it fits in the panel
The 1/8 DIN cutout (48 x 96 mm) is a standard panel-mount footprint — same as many Fuji PXF predecessors and common Yokogawa/Honeywell controllers. If you're swapping an older 1/8 DIN controller, check the panel depth clearance; the PXF series is compact but still needs room behind the bezel for the terminal block and wiring.
Sourcing and lifecycle reality
For a BOM freeze or a line-down replacement, this part is a straightforward quote-to-order item. Confirm the exact input/output configuration (thermocouple type, analog output range) against your existing unit's nameplate before committing the order — the PXF5ACY2-FBTA1 order code encodes the hardware variant, and a mismatch in sensor input or output signal means a different order code.