What it is and where it sits
The Mitsubishi FX3S-10MT/ES is a compact PLC base unit in the FX3S series, configured with 6 DC inputs and 4 transistor (sink) outputs. It is the I/O-bearing CPU in the FX3S-10MT family — the transistor sink output form is what differentiates it from the relay-output FX3S-10MR siblings in the same base frame. It is filed as a PLC main unit under PLCs & HMIs > PLCs and Accessories > Industrial Computer Board, which reflects its role as a standalone controller for small machines rather than a module on an existing backplane.
Sourcing a functional alternative within the FX3S family
Inside the FX3S-10 base frame, the relay-output variants FX3S-10MR/DS and FX3S-10MR/ES are catalogued as peer entries on the same line; the engineering difference is transistor sink versus relay contacts, which changes how inductive loads are wired and suppressed, not the footprint or I/O count. No L-series successor is recorded for this MPN, so a cross-reference cannot be asserted. Specify FX3S-10MT/ES against the BOM line and request an RFQ quote.