Obsolete Mitsubishi A Series PLC Parts | A1S/A2S/A3A CPUs Sourcing

The Mitsubishi MELSEC A series (A1S, A2S, A3A, AnS, AnA and AnU families) powered Mitsubishi's rise in factory automation from the 1980s through the 2000s. Mitsubishi ended A series production long ago and even the GX Developer software now treats A series as a legacy target — yet the installed base across Asia, especially textile, packaging and machine-tool OEM lines, remains enormous.

TGK Parts sources obsolete Mitsubishi A series parts through a global surplus network. Send the model number (e.g. A2SHCPU, A1SX42) or a nameplate photo — we reply within 12 hours with availability, condition and price, bench-tested before shipping.

A series families and modules we source

Series	Discontinued models	Current replacement
A1S / A1SJ	A1SJCPU-S3, A1SJHCPU, A1SX40/42 I/O, A1SY40/42 outputs	Migrate to iQ-R / iQ-F
A2S / A2SH / A2AS	A2SHCPU, A2SHCPU-S1, A2ASCPU-S1/S30, A2USCPU	Migrate to iQ-R / L series
A3A / AnA / AnS	A3ACPUP21, A3NCA, AnNCPU, AnSCPU	Migrate to Q / iQ-R
A series I/O	A1SX42, A1SY41, A1S68AD/DA, A1SD75 position modules	Direct surplus sourcing
Motion & positioning	A1SJ71UC motion controllers, A1SD75P1, A1S64AD	Direct surplus sourcing
Networking	A1SJ71AR21, AJ71E71 Ethernet, AJ71QC24 serial	Direct surplus sourcing

Our sourcing process (quote within 12 hours)

Send the A series model or nameplate photo — note the base unit and expansion arrangement, as power budget matters on A series racks.
We query the global surplus network — Asian textile and packaging decommissioning stock is the richest source.
You receive a quote within 12 hours with condition stated clearly: tested surplus or refurbished, with photos.
Bench testing before shipping: power-up, program load or upload, I/O forcing and comms verification — 12-month warranty on every unit.

Frequently asked questions

Can you source an A2SHCPU?

Yes — A2S/A2SH CPUs are a core sourcing line. Send the exact model and base unit; we reply within 12 hours.

Are A1SX42 input modules still available?

Regularly as tested surplus from decommissioned textile and packaging lines. Send your I/O count for a quote.

Can GX Developer still program an A series CPU?

Yes, in legacy compatibility mode on older GX Developer versions. We can supply the CPU with your program pre-loaded from a GX Developer backup.

What replaces an A series rack today?

Mitsubishi's migration path is iQ-R (Q bridge) or iQ-F (FX bridge), with program conversion in GX Works. We keep the legacy rack running until your window.

Do you supply A1SJ71 motion controllers?

Yes — A1SJ71UC and related modules are in regular sourcing rotation as tested surplus.

Obsolete Mitsubishi MELSEC A Series Parts Sourcing