What the line item actually is
The ABB 3ADT220120R0003 is filed on the order line as a DCS DC thyristor drive component under the ASEA BROWN BOVERI legacy branding, sitting in the PLCs & HMIs / PLCs and Accessories / PLCs (Programmable Logic Controllers) catalog path. At 0.0050 kgs on the listing, the part is a small module-scale item — not a chassis drive — which matters when a panel planner is estimating DIN-rail real estate or a shipping clerk is rating the carton against a multi-kilogram drive assembly. The DCS DC thyristor drive family is the legacy ABB/ASEA product line used in older DC motor drive cabinets; a 3ADT-prefix code points to the spare/accessory tier that supports those cabinets rather than to a modern AC drive module.
Sourcing posture for a legacy DCS line
A 3ADT220120R0003 request for an existing DCS DC drive cabinet is typically fielded through the surplus/broker and independent channel, since current ABB catalog listings favor newer AC-drive platforms. Specify the full 3ADT220120R0003 string on the RFQ.
Peer MPNs and why they are not swaps
The other catalog peers, SAFR-SC4-04G at 0.0045 kgs and 3BHE021887R0101 at 0.05 kgs, also share the PLC accessory filing but sit on different ABB/legacy product lines; a panel that was specified around SAFR-SC4-04G will not accept a 3ADT220120R0003 without confirming the host cabinet, terminal map, and fieldbus slice on the drawings.
Spec into the BOM and request the quote
For a controls integrator quoting a replacement card into an existing DCS DC drive cabinet, the 3ADT220120R0003 order code is the level of detail that needs to land on the purchase order — not a generic 'ABB DCS thyristor drive card' description, because the 3ADT prefix gates which subassembly the part is drawn against. Request the part against an RFQ with the full 3ADT220120R0003 string, the cabinet/host reference, and the slot position from the existing BOM; the sourcing channel will then confirm availability and any trace/serialization expectations for the spare before release.