Siemens is discontinuing SINAMICS G120 Control Units CU250S-2 as new parts from 01 October 2026

• The Siemens SINAMICS G120 CU250S-2 CAN, with item number 6SL3246-0BA22-1CA0, is affected.

   

• P.M400 has been in effect since 1 October 2025. Siemens has thus officially announced the product's end-of-life.

   

• P.M410 is scheduled to come into effect from 1 October 2026. From that date, Siemens will only supply the assembly as a spare part.

   

• A direct Siemens successor with CAN communication is not available. Siemens recommends switching to PROFINET or another protocol.

   

• EICHLER provides support with repairs, testing and the supply of spare parts. This ensures that system availability remains predictable despite obsolescence.

The Siemens SINAMICS G120 CU250S-2 CAN is affected. The manufacturer's part number is 6SL3246-0BA22-1CA0.

The Siemens SINAMICS G120 CU250S-2 CAN controles drives within Siemens SINAMICS G120 system. The control unit handles control, communication and monitoring. It integrates the drive into machines and systems via CANopen. Siemens has designed this assembly as “announced for end-of-life” with effect from 1 October 2025.

Siemens plans to discontinue the product on 1 October 2026. From this date, Siemens will only supply the Siemens SINAMICS G120 CU250S-2 CAN as a spare part. New parts will then no longer be available as standard. The product will be officially discontinued by 1 October 2035 at the latest.

Siemens cites a portfolio adjustment as the reason for the change. The Siemens SINAMICS G120 CU250S-2 CAN is therefore gradually being phased out of active marketing. P.M400 has been in effect since 1 October 2025. This milestone the start of the ten-year spare parts commitment.

The next step will have a greater impact on maintenance and procurement. On 1 October 2026, the Siemens SINAMICS G120 CU250S-2 CAN will reach P.M410 status. The spare parts phase will then begin. After that, the manufacturer, Siemens, will only supply the assembly as a spare part.

Legend:

• P.M300: The Siemens product is currently in regular production.
• P.M400: Siemens announces the product's end-of-life. Spare parts commitment begins.
• P.M410: Siemens discontinues the product as a new part. The spare parts phase begins.
• P.M490: Siemens ceases the supply of spare parts and support.
• P.M500: Siemens completely freezes the product lifecycle.

The discontinuation of the 6SL3246-0BA22-1CA0 product increases the risk of unplanned breakdowns. Systems with CANopen communication therefore require a clear strategy. An immediate retrofit is often not cost-effective. A reliable repair and spare parts strategy can significantly stabilise the remaining service life.

Für den Einkauf verändert sich die Preis- und Verfügbarkeitssituation. Neuteile verlieren nach P.M410 ihre reguläre Bezugsbasis. Ersatzteile können teurer werden. Reparaturen von aktiv eingesetzten Baugruppen gewinnen dadurch an wirtschaftlicher Bedeutung.

For procurement, the price and availability situation is changing. According to P.M410, new parts will no longer be available through regular supply channels. Spare parts may become more expensive. As a result, repairs to actively used assemblies are becoming increasingly important from an economic perspective.

Siemens nennt keinen direkten Nachfolger mit CAN-Kommunikation. Siemens empfiehlt ein Upgrade des Systemprotokolls. Mögliche Alternativen sind Siemens SINAMICS G120 CU250S-2 USS/Modbus TCP, Siemens SINAMICS G120 CU250S-2 PN und Siemens SINAMICS G120 CU250S-2 DP. 

Siemens does not specify a direct successor with CAN communication. Siemens recommends upgrading the system protocol. Possible alternatives are the Siemens SINAMICS G120 CU250S-2 USS/Modbus TCP, the Siemens SINAMICS G120 CU250S-2 PN and the Siemens SINAMICS G120 CU250S-2 DP. 

However, a migration requires planning. The control programme, fieldbus structure, parameterisation and documentation must all be compatible. Any changeover ties up time, budget and technical resources. Many systems therefore require an interim solution until the planned modernisation takes place.

EICHLER supports operators with end-of-life Siemens automation technology. The focus is on repair, maintenance and the supply of spare parts, as well as a comprehensive range of services covering the life cycle and obsolescence management. This safeguards system availability and avoids unnecessary immediate investment.

EICHLER inspects Siemens components independently of the manufacturer. Repairs extend the service life of existing technology. Stockpilling reduces procurement risks. Structured obsolescence planning provides security right up to the planned decommissioning.

For maintenance staff, rapid availability is key. For technicians, technical reliability is key. For purchasers, cost-effectiveness is key. EICHLER combines these objectives with practical experience in automation technology.