Introduction
Siemens SIMATIC PLCs power thousands of production lines worldwide. But when a critical S5, S7-200, or early S7-300 component fails, finding a genuine replacement can be a serious challenge — many of these parts have been officially discontinued by Siemens.
This guide helps industrial buyers understand which SIMATIC components are most commonly discontinued, why sourcing them is difficult, and how to find reliable replacements without compromising your production uptime.
Commonly Discontinued SIMATIC Components
The following product lines have reached or are approaching end-of-life status:
- SIMATIC S5 series — Fully discontinued. CPUs, I/O modules, and power supplies are no longer manufactured.
- SIMATIC S7-200 — Discontinued in 2017. Spare parts are increasingly scarce.
- Early S7-300 modules — Some older CPU and communication modules have been phased out.
- SIMATIC HMI OP/TP series — Older operator panels discontinued in favor of Comfort panels.
Why Sourcing Discontinued SIMATIC Parts Is Difficult
Once Siemens discontinues a product, authorized distributors stop stocking it. Lead times from secondary market suppliers can stretch to weeks or months. Counterfeit components are a real risk — especially for high-demand S7-300 CPUs.
Industrial buyers need a sourcing partner who can verify authenticity, provide condition reports, and offer warranty coverage even on legacy hardware.
How NORTHLINK Sources Discontinued SIMATIC Parts
NORTHLINK specializes in hard-to-find industrial automation components. Our global sourcing network covers:
- Verified surplus inventory from decommissioned facilities
- Factory-refurbished units with full functional testing
- Cross-reference support to identify compatible replacement modules
Every part ships with a condition report and is backed by our standard warranty.
Get a Quote for Your SIMATIC Parts
If you need a discontinued Siemens SIMATIC component, submit a request through our Request a Quote page. Our team typically responds within 24 hours with availability and pricing.