Siemens runs one of the most rigorous lifecycle programs in industrial automation, which means production-critical hardware can hit phase-out and obsolete status while your plant is still depending on it. PALM Parts Solution specialises in keeping these older systems alive: we hold new, surplus and refurbished Siemens inventory, and where it makes sense, we engineer the path to a current SINAMICS or SIMATIC replacement.
Discontinued Siemens PLCs
End-of-life and obsolete SIMATIC controllers — SIMATIC S5 (95U/100U/115U/135U/155U), early S7-200 (CPU 212/214/215/216), legacy S7-300 (315/317/319), and selected S7-400 CPUs.
- • SIMATIC S5 — 6ES5 series CPUs and I/O
- • S7-200 — 6ES7212/214/216 CPUs (MicroWin)
- • S7-300 — 6ES7315-2EH14, 6ES7317-2EK14, 6ES7318
- • S7-400 — selected 6ES7412/414/416/417 CPUs and IM modules
Discontinued Siemens Drives
Obsolete and discontinued Siemens variable speed drives — MICROMASTER 4, SIMOVERT MasterDrives, SIMOREG DC Master, and early SINAMICS G110/G110D.
- • MICROMASTER 410 / 420 / 430 / 440 (6SE6400-...)
- • SIMOVERT MasterDrives VC / MC (6SE70...)
- • SIMOREG DC Master 6RA70 (selected variants)
- • SINAMICS G110 (6SL3211-0AB...)
Legacy CNC Systems
Obsolete Siemens CNC and SIMODRIVE control — SINUMERIK 810 / 840C / 840Di, SIMODRIVE 611-A / 611-D / 611-U servo systems.
- • SINUMERIK 810/840C/840Di NCU modules
- • SIMODRIVE 611 power and control modules
- • 1FT5 / 1FT6 servomotor spares
- • MMC/MCP operator panels for legacy SINUMERIK
Legacy Networking Products
Discontinued Siemens Industrial Ethernet, PROFIBUS and remote-I/O hardware — early SCALANCE X switches, OSM/ESM optical switches, IM 153 PROFIBUS interface modules, ET 200S, ET 200X.
- • SCALANCE X-100 series early variants
- • OSM/ESM optical switches
- • ET 200S (6ES7151-...) IM and electronic modules
- • ET 200X (PROFIBUS) — fully obsolete
- • IM 153-1/-2 PROFIBUS interface modules
Obsolete Siemens sourcing — what you get
24/7 emergency Siemens sourcing — SIMATIC, SINAMICS, SITOP and SINUMERIK back online fast.
Custom pricing on S7, ET 200, SINAMICS, SIRIUS, SCALANCE and obsolete Siemens parts.
Talk to engineers who know TIA Portal, Step 7, Starter and DriveES — not call-center agents.
DHL, FedEx, UPS — Siemens parts delivered door-to-door in 1-4 business days.
Tested Siemens stock: SIMATIC S7-300/400/1200/1500, SINAMICS G/S/V, MICROMASTER, SIMOREG.
We hunt down discontinued Siemens MLFB numbers globally — even decade-old SIMOVERT and SIMODRIVE.
Engineering review on whether to repair, replace, or migrate your Siemens hardware.
S7-300 → S7-1500, MICROMASTER → SINAMICS, SIMOVERT → SINAMICS migration support.
Frequently asked questions
Can you still source obsolete Siemens parts by MLFB number?
Yes — sourcing obsolete Siemens MLFB numbers is one of our specialties. Send us the MLFB, quantity and target lead time through our quote form and we will scan our global network of new, surplus and tested refurbished stock.
What is the difference between new, surplus and refurbished?
New = factory-sealed, current production. Surplus = unused, often in original Siemens packaging but from older production runs. Refurbished = professionally cleaned, repaired and tested with a warranty. We list condition transparently on every quote.
How long does sourcing an obsolete Siemens part take?
Same-day for items we hold in stock. 24–72 hours for parts available through our distribution network. Hard-to-find obsolete MLFBs may take longer — we always commit a realistic ETA.
Should I repair, replace, or migrate my obsolete Siemens hardware?
It depends on the part, the installed base and your migration roadmap. Our engineering team can review the situation and recommend repair vs replace vs full migration. See our Migration Center for current upgrade paths.
Do you warranty refurbished obsolete Siemens parts?
Yes — refurbished Siemens units ship with a standard PALM Parts Solution warranty and a test report so you know exactly what you are putting into your machine.
Ready to plan your next upgrade?
Our Siemens specialists can review your installed base and propose the best path forward — repair, surplus replacement, or full TIA Portal migration.