This key fits SIMATIC S7-300 and S7-400 CPUs that accept the standard Siemens key for the mode-selector switch. It is not a functional substitute for a CPU or any electronic module — it is purely a mechanical spare. If your panel was specified around a 6ES7518-4TP00-0AB0 CPU, that unit uses a different key design; the 6ES7911-0AA00-0AA0 will not physically interchange without verifying the CPU front-panel keyway.
Siemens 6ES7911-0AA00-0AA0 SIMATIC S7 CPU Key, Spare Part
MPN6ES7911-0AA00-0AA0
Siemens SIMATIC S7 spare part, key for CPU, 2 units, 2 g.
$151.24Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Weight, approx. | 2 g |
| Belongs to product | SIMATIC S7 |
Product details
Frequently asked questions
Will 6ES7911-0AA00-0AA0 fit a panel specified around 6ES7518-4TP00-0AB0?
No — the 6ES7518-4TP00-0AB0 is a SIMATIC S7-1500 CPU with a different front-panel key design. The 6ES7911-0AA00-0AA0 key is intended for S7-300 and S7-400 CPUs and will not physically interchange without verifying the keyway compatibility.
MPN
6ES7911-0AA00-0AA0