When a Siemens KTP700 HMI needs attention, you are choosing between two different kinds of fixes. One product is a membrane keypad and touchpad repair kit. The other is a complete SIMATIC HMI touch screen. Both use the 6AV2123-2GB03-0AX0 part number, but they solve different parts of the same problem. In the PLCs and HMIs space, the decision comes down to whether your existing panel is worth repairing or whether it should be replaced as a unit. The repair kit is the lower-cost front-panel route. The full touch screen is the finished, complete unit. That distinction should shape every other thing you compare.
Quick verdict
Choose the repair kit when the KTP700's display and internal hardware are healthy and the issue is on the front interface: the membrane keypad or touchpad. It costs less and keeps the current HMI in service. Choose the complete SIMATIC HMI touch screen when you need a full replacement panel, not a patch, and when the higher price fits your spares budget.
At a glance
| Consideration | Repair kit | Full touch screen |
| Price | USD 181.39 | USD 614.00 |
| Part number | 6AV2123-2GB03-0AX0 | 6AV2123-2GB03-0AX0 |
| Format | Membrane keypad + touchpad | Complete SIMATIC HMI touch screen |
| Country of origin | China | Germany |
Where each product wins
- The repair kit wins on budget and on application when you already have a KTP700 HMI and the damage is limited to the membrane keypad or touchpad. The price gap between the two options is more than $430.
- The full touch screen wins on completeness. It is the full SIMATIC HMI KTP700 unit, and it is the option that names the S7/300 controller platform, so it speaks more directly to a complete Siemens automation setup.
Product notes
Siemens KTP700 Membrane Keypad + Touchpad Repair Kit
The Siemens KTP700 Membrane Keypad + Touchpad Repair Kit is the lower-priced route to restoring the front of a KTP700 HMI. If you already have a working 6AV2123-2GB03-0AX0 unit and the only worn parts are the membrane keys or the touchpad, this gives you exactly those pieces without replacing the entire panel. The title is specific about the scope: it is a repair kit, not a complete HMI. That is also its limitation. If the display itself, the backlight, or the internal electronics are the problem, this kit leaves those unaddressed. It works best when the KTP700 chassis and screen are still usable. For a panel that just needs a new front interface, it is a much smaller investment than buying a whole touch screen.
6AV2123-2GB03-0AX0 Siemens SIMATIC HMI KTP700 Touch Screen
The 6AV2123-2GB03-0AX0 Siemens SIMATIC HMI KTP700 Touch Screen goes straight to replacement. It is a complete touch screen unit, so you do not have to reuse a worn membrane or touchpad. The same part number ties it to the same KTP700 family, and the product names S7/300 as the controller platform, which is a useful reference for Siemens S7 automation. The limitation is the price: it is the higher-priced option by a sizeable margin. If your current KTP700 only needs a new keypad and touchpad, paying the full-unit price may be more than the repair requires. But when you need a finished SIMATIC HMI panel rather than a spare part, this is the option that provides it.
Final choice by use case
- If the existing KTP700 is otherwise healthy and you need to restore the membrane keypad and touchpad, the $181.39 repair kit is the direct pick.
- If you need a complete replacement touch screen and the $614.00 price is within your spares budget, the full SIMATIC HMI touch screen is the unit to choose.
