Siemens Library: Qelectrotech

If you are an electrical engineer or a panel builder looking for a free, open-source alternative to expensive CAD software (like EPLAN or AutoCAD Electrical), you have likely encountered QElectroTech (QET).

While QET is powerful out of the box, its true potential for industrial automation lies in its component libraries. One of the most requested and valuable collections is the Siemens Library.

Use the built-in Element Editor to digitize Siemens datasheets. qelectrotech siemens library

Step-by-step for a Siemens 3RV2011-1AA10 circuit breaker:

Time required: ~15 minutes per complex component. (Ideal for your 10 most-used parts). If you are an electrical engineer or a

Different industries need different Siemens libraries. Here is how to tailor yours:

| Feature | QET + Siemens Library | Siemens TIA Selection Tool + EPLAN/AutoCAD | |---------|----------------------|---------------------------------------------| | Cost | Free | High licensing fees | | Official support | No | Yes (Siemens direct) | | Part number accuracy | Community maintained | Manufacturer verified | | PLC I/O import | No | Yes (via AML/EDZ) | | 3D panel layout | No | Yes | | Learning curve | Low | Steep | Time required: ~15 minutes per complex component

Siemens uses specific conventions:

Without a dedicated qelectrotech siemens library, you spend hours manually drawing an S7-1200 CPU with its 6 diagnostic LEDs, signal board, and terminal numbering. This kills productivity.