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).
Standard Library: Most common Siemens symbols are pre-installed in the QET Collection. Look under categories like Programmable Logic Controllers > Siemens or Switchgear. qelectrotech siemens library
Design a clear folder and metadata scheme so symbols are searchable and usable across projects: ⚡ Unlocking Siemens Automation with QElectroTech: A Guide
Drag and Drop: Dragging the symbol onto the workspace where it automatically connects to aligned conductors. and completeness of commercial tools
The QElectroTech Siemens Library is a valuable, cost-free resource for creating electrical schematics that incorporate real Siemens hardware. While it lacks official support, automated workflows, and completeness of commercial tools, it serves excellently for small to medium projects, education, prototyping, and maintenance documentation. Users should be prepared to manually verify, extend, and maintain their library copies. For professional, large-scale industrial projects requiring full Siemens integration, proprietary software remains necessary, but QET with the Siemens library offers an impressive open-source alternative.
QElectroTech (QET) organizes its components into three distinct types of collections to manage different manufacturers like Siemens:
If you find a Siemens library folder (containing .elmt files), you can add it to your setup: Official elements collection for QElectroTech. - GitHub
Siemens_AG/
├── Automation/
│ ├── PLC_S7-1200/
│ │ ├── CPU_1211C_ACDC_RLY.elmt
│ │ ├── SM_1221_DI8.elmt
│ │ └── CM_1241_RS485.elmt
│ ├── PLC_S7-1500/
│ └── LOGO/
│ ├── LOGO_12_24RCE.elmt
│ └── LOGO_AM2.elmt
├── Protection/
│ ├── MCB_5SY/
│ ├── MCCB_3VA/
│ └── Motor_Starter_3RV/
├── Switching/
│ ├── Contactor_3RT/
│ └── Relay_3RH/
└── HMI/
├── KTP400_Basic_PN/
└── KTP700_Comfort/