Littelfuse has partnered with SamacSys to provide free PCB symbols, footprints and 3D models. Explore our library of high-quality ECAD models, compatible with all major ECAD software, to accelerate your PCB design flow


Where can I find PCB symbols, footprints, and 3D models of Littelfuse products?

ECAD models are available for download or request on our product series and product part pages. Look for the Symbols & Models sign at the top of the page. Clicking it will lead you to the selection of available Partner ECAD Models. Alternatively, look for Partner ECAD Models Tab under Technical Resources



How do I import PCB symbols, footprints, and models into my ECAD software?

Install and run the Library Loader app (available for download HERE). Subsequent ECAD model downloads will go straight into your ECAD Tool.

Some 3D models are available in .IGS format and are compatible with major ECAD tools (AutoCAD, Autodesk’s Fusion, CATIA, Solid Edge, SOLIDWORKS) or can be opened with open-source software (IGS Viewer, ShareCAD, SketchUp, eDrawings Viewer).

ECAD Models are not available for download for a Littelfuse product I selected – what now?

Click on Build or Request PCB Symbol or Footprint, fill in and submit the request form. Requested model will be promptly delivered straight to your inbox

build or request icon


My request for Build or Request PCB Symbol or Footprint was abandoned – what now?
In case your request was abandoned due to missing or incorrect data, please reach out to us at
I don’t see a Symbols & Models on the product page. How do I request a PCB Symbol or Footprint?

Compatible with all major ECAD software



Getting started

Download the Library Loader tool for importing ECAD models into your PCB design software HERE



Build or Request PCB Symbol or Footprint

PCB Symbol and Footprint Available for Download 3D Model Available for Download