Free control panel layout blocks for AutoCAD (DWG): enclosures, rail devices, door devices, terminals, cooling

About the dimensions

Panel devices are not standardised as a drawing, so the blocks use typical values of common device classes: MCB poles of 17.5 mm and 90 mm height, contactors of 45 to 150 mm width, rail 35 x 7.5 mm, 22.3 mm holes for 22 mm operators, common HMI and meter cutouts. The outline of a real device differs a little between manufacturers; check the data sheet before you fix the layout.

The blocks are our own drawings, not copies of any manufacturer's catalogue, and the library is not certified. They are meant to arrange devices on a back panel and door, count them and check spacing on a drawing, not to prove that a panel meets heating, clearance or short-circuit requirements. Spacing, derating and wiring space come from the device data and the panel standards that apply to your design.

Frequently asked questions

Which items are in the library?

Enclosures, rails ducts and mounting, protection devices, switching and motor control, control and automation, terminals and busbars, door and operator devices, cooling and ventilation, and layout markers. The page above lists every group with its count.

Are the devices from one manufacturer?

No. The blocks are generic: they use the common width in modules and the typical height of the device class, not the outline of a particular brand. Put the manufacturer and the article number in the attributes, and replace a block by the manufacturer's own drawing where the exact outline matters.

Can I use the symbols in commercial projects?

Yes. They are free to use and modify in your own projects, including commercial ones. They are provided as is, without warranty.

Can I use these blocks for a bill of materials?

Yes. Each block carries MANUFACTURER, ARTICLE_NO and QTY attributes, and the rating attributes of its class, so exporting the layout with BlockSync gives a list with the quantities counted from the drawing. Fill in the attributes when you place the device.

Can I change a symbol or add attributes?

Yes. Open the DWG, edit a block with BEDIT to change it or add attributes, and save. To update drawings that already contain the block, run ATTSYNC or replace the block. Make a backup first: attribute values can be lost if ATTSYNC is used carelessly.

Where do I find a ready-made set of these symbols for AutoCAD?

AutoCAD itself ships only a small set of sample blocks, so a full symbol set has to come from a library. Download the ZIP on this page and open the DWG: every symbol is a block. Insert one with INSERT (Blocks palette, Libraries tab, then pick the DWG) or drag it from DesignCenter (ADCENTER). You can also download a single symbol on its own.