# SDR-120 DIN rail power supply

Official SDR-120 DIN rail supply STEP archive for enclosure and terminal-access coordination. The native model is named SDR-120-24; verify applicability before using it for another output-voltage variant.

## Equipment and file summary

Equipment / resource: SDR-120 DIN rail power supply
Manufacturer: MEAN WELL
Resource type: Product family
Part number: SDR-120-12, SDR-120-24, SDR-120-48
Listed file formats: STEP, ZIP
Listed files: 1
Available previews: Manufacturer source / drawing request
Recorded revisions: Confirm the revision with the manufacturer
Source checked: 2026-10-29
Download access: Use the official manufacturer source or request the exact drawing

## Related GA references

- [MEAN WELL SDR-120 power supply](https://eloragrid.ai/objects/mean-well-sdr-120)
- [DIN-rail AC/DC power supply](https://eloragrid.ai/objects/ga-din-rail-ac-dc-power-supply)
- [AC UPS cabinet](https://eloragrid.ai/objects/ga-ac-ups-cabinet)

Canonical page: https://eloragrid.ai/tools/cad-library/equipment/mean-well-sdr-120
Manufacturer: MEAN WELL
Entry type: Product family
Part number: SDR-120-12, SDR-120-24, SDR-120-48
Category: Auxiliary power & UPS
Formats: STEP, ZIP
Market discovery: Global
Access: Direct download
Official source: https://www.meanwell.com.cn/webapp/product/search.aspx?prod=SDR-120
Manufacturer evidence: https://www.meanwell.com.cn/webapp/product/search.aspx?prod=SDR-120
Source checked: 2026-10-29

Download the unchanged original files from the official publisher using the links below. Confirm the latest revision and selected product configuration before design use.
Manufacturer global brand with files served by its official China website. Confirm the selected regional product, voltage and approvals.
This series-level housing model does not distinguish output-voltage ratings. Check the part number and ventilation/installation clearances in the manufacturer documentation before use. The native STEP filename identifies SDR-120-24; listings of other output voltages are not proof of identical mechanical geometry.


## In plain English

### What the equipment does

A power supply turns incoming electrical power into the voltage and form needed by connected equipment.

### A simple example

In a switchgear control panel, an AC-to-DC power supply can provide DC power for relays, controller modules and indication circuits.

### What the drawings help you do

Use an outline or mounting drawing to plan where the equipment fits and where it attaches. Use a connection drawing to trace its electrical interfaces. A 3D model helps coordinate space; check the manufacturer's installation requirements separately.

### Terms

- CAD: Computer-aided design files used to prepare drawings and models.
- Revision: The recorded version of a drawing or model.

Concept diagram: Incoming supply → Power supply → Required control power
A simplified explanation of how this item works. It does not show terminal wiring or an operating procedure.

- [MEAN WELL official source](https://www.meanwell.com.cn/webapp/product/search.aspx?prod=SDR-120)


## Which file should I choose?

Start with SDR-120-12, SDR-120-24, SDR-120-48. The files above belong to MEAN WELL's SDR-120 DIN rail power supply resource; match any model or option suffix in the filename to your selected unit.
Available here: ZIP. The original filename is SDR-120-3D.zip.

## Official files

- SDR-120-3D.zip (ZIP): https://www.meanwell.com.cn/upload/pdf/SDR-120/SDR-120-3D.zip
  Site download: not publicly hosted
  Rights review: Official manufacturer download page and linked product-liability disclaimer reviewed. ZIP contains only the named STEP, with valid ISO-10303-21 header and no detected reproduction/confidentiality notice or separate licence. No explicit prohibition identified in these inspected materials; redistribution permission remains unconfirmed and no licence is asserted.; evidence: https://www.meanwell.com.cn/webapp/product/search.aspx?prod=SDR-120, https://www.meanwell.com/serviceDisclaimer.aspx
  Purpose: Manufacturer 3D enclosure STEP archive; acquired: true; redistribution: unknown; SHA-256: e9df6e0e3ae10fb3be2d03610e9960231f72c948a35012e8d04a48ad33c89e04; revision: not recorded
  - SDR-120/SDR-120.stp

Global discovery is not proof of regional certification. Confirm exact configuration, revision, dimensional units and use rights with the manufacturer.