# MEAN WELL SDR-120 power supply

Canonical URL: https://eloragrid.ai/objects/mean-well-sdr-120
Publisher: Elora Grid
Updated: 2026-10-29
Lookup label: SDR-120
Drawing use: GA
Reference families: Manufacturer

DIN-rail power-supply family with 12 V, 24 V and 48 V variants.

## In plain English

### What it 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 the selected manufacturer's drawings to check the equipment's size, mounting points and cable connections. The layout helps you plan where it fits and how it can be reached for maintenance. An illustrative 3D preview does not establish product dimensions or required clearances.

### Terms

- Voltage: The electrical potential difference between two points, measured in volts.
- Rating: A value stating the conditions for which equipment is specified.
- Schematic: A drawing showing function and connections rather than physical appearance.

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 SDR-120 official product and CAD resources](https://www.meanwell.com.cn/webapp/product/search.aspx?prod=SDR-120)


## What it represents

Locate the supply with accessible incoming power and DC output terminations. Coordinate any adjacent redundancy or distribution modules as separate equipment objects.
The GA illustration is independently authored conceptual geometry, without dimensions or scale. Refer to the manufacturer STEP and selected product instructions for the actual mounting envelope.

## How to read it

- The downloaded SDR-120 STEP has an internal filename identifying SDR-120-24; verify applicability before using that geometry for another voltage variant.
- A family download label does not prove every listed electrical option has an identical physical configuration.

## Information to show or reference

- Record the complete output-voltage order code.
- Check the selected CAD configuration, terminal access and rail attachment.
- Apply manufacturer installation spacing and reserve cable bend and replacement space.

## Important distinction

A family download label does not prove every listed electrical option has an identical physical configuration.

## Facts

- Manufacturer: MEAN WELL
- Family: SDR-120
- Listed variants: SDR-120-12, SDR-120-24, SDR-120-48
- Illustration: Original conceptual GA; unitless, not a manufacturer outline

## Public references

- [MEAN WELL SDR-120 official product and CAD resources](https://www.meanwell.com.cn/webapp/product/search.aspx?prod=SDR-120) — MEAN WELL. Official family resource listing electrical variants and the downloadable 3D archive.

## Graphic scope

No standalone 2D icon is supplied. Manufacturer drawings are shown only where an exact source match is available. Other equipment previews are 3D thumbnails, not dimensional drawings.