# MEAN WELL LRS-350-12 power supply (case 207A): 215 × 115 × 30 case and M4 mounting holes

> What are the MEAN WELL LRS-350-12 dimensions and mounting-hole positions?

- Category: Electronic components › Modules, sensors & displays
- Kind: Modern device
- Basis: MEAN WELL LRS-350 series specification, Mechanical Specification for case No. 207A.
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## Overall (mm)

| length | width | height |
|---|---|---|
| 215.0 | 115.0 | 30.0 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Datum: case centre; terminal-block end at −x, bottom at 0. Case 215.0 × 115.0 × 30.0 (case 207A, shared by the LRS-350 series).
- Bottom: 4 × M4 threaded holes, 3 mm thread length, on a 150.0 × 50.0 pattern centred on the case (32.5 from each end and each long edge).
- Sides: 2 × M4 threaded holes in each long side, 5 mm thread length, 150.0 apart, 12.5 above the bottom. All M4 holes are modelled at the Ø3.3 tap-drill size.
- The 9-position screw terminal (AC/L, AC/N, FG, 3 × −V, 3 × +V) sits recessed in the top of the −x end; the fan sits under a flush grille in the top, centred 47.45 from the +x end and 36.7 from the +y edge; air enters through the top.
- Not modelled: terminal block, fan grille and vent slots (all inside or flush with the case), optional mounting brackets.
- Dimensions are exact nominal (true size), no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| bottom M4 holes | 4 × M4 on 150.0 × 50.0, 3 mm thread | M4 screws through the mounting plate; screw may enter at most 3 mm | designed | all |
| side M4 holes | 2 × M4 per side, 150.0 apart, 12.5 up, 5 mm thread | M4 screws through an L-bracket or side wall; at most 5 mm into the case | designed | all |

## Sizes

| holes | face | positions from case centre (mm) | thread |
|---|---|---|---|
| 4 | bottom | x ±75.0, y ±25.0 | M4, 3 mm deep |
| 2 | −y side | x ±75.0, 12.5 above bottom | M4, 5 mm deep |
| 2 | +y side | x ±75.0, 12.5 above bottom | M4, 5 mm deep |

## Where the files are

- MEAN WELL: [LRS-350 series specification](https://www.meanwell.com/Upload/PDF/LRS-350/LRS-350-SPEC.PDF) — web — Publisher's page; dimensions are facts
- MEAN WELL: [LRS-350 product datasheet](https://www.meanwell.com/productPdf.aspx?i=459) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/meanwell-lrs-350-12/index.json

- meanwell-lrs-350-12: [STEP](https://xemstudio.com/files/hardware/meanwell-lrs-350-12/meanwell-lrs-350-12.step) · [STL](https://xemstudio.com/files/hardware/meanwell-lrs-350-12/meanwell-lrs-350-12.stl) — MEAN WELL LRS-350-12 power supply (case 207A): 215 × 115 × 30 case and M4 mounting holes

## Questions

**How big is the LRS-350-12?**

215 × 115 × 30 mm (case 207A).

**What is the bottom mounting-hole pattern?**

Four M4 holes on 150 × 50 mm, centred on the case; thread length 3 mm, so the screw may enter at most 3 mm.

**Can it be side-mounted?**

Yes: two M4 holes in each long side, 150 mm apart and 12.5 mm above the bottom, 5 mm thread length.

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- [Metric wire sizes (IEC 60228): 0.5 to 2500 mm² with strands and conductor diameter, and the nearest AWG](https://xemstudio.com/objects/metric-wire-sizes-iec-60228-mm2-awg/)
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- [Thread size reference: UNC / UNF and ISO metric coarse / fine — major, minor and pitch diameter, tap drill, clearance hole (close, normal, loose)](https://xemstudio.com/objects/thread-reference-tap-drills-clearance/)