# Panel cutouts: IEC inlet, rockers, barrel jack, USB-C, HDMI, LEDs, Neutrik D

> What size cutout does an IEC C14 power inlet need?

- Category: Hardware › Panel & connectors
- Kind: Hardware
- Basis: Manufacturer drawings for the common enclosure parts (IEC 60320 C14, KCD1/KCD4 rockers, DC-022 jack, Neutrik D-series); each file is a 2 mm test plate with the cutout
- Page: https://xemstudio.com/objects/panel-cutouts/ · JSON: https://xemstudio.com/api/geometry?object=panel-cutouts · Plain text: https://xemstudio.com/objects/panel-cutouts/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Notes

- IEC C14 snap-in: 27.5 × 19.5 mm (some drawings 27.4 × 19.4) in a 1–1.5 mm panel; screw-mount C14 adds two Ø3.2 holes on 40 mm centres. C13 outlets are larger: 30.5 × 22.5.
- KCD1 rocker (the 15 × 21 mm face): 19 × 13 mm cutout, 1–3 mm panel. KCD4 (big illuminated rocker): 30 × 22 mm.
- DC-022 panel barrel jack: Ø8 mm hole, M8 thread, panel to 3 mm. 5 mm LED: Ø5.1 press fit. Neutrik D-series (XLR, USB, HDMI, RJ45 modules): Ø24 with two Ø3.2 screw holes 24 mm apart.
- Print the test plate before cutting the enclosure; the cutout's clearance is included.

## Sizes

| part | cutout_mm | panel_mm | screw_holes |
|---|---|---|---|
| IEC C14 snap-in | 27.5 × 19.5 | 1.0–1.5 | none |
| IEC C14 screw-mount | 27.5 × 19.5 | to 3 | 2 × Ø3.2 @ 40 |
| IEC C13 outlet | 30.5 × 22.5 | 1.0–2.0 | none or 2 × Ø3.2 @ 40 |
| KCD1 rocker | 19 × 13 | 1–3 | none |
| KCD4 rocker | 30 × 22 | 1–3 | none |
| DC-022 barrel jack | Ø8 | to 3 | none |
| USB-C pass-through | 10 × 4.5 | any | none |
| microSD | 12 × 2.5 | any | none |
| HDMI A clearance | 16 × 6.5 | any | none |
| 5 mm LED | Ø5.1 | 1–3 | none |
| Neutrik D | Ø24 | to 3 | 2 × Ø3.2 @ 24 |

## Where the files are

- Neutrik: [D-series chassis connector drawings](https://www.neutrik.com/en/products/audio/xlr/xlr-chassis-connectors) — PDF, STEP — Neutrik site terms (verify at link)
- Wikipedia: [IEC 60320](https://en.wikipedia.org/wiki/IEC_60320) — web — CC BY-SA 4.0 (text)
- McMaster-Carr: [Panel-mount power inlets (free STEP/IGES/STL per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/power-inlets/) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Free STEP/STL (10 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/panel-cutouts/index.json

- cutout-iec-c14-snap-in: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-iec-c14-snap-in.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-iec-c14-snap-in.stl) — IEC 60320 C14 snap-in inlet, 1.0–1.5 mm panel (screw-mount versions use 2 × Ø3.2 at 40 mm)
- cutout-iec-c14-screw: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-iec-c14-screw.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-iec-c14-screw.stl) — IEC C14 screw-mount inlet cutout with 2 × Ø3.2 holes on 40 mm centres
- cutout-kcd1-rocker: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-kcd1-rocker.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-kcd1-rocker.stl) — KCD1 rocker switch (15 × 21 face), 1–3 mm panel
- cutout-kcd4-rocker: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-kcd4-rocker.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-kcd4-rocker.stl) — KCD4 rocker switch, 1–3 mm panel
- cutout-dc-022-barrel-jack: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-dc-022-barrel-jack.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-dc-022-barrel-jack.stl) — panel-mount 5.5 × 2.1 barrel jack (DC-022/DC-099), Ø8 hole, panel to 3 mm
- cutout-usb-c-panel: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-usb-c-panel.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-usb-c-panel.stl) — USB-C receptacle pass-through, 0.5 mm clearance each side
- cutout-microsd-slot: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-microsd-slot.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-microsd-slot.stl) — microSD push-push slot clearance, 12 × 2.5
- cutout-hdmi-a-cutout: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-hdmi-a-cutout.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-hdmi-a-cutout.stl) — HDMI type A plug clearance 16 × 6.5 (receptacle 15 × 5.9)
- cutout-led-5mm: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-led-5mm.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-led-5mm.stl) — 5 mm LED press fit; 3 mm LED uses Ø3.1
- cutout-neutrik-d: [STEP](https://xemstudio.com/files/hardware/panel-cutouts/cutout-neutrik-d.step) · [STL](https://xemstudio.com/files/hardware/panel-cutouts/cutout-neutrik-d.stl) — Neutrik D-series universal chassis cutout: Ø24 with 2 × Ø3.2 on 24 mm, panel to 3 mm

## Questions

**What size hole for an IEC C14 inlet?**

27.5 × 19.5 mm for the snap-in type in a 1–1.5 mm panel; the screw-mount type uses the same cutout plus two Ø3.2 holes 40 mm apart.

**What size hole for a KCD1 rocker switch?**

19 × 13 mm, panel 1–3 mm. The big KCD4 rocker needs 30 × 22 mm.

**What hole size for a panel-mount barrel jack?**

Ø8 mm for the common DC-022 / DC-099 5.5 × 2.1 jack (M8 nut); panel up to 3 mm.

**What is the Neutrik D-series cutout?**

Ø24 mm with two Ø3.2 screw holes on 24 mm centres; fits XLR, USB, HDMI, RJ45 and power modules.

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