# Buzzers and beepers: 12 mm, 15 mm magnetic; TDK PS1240 piezo

> What are the dimensions of a 12 mm buzzer?

- Category: Electronics › Indicators
- Kind: Standard part
- Basis: KiCad 3D models of common PCB buzzers (12 × 9.5 mm and 15 × 7.5 mm magnetic with 7.6 mm pin spacing; TDK PS1240 12 mm piezo; CUI CST-931)
- Page: https://xemstudio.com/objects/buzzers-tht/ · JSON: https://xemstudio.com/api/geometry?object=buzzers-tht · Plain text: https://xemstudio.com/objects/buzzers-tht/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Notes

- 12 mm magnetic buzzer (the black cylinder on Arduino kits): Ø12 × 9.5 mm, pins 7.6 mm apart, sound hole on top; needs a Ø3–4 mm hole in the case within 2 mm of the port.
- 15 mm: Ø15 × 7.5 mm, same 7.6 mm pitch. TDK PS1240 piezo: Ø12.2 × 6.5 mm, 5 mm pitch; passive, drive with a square wave.
- A printed resonant chamber (Ø12 cavity 3 mm deep over the port, exiting through a Ø2.5 hole) makes a 12 mm buzzer noticeably louder.

## Sizes

| part | bbox_l_mm | bbox_w_mm | bbox_h_mm |
|---|---|---|---|
| 12x9.5rm7.6 | 12.5 | 12.0 | 12.0 |
| 15x7.5rm7.6 | 15.0 | 15.0 | 10.5 |
| mallory-ast1109mltrq | 15.0 | 9.0 | 2.0 |
| tdk-ps1240p02bt | 21.5 | 12.0 | 12.0 |
| cui-cst-931rp-a | 10.8 | 9.0 | 9.0 |
| kingstate-kcg0601 | 6.8 | 6.6 | 6.6 |
| prosignal-abt-410-rc | 12.0 | 12.0 | 11.5 |

## Where the files are

- KiCad: [kicad-packages3D library (origin of these files)](https://gitlab.com/kicad/libraries/kicad-packages3D) — STEP, WRL — CC BY-SA 4.0 with KiCad exception

## Free STEP/STL (7 parts, CC BY-SA 4.0 (KiCad library license, with the KiCad exception), KiCad library contributors)

Index: https://xemstudio.com/files/kicad/buzzers-tht/index.json · license: https://xemstudio.com/files/kicad/buzzers-tht/LICENSE.md

- 12x9.5rm7.6: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/12x9.5rm7.6.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/12x9.5rm7.6.stl) — KiCad Buzzer_Beeper: Buzzer_12x9.5RM7.6; bbox 12.5 × 12.0 × 12.0 mm
- 15x7.5rm7.6: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/15x7.5rm7.6.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/15x7.5rm7.6.stl) — KiCad Buzzer_Beeper: Buzzer_15x7.5RM7.6; bbox 15.0 × 15.0 × 10.5 mm
- mallory-ast1109mltrq: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/mallory-ast1109mltrq.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/mallory-ast1109mltrq.stl) — KiCad Buzzer_Beeper: Buzzer_Mallory_AST1109MLTRQ; bbox 15.0 × 9.0 × 2.0 mm
- tdk-ps1240p02bt: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/tdk-ps1240p02bt.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/tdk-ps1240p02bt.stl) — KiCad Buzzer_Beeper: Buzzer_TDK_PS1240P02BT; bbox 21.5 × 12.0 × 12.0 mm
- cui-cst-931rp-a: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/cui-cst-931rp-a.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/cui-cst-931rp-a.stl) — KiCad Buzzer_Beeper: MagneticBuzzer_CUI_CST-931RP-A; bbox 10.8 × 9.0 × 9.0 mm
- kingstate-kcg0601: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/kingstate-kcg0601.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/kingstate-kcg0601.stl) — KiCad Buzzer_Beeper: MagneticBuzzer_Kingstate_KCG0601; bbox 6.8 × 6.6 × 6.6 mm
- prosignal-abt-410-rc: [STEP](https://xemstudio.com/files/kicad/buzzers-tht/prosignal-abt-410-rc.step) · [STL](https://xemstudio.com/files/kicad/buzzers-tht/prosignal-abt-410-rc.stl) — KiCad Buzzer_Beeper: MagneticBuzzer_ProSignal_ABT-410-RC; bbox 12.0 × 12.0 × 11.5 mm

## Questions

**What is the pin spacing of a 12 mm buzzer?**

7.6 mm (0.3 in). The 15 mm buzzers use the same 7.6 mm spacing; the TDK PS1240 piezo uses 5 mm.

**How tall is a 12 mm buzzer?**

9.5 mm for the common 12 × 9.5 magnetic buzzer; 6.5 mm for the PS1240 piezo.

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