# CMT-8530S-SMT-TR

**Same Sky (Formerly CUI Devices)** · Buzzers · SMD, 8.5x8.5mm

CMT-8530S-SMT-TR from Same Sky (Formerly CUI Devices), in a SMD, 8.5x8.5mm. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | + | passive | +POLARITY terminal (bottom-right in the p.2 PCB layout top view). Number by convention; Same Sky prints none. |
| 2 | - | passive | -POLARITY terminal (top-right in the p.2 PCB layout top view). |
| 3 | NC | no_connect | NC corner pad, bottom-left in the p.2 PCB layout top view (mechanical, solder only). |
| 4 | NC | no_connect | NC corner pad, top-left in the p.2 PCB layout top view (mechanical, solder only). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Same Sky (Formerly CUI Devices) |
| Package | SMD, 8.5x8.5mm |
| Category | Audio Products / Vibration Motors |
| Pins | 4 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| operating voltage |  | 3 |  | 5 | Vo-p |  | 1 |
| operating temperature |  | -30 |  | 75 | °C |  | 1 |
| storage temperature |  | -40 |  | 85 | °C |  | 1 |
| coil resistance |  | 13 | 16 | 19 | Ω |  | 1 |
| sound pressure level at 10 cm (A-weight) |  | 87 | 90 |  | dBA | rated voltage, 2,730 Hz square wave, ½ duty | 1 |
| current consumption |  |  |  | 90 | mA | at rated voltage, 2,730 Hz square wave, ½ duty | 1 |
| rated voltage |  |  | 3.6 |  | Vo-p |  | 1 |
| rated frequency |  |  | 2730 |  | Hz |  | 1 |
| reel storage relative humidity |  |  |  | 30 | °C | at relative humidity <60% | 1 |
| reflow soldering temperature |  |  |  | 260 | °C | see recommended reflow soldering profile | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | gold | terminal SMT type (Au plating) operating temperature -30 75 °C | 1 |

## CAD (KiCad official)

- Symbol: `CMT-8530S-SMT-TR`
- Footprint: `Adom_Gen:Same_Sky_Formerly_CUI_Devices__CMT-8530_c3e78c`
- 3D model: SMD, 8.5x8.5mm (KiCad packages3D, STEP)
- 3D model files: `cmt-8530s-smt-etched.step` / `cmt-8530s-smt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmt-8530s-smt.step` / `cmt-8530s-smt.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Same Sky (Formerly CUI Devices) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589839590589689856) (4 pp, sha256 `f8ed8cb7e7a4f0bf`, retrieved 2026-11-10, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cmt-8530s-smt-datasheet.pdf)