# SMTC322512-4R7M

**SXN Shun Xiang Nuo Elec** · Power Inductors · 1210

SMTC322512-4R7M from SXN Shun Xiang Nuo Elec, in a 1210. 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 | 1 | passive | Terminal 1 of an unpolarised inductor or ferrite bead; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised inductor or ferrite bead; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SXN Shun Xiang Nuo Elec |
| Package | 1210 |
| Category | Inductors, Coils, Chokes |
| Pins | 2 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DC resistance (DCR) | DCR |  | 115 | 135 | mΩ |  | 2 |
| Inductance tolerance (M suffix) |  | -20 |  | 20 | % |  | 1 |
| Operating temperature |  | -55 |  | 125 | ℃ | Including coil self-temperature rise | 1 |
| Saturation current (Isat) | Isat |  | 2.9 |  | A | Inductance drops 30% from its value without current | 2 |
| Heat rating current |  |  | 2.3 |  | A | ΔT 40℃ (Ta=25℃) | 2 |
| Inductance (nominal) | L |  | 4.7 |  | μH | 1MHz 1.0V @0A | 2 |

## CAD (KiCad official)

- Symbol: `SMTC322512-4R7M`
- Footprint: `Inductor_SMD:L_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `smtc322512-4r7m-etched.step` / `smtc322512-4r7m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smtc322512-4r7m.step` / `smtc322512-4r7m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SXN Shun Xiang Nuo Elec datasheet](docs/smtc322512-4r7m-datasheet.pdf) (11 pp, sha256 `d92cd7c456e7425d`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/smtc322512-4r7m-datasheet.pdf)