# YSMC201208H-4R7MB

**YJYCOIN** · Power Inductors · 0805

YSMC201208H-4R7MB from YJYCOIN, in a 0805. 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 | YJYCOIN |
| Package | 0805 |
| 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 |  |  | 285 | 325 | mΩ |  | 7 |
| Heat rating current |  |  | 1.7 | 1.5 | A |  | 7 |
| Saturation current |  |  | 1.6 | 1.4 | A |  | 7 |
| Inductance tolerance (code M) |  | -20 |  | 20 | % | Tolerance code M = ±20% | 1 |
| Insulation resistance |  | 100 |  |  | MΩ | 100 VDC between inductor coil and the middle of the top surface of the body for 60 seconds | 24 |
| Inductance change after resistance to soldering heat |  | -10 |  | 10 | % | Solder temperature 260±5℃, immersion time 10±1 s | 24 |
| Inductance change after high temperature test |  | -10 |  | 10 | % | Temperature 125±2℃, time 1000 hours | 24 |
| Inductance change after low temperature test |  | -10 |  | 10 | % | Temperature -55±2℃, time 1000 hours | 24 |
| Inductance change after thermal shock |  | -10 |  | 10 | % | (-55±3)℃ and (125±3)℃, 32 cycles | 24 |
| Inductance change in temperature characteristic test |  | -10 |  | 10 | % | Pc-b, Pc-d (a:+20℃, b:-40℃, c:+20℃, d:+125℃, e:+20℃) | 24 |
| Inductance change after static humidity test |  | -10 |  | 10 | % | (95±3)%RH at (60±2)℃ for (1000±4) h | 24 |
| Inductance change after life test |  | -10 |  | 10 | % | Stored at (85±2)℃ for (1000±4) hours with Irms applied | 24 |
| Operating temperature |  | -55 |  | 125 | ℃ | Including self-temperature rise | 1 |
| Storage temperature (recommended) |  | 15 |  | 35 | ℃ | Recommended warehouse storage; humidity 25 to 75%RH | 23 |
| Part temperature (ambient + temperature rise) |  |  |  | 125 | ℃ | Worst case operating conditions | 23 |
| Peak package body temperature (Tc), Pb-free reflow | Tc |  |  | 260 | ℃ | Package thickness <1.6mm, volume <350 mm³ (Table 2) | 25 |
| Allowed re-flow times |  |  |  | 2 | times | Reflow per IPC/JEDEC J-STD-020D | 25 |
| Inductance | L |  | 4.7 |  | uH | @1MHz | 7 |

## CAD (KiCad official)

- Symbol: `YSMC201208H-4R7MB`
- Footprint: `Inductor_SMD:L_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `ysmc201208h-4r7mb-etched.step` / `ysmc201208h-4r7mb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ysmc201208h-4r7mb.step` / `ysmc201208h-4r7mb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YJYCOIN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604430389171933184) (30 pp, sha256 `4cdf5ed2b516c32e`, retrieved 2026-10-17, tier: lcsc)
- **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/ysmc201208h-4r7mb-datasheet.pdf)