# EWH1HM681W20OT

**AISHI Aihua Group** · Aluminum Electrolytic Capacitors - Leaded · CP_Radial_D12.5mm_P5.00mm

EWH1HM681W20OT from AISHI Aihua Group, in a CP_Radial_D12.5mm_P5.00mm. 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 a POLARISED capacitor (Capacitors / Aluminum Electrolytic Capacitors - Leaded). Which terminal is the anode (+) is not yet recorded on this page: read it from the maker's datasheet before placing. |
| 2 | 2 | passive | Terminal 2 of a POLARISED capacitor (Capacitors / Aluminum Electrolytic Capacitors - Leaded). Which terminal is the anode (+) is not yet recorded on this page: read it from the maker's datasheet before placing. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | AISHI Aihua Group |
| Package | CP_Radial_D12.5mm_P5.00mm |
| Category | Capacitors |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature range (category temperature range) | T | -40 |  | 105 | °C | Rated voltage 6.3-100 Vdc | 7 |
| Capacitance tolerance (part-number tolerance code M) |  | -20 |  | 20 | % | Tol. code M = ±20% | 1 |
| Capacitance change after endurance test | ΔC | -20 |  | 20 | % | Relative to initial value; after 2000 h at 105°C with DC voltage plus rated ripple current | 7 |
| Capacitance change after shelf life test | ΔC | -20 |  | 20 | % | Relative to initial value; after 1000 h at 105°C without voltage | 7 |
| Dissipation factor (tanδ) max | tanδ |  |  | 0.1 |  | Rated voltage 50 Vdc column; at 20°C, 120 Hz | 7 |
| Dissipation factor after endurance test | tanδ |  |  | 200 | % of initial specified value | After 2000 h at 105°C with DC voltage plus rated ripple current | 7 |
| Dissipation factor after shelf life test | tanδ |  |  | 200 | % of initial specified value | After 1000 h at 105°C without voltage applied | 7 |
| Leakage current after shelf life test | I_L |  |  | 200 | % of initial specified value | After 1000 h at 105°C without voltage applied | 7 |
| Rated voltage (part-number voltage code 1H) | VR |  | 50 |  | V | Voltage code 1H decodes to 50 Vdc per voltage code table | 1 |
| Nominal capacitance (part-number code 681) | C |  | 680 |  | µF | Capacitance code 681 decodes to 680 µF | 1 |
| Peak temperature, flow soldering (radial lead) |  |  |  | 260 | °C | Flow soldering, radial lead type; as printed in soldering recommendation | 5 |

## CAD (KiCad official)

- Symbol: `EWH1HM681W20OT`
- Footprint: `Capacitor_THT:CP_Radial_D12.5mm_P5.00mm`
- 3D model: CP_Radial_D12.5mm_P5.00mm (KiCad packages3D, STEP)
- 3D model files: `ewh1hm681w20ot-etched.step` / `ewh1hm681w20ot-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ewh1hm681w20ot.step` / `ewh1hm681w20ot.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [AISHI Aihua Group datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588898732703801344) (9 pp, sha256 `53d74143b46ed9a9`, retrieved 2026-11-06, 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/ewh1hm681w20ot-datasheet.pdf)