# ERS1KM331W25OT

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

ERS1KM331W25OT 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 |
|---|---|---|---|---|---|---|---|
| Capacitance tolerance |  | -20 |  | 20 | % | at 20°C, 120Hz; MPN letter M | 7 |
| Endurance |  | 4000 |  | 10000 | h | +105°C; DC voltage plus rated ripple current applied; restored to 20°C | 7 |
| Capacitance change (endurance) |  | -20 |  | 20 | % | +105°C endurance; relative to initial value | 7 |
| Dissipation factor (endurance) | tanδ |  |  | 200 | % | +105°C endurance; of the initial specified value | 7 |
| Capacitance change (shelf life) |  | -20 |  | 20 | % | +105°C, no load, 1,000 h; restored to 20°C; relative to initial value | 7 |
| Dissipation factor (shelf life) | tanδ |  |  | 200 | % | +105°C, no load, 1,000 h; of the initial specified value | 7 |
| Leakage current (shelf life) |  |  |  | 200 | % | +105°C, no load, 1,000 h; of the initial specified value | 7 |
| Nominal capacitance | C |  | 330 |  | µF | at 20°C, 120Hz | 7 |

## CAD (KiCad official)

- Symbol: `ERS1KM331W25OT`
- Footprint: `Capacitor_THT:CP_Radial_D12.5mm_P5.00mm`
- 3D model: CP_Radial_D12.5mm_P5.00mm (KiCad packages3D, STEP)
- 3D model files: `ers1km331w25ot-etched.step` / `ers1km331w25ot-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ers1km331w25ot.step` / `ers1km331w25ot.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/8603103729223032832) (10 pp, sha256 `a61f25f568c99985`, 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/ers1km331w25ot-datasheet.pdf)