# 860040473003

**Würth Elektronik** · Aluminum electrolytic (radial) · Radial THT, 6.3 x 11.0 mm (P=2.5 mm)

100 µF, 25 V polarized aluminum electrolytic capacitor in a radial through-hole 6.3 mm x 11 mm can (2.5 mm lead pitch), from Würth's WCAP-ATUL series. Rated 105 °C with 5000 h load life, 350 mA ripple current at 100 kHz, and 0.25 ohm impedance. The default bulk / reservoir capacitor for power-supply smoothing and local energy storage. Polarized: observe the + and - terminals.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | + | passive | Positive (anode) terminal of the polarized aluminum electrolytic capacitor. Must be biased positive relative to the negative terminal; reverse voltage can damage or destroy the capacitor. Rated working voltage 25 V DC. |
| 2 | - | passive | Negative (cathode) terminal of the polarized aluminum electrolytic capacitor. Identified by the shorter lead wire and by a color band with minus signs on the sleeve. |

## Key specifications

| Parameter | Value |
|---|---|
| Type | Aluminum electrolytic (radial, polarized) |
| Capacitance | 100 µF ±20% |
| Rated voltage | 25 VDC |
| Rated temperature | 105 °C |
| Load life | 5000 h @ 105 °C |
| Ripple current | 350 mA @ 100 kHz |
| Impedance / ESR | 0.25 Ω @ 100 kHz |
| Package | Radial THT, 6.3 x 11 mm (2.5 mm pitch) |
| Body (Ø×H) | 6.3 × 11.0 mm |

## Ordering variants

Same part, different packaging or reel option.

- `860040473003 (radial 6.3x11 mm, bulk)`

## CAD (KiCad official)

- Symbol: `Device:C_Polarized`
- Footprint: `Capacitor_THT:CP_Radial_D6.3mm_P2.50mm`
- 3D model: CP_Radial_D6.3mm_P2.50mm (KiCad packages3D)
- 3D model files: `electrolytic-100uf-25v-etched.step` / `electrolytic-100uf-25v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `electrolytic-100uf-25v.step` / `electrolytic-100uf-25v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Würth Elektronik datasheet](https://www.we-online.com/components/products/datasheet/860040473003.pdf) (7 pp, sha256 `b611e617c41ef496`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/electrolytic-100uf-25v-datasheet.pdf)