# 500mA

**DOWO** · Resettable Fuses · 1206

500mA from DOWO, in a 1206. 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 | One terminal of the non-polarized resettable PTC fuse (IH 0.50 A, IT 1.00 A, Vmax 24 V, Imax 40 A). |
| 2 | 2 | passive | Other terminal of the non-polarized resettable PTC fuse (IH 0.50 A, IT 1.00 A, Vmax 24 V, Imax 40 A). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | 1206 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Hold current (maximum current at which device will not trip) | IH |  |  | 0.5 | A | 25℃ still air | 1 |
| Trip current (minimum current at which device will always trip) | IT | 1 |  |  | A | 25℃ still air | 1 |
| Maximum voltage device can withstand without damage | Vmax |  |  | 24 | V | at rated current | 1 |
| Maximum fault current device can withstand without damage | Imax |  |  | 40 | A | at rated voltage | 1 |
| Maximum time to trip | Ttrip |  |  | 0.1 | s | at assigned trip current 8.0 A | 1 |
| Minimum device resistance prior to tripping | Rmin | 0.15 |  |  | Ω | 25℃ prior to tripping | 1 |
| Maximum device resistance in nontripped state | R1max |  |  | 0.7 | Ω | nontripped state 1 hour post reflow | 1 |

## CAD (KiCad official)

- Symbol: `500mA`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `500ma-etched.step` / `500ma-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `500ma.step` / `500ma.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOWO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904749921554432) (2 pp, sha256 `1edae30e032eb087`, 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 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (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/500ma-datasheet.pdf)