# PRG21BC0R2MM1RA

**Murata Electronics** · Resettable Fuses · 0805

PRG21BC0R2MM1RA from Murata Electronics, 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 | One of two Sn-plated external electrodes on the BaTiO3 semiconductive ceramic PTC element; for the PRG21BC0R2MM1RA (0.2Ω) the ratings are max voltage DC6V and max current 10.0A. |
| 2 | 2 | passive | The other Sn-plated external electrode of the PTC element; the body is not insulated, so an adequate distance to surrounding components and wiring must be kept. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Murata Electronics |
| Package | 0805 |
| 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (part-number letter M) |  | -20 |  | 20 | % | Resistance at 25°C; Ratings table ±20% | 1 |
| Resistance at 25°C | R25 |  | 0.2 |  | ohm |  | 1 |
| Max. voltage |  |  |  | 6 | V |  | 1 |
| Max. current |  |  |  | 10 | A | Footnote *2: passed continuously without tripping at 25°C, 60°C and 85°C | 1 |
| Hold current |  |  | 750 |  | mA | at +25°C | 1 |
| Hold current |  |  | 500 |  | mA | at +60°C | 1 |
| Hold current |  |  | 315 |  | mA | at +85°C | 1 |
| Trip current |  |  | 2100 |  | mA | at -20°C | 1 |
| Trip current |  |  | 2000 |  | mA | at -10°C | 1 |
| Trip current |  |  | 1620 |  | mA | at +25°C | 1 |
| Thermal dissipation coefficient of mounting state (rating basis) |  |  | 10 |  | mW/°C | Footnote *4: ratings valid for this mounting state; other values may differ | 1 |

## CAD (KiCad official)

- Symbol: `PRG21BC0R2MM1RA`
- Footprint: `Fuse:Fuse_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `prg21bc0r2mm1ra-etched.step` / `prg21bc0r2mm1ra-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `prg21bc0r2mm1ra.step` / `prg21bc0r2mm1ra.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Murata Electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903730758893568) (7 pp, sha256 `3788dd6dd5891b67`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/prg21bc0r2mm1ra-datasheet.pdf)