# SMD0603-004C-24V

**BNstar** · Resettable Fuses · 0603

SMD0603-004C-24V from BNstar, in a 0603. 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 PTC device (end electrode); rated for 0.04 A hold / 0.12 A trip current at 25℃ and Vmax 24.0 V, Imax 20 A. |
| 2 | 2 | passive | Other terminal of the non-polarized PTC device (end electrode); rated for 0.04 A hold / 0.12 A trip current at 25℃ and Vmax 24.0 V, Imax 20 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BNstar |
| Package | 0603 |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum resistance, initial un-soldered state (Rmin) | Rmin | 3.7 |  |  | Ω | initial (un-soldered) state | 1 |
| Maximum resistance at 25℃ one hour after reflow (R1max) | R1max |  |  | 40 | Ω | 25℃, measured one hour after reflow soldering of 260℃ for 20 sec | 1 |
| Maximum continuous voltage (Vmax) | Vmax |  |  | 24 | V | at rated current | 1 |
| Maximum fault current (Imax) | Imax |  |  | 20 | A | at rated voltage, 25℃ | 1 |
| Maximum time to trip (Ttrip) | Ttrip |  |  | 1 | s | at trip current 0.20 A | 1 |
| Recommended storage temperature |  |  |  | 40 | ℃ | recommended storage conditions | 2 |
| Recommended storage relative humidity |  |  |  | 70 | % R.H. | recommended storage conditions, 40°C max | 2 |
| Reflow soldering temperature |  |  |  | 260 | ℃ | reflow soldering for 20 sec | 2 |
| Hold current (IH) | IH |  | 0.04 |  | A | 25℃ still air | 1 |
| Trip current (IT) | IT |  | 0.12 |  | A | 25℃ still air | 1 |
| Typical power dissipation (Pdtyp) | Pdtyp |  | 0.5 |  | W | typical, in air environment | 1 |

## CAD (KiCad official)

- Symbol: `SMD0603-004C-24V`
- Footprint: `Fuse:Fuse_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `smd0603-004c-24v-etched.step` / `smd0603-004c-24v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smd0603-004c-24v.step` / `smd0603-004c-24v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BNstar datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387723713421312) (3 pp, sha256 `18158ca70e296e3f`, retrieved 2026-10-17, tier: lcsc)
- **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/smd0603-004c-24v-datasheet.pdf)