# 0438006.WRGT

**Littelfuse** · Disposable Fuses · 0603

0438006.WRGT from Littelfuse, 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 | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| 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 |
|---|---|---|---|---|---|---|---|
| Opening time at 100% of ampere rating |  | 4 |  |  | hours | 100% of ampere rating, at 25ºC; table prints '4 Hours, Minimum' | 1 |
| Opening time at 250% of ampere rating |  |  |  | 5 | seconds | 250% of ampere rating, at 25ºC; table prints '5 Seconds, Maximum' | 1 |
| Operating temperature range |  | -55 |  | 150 | ºC | Feature list: operating temperature from -55ºC to +150ºC | 1 |
| Maximum voltage rating (6A, amp code 006.) |  |  |  | 24 | V | Max. voltage rating for 6 A, amp code 006. | 1 |
| Interrupting rating (6A, amp code 006.) |  |  |  | 50 | A | 50A @ 24VDC/12VAC; AC tested at rated voltage with unity power factor, DC with time constant <0.8 msec | 1 |
| Nominal resistance (6A, amp code 006.) |  |  | 0.0086 |  | Ω | Measured with <10% rated current | 1 |
| Nominal melting I2t (6A, amp code 006.) |  |  | 1.444 |  | A2Sec. | Measured at 1 msec. opening time | 1 |
| Nominal voltage drop at rated current (6A, amp code 006.) |  |  | 0.07 |  | V | Measured at rated current after temperature has stabilized | 1 |
| Nominal power dissipation at rated current (6A, amp code 006.) |  |  | 0.42 |  | W | At rated current (6 A) | 1 |
| Continuous operating current derating |  |  |  | 80 | % of rated current | Continuous operation; devices recommended to be operated at no more than 80% rated current | 1 |
| Peak reflow temperature |  |  | 260 | 260 | ºC | Pb-free reflow profile: peak temperature TP 260 +0/-5 °C; do not exceed 260°C | 2 |
| Wave soldering temperature and time |  |  |  | 260 | ºC | Wave soldering 260°C, 10 seconds max. | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | Terminations: Ag / Ni / Sn (100% Lead-free) Element Cover Coating: Lead-free Glass | 3 |

## CAD (KiCad official)

- Symbol: `0438006.WRGT`
- Footprint: `Fuse:Fuse_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `0438006-wrgt-etched.step` / `0438006-wrgt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `0438006-wrgt.step` / `0438006-wrgt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588910129190211584) (3 pp, sha256 `8955cda3ab3cbc54`, retrieved 2026-10-19, 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/0438006-wrgt-datasheet.pdf)