# 045802.5DR

**Littelfuse** · Disposable Fuses · 1206

045802.5DR from Littelfuse, 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 | 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 | 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 |
|---|---|---|---|---|---|---|---|
| Opening time at 100% of ampere rating |  | 4 |  |  | hours | 100% of ampere rating | 1 |
| Opening time at 250% of ampere rating |  |  |  | 5 | s | 250% of ampere rating | 1 |
| Max voltage rating |  |  |  | 75 | V |  | 1 |
| Interrupting rating |  |  |  | 50 | A | @ 75VDC | 1 |
| Insulation resistance (after opening) |  | 10000 |  |  | Ohms | MIL-STD-202, Method 302, Test Condition A | 3 |
| Operating temperature |  | -55 |  | 125 | °C | with proper derating | 3 |
| Peak temperature (reflow, Pb-free) | TP |  |  | 260 | °C | Do not exceed 260°C | 2 |
| Time 25°C to peak temperature |  |  |  | 8 | minutes |  | 2 |
| Ampere rating |  |  | 2.5 |  | A |  | 1 |
| Nominal cold resistance |  |  | 0.06 |  | Ohms | Measured at less than 10% of rated current at 25°C | 1 |
| Nominal melting I2t | I2t |  | 1.408 |  | A2sec | 8 msec opening time | 1 |

## CAD (KiCad official)

- Symbol: `045802.5DR`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `045802-5dr-etched.step` / `045802-5dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `045802-5dr.step` / `045802-5dr.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/8588903733992701952) (3 pp, sha256 `4e4a9ebaffcd9cc5`, retrieved 2026-10-18, 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/045802-5dr-datasheet.pdf)