# 043501.5KRHF

**Littelfuse** · Disposable Fuses · 0402

043501.5KRHF from Littelfuse, in a 0402. 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 | 0402 |
| 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 rating, at 25ºC, 0.250A-5A range; minimum | 1 |
| Insulation resistance after opening |  | 10000 |  |  | Ohms | After opening; printed as 'Greater than 10,000Ohms' | 3 |
| Opening time at 200% of ampere rating |  |  |  | 5 | secs. | 200% of rating, at 25ºC, 0.375A-5A range; maximum | 1 |
| Opening time at 300% of ampere rating |  |  |  | 0.2 | sec. | 300% of rating, at 25ºC, 0.375A-5A range; maximum | 1 |
| Max voltage rating |  |  |  | 32 | V | 1.5A (amp code 01.5) row | 1 |
| Interrupting rating |  |  |  | 35 | A | @32VDC; measured at rated voltage | 1 |
| Operating temperature |  | -55 |  | 90 | ºC | Consult temperature re-rating curve; contact Littelfuse above 90ºC | 3 |
| Nominal cold resistance |  |  | 0.04701 |  | Ohms | Measured at 10% of rated current, 25ºC | 1 |
| Nominal melting I2t | I2t |  | 0.056 |  | A2sec |  | 1 |
| Nominal voltage drop |  |  | 86.7 |  | mV |  | 1 |
| Nominal power dissipation |  |  | 0.13005 |  | W |  | 1 |

## CAD (KiCad official)

- Symbol: `043501.5KRHF`
- Footprint: `Fuse:Fuse_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `043501-5krhf-etched.step` / `043501-5krhf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `043501-5krhf.step` / `043501-5krhf.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/8588910069891411968) (3 pp, sha256 `681e3229f7e6bf9b`, 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/043501-5krhf-datasheet.pdf)