# 0603L150SLYR

**Littelfuse** · Resettable Fuses · 0603

0603L150SLYR 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 | One terminal of the series PPTC element (solder-plated copper end termination), rated Ihold 1.50 A, Itrip 3.00 A, Vmax 6 Vdc and Imax 50 A; the device is not polarized. |
| 2 | 2 | passive | Other terminal of the series PPTC element (solder-plated copper end termination), rated Ihold 1.50 A, Itrip 3.00 A, Vmax 6 Vdc and Imax 50 A; the device is not polarized. |

## 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 |
|---|---|---|---|---|---|---|---|
| Hold current | I hold |  |  | 1.5 | A | Maximum current device will pass without tripping, 20°C still air (datasheet definition) | 2 |
| Trip current | I trip | 3 |  |  | A | Minimum current at which device will trip, 20°C still air (datasheet definition) | 2 |
| Maximum voltage | Vmax |  |  | 6 | Vdc | Maximum voltage device can withstand without damage at rated current (Imax) | 2 |
| Maximum fault current | Imax |  |  | 50 | A | Maximum fault current device can withstand without damage at rated voltage (Vmax) | 2 |
| Power dissipated in tripped state | Pd |  | 0.6 |  | W | Tripped state at 20°C still air (datasheet definition) | 2 |
| Maximum time-to-trip |  |  |  | 0.5 | s | At 8.00 A | 2 |
| Minimum resistance (initial, un-soldered) | R min | 0.007 |  |  | Ω | Initial un-soldered state (datasheet definition) | 2 |
| Maximum resistance at 20°C | R 1max |  |  | 0.08 | Ω | 20°C, measured one hour after tripping or reflow soldering of 260°C for 20 sec (datasheet definition) | 2 |
| Operating temperature |  | -40 |  | 85 | °C | Environmental specifications | 4 |
| Maximum device surface temperature in tripped state |  |  |  | 125 | °C | In tripped state | 4 |

## 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 | Copper |  | Terminal Material Solder-Plated Copper | 4 |

## CAD (KiCad official)

- Symbol: `0603L150SLYR`
- Footprint: `Fuse:Fuse_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `0603l150slyr-etched.step` / `0603l150slyr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `0603l150slyr.step` / `0603l150slyr.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/8588905170461184000) (7 pp, sha256 `4299de209bcfb317`, retrieved 2026-10-18, 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/0603l150slyr-datasheet.pdf)