component
0603L025YR
Public Made by Adomby adom
Littelfuse Resettable Fuses, 0603. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdown0603L025YR
Littelfuse · Resettable Fuses · 0603
0603L025YR 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 of two interchangeable, non-polarized solder-plated copper terminals of the 0603L025 PTC (Ihold 0.25 A, Itrip 0.55 A, Vmax 9 Vdc, Imax 40 A). |
| 2 | 2 | passive | Second interchangeable, non-polarized solder-plated copper terminal of the 0603L025 PTC, in series with the protected circuit (Ihold 0.25 A, Vmax 9 Vdc). |
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 |
|---|---|---|---|---|---|---|---|
| Minimum resistance (initial, un-soldered) | R min | 0.5 | Ω | Initial (un-soldered) state | 1 | ||
| Maximum resistance at 20°C after trip or reflow | R1max | 3 | Ω | 20°C, measured one hour after tripping or reflow soldering at 260°C for 20 sec | 1 | ||
| Hold current | I hold | 0.25 | A | 20°C still air; maximum current device will pass without tripping | 1 | ||
| Trip current | I trip | 0.55 | A | 20°C still air; minimum current at which the device will trip | 1 | ||
| Maximum voltage | V max | 9 | Vdc | At rated current (I max) | 1 | ||
| Maximum fault current | I max | 40 | A | At rated voltage (Vmax) | 1 | ||
| Power dissipated in tripped state | P d | 0.5 | W | Tripped state, 20°C still air | 1 | ||
| Maximum time to trip | 0.08 | s | At 8.00 A | 1 | |||
| Operating/storage temperature | -40 | 85 | °C | Operating/storage | 3 | ||
| Maximum device surface temperature in tripped state | 125 | °C | Tripped state | 3 | |||
| Passive aging resistance change | -10 | 10 | % | +85°C, 1000 hours; typical resistance change | 3 | ||
| Humidity aging resistance change | -15 | 15 | % | +85°C, 85% R.H., 100 hours; typical resistance change | 3 | ||
| Thermal shock resistance change | -30 | % | MIL-STD-202 Method 107, +85°C/-40°C 20 times; typical resistance change | 3 | |||
| Peak classification temperature (reflow) | TP | 260 | °C | Pb-free reflow profile; printed tolerance +0/-5 °C | 3 |
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 | 3 |
CAD (KiCad official)
- Symbol:
0603L025YR - Footprint:
Fuse:Fuse_0603_1608Metric - 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files:
0603l025yr-etched.step/0603l025yr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);0603l025yr.step/0603l025yr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (5 pp, sha256
64bb6c9d39cb226b, retrieved 2026-10-16, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).