# 0470.500DRSNP

**Littelfuse** · Disposable Fuses · 1206

0470.500DRSNP 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 | One fuse terminal (Cu/Ni/Sn); 0.500A fast-acting, 125V rated, nominal cold resistance 0.5455 ohm, interrupting rating 50A @ 125VAC/VDC; the fuse is non-polarized and terminals are interchangeable. |
| 2 | 2 | passive | Other fuse terminal (Cu/Ni/Sn); 0.500A fast-acting, 125V rated, nominal cold resistance 0.5455 ohm, interrupting rating 50A @ 125VAC/VDC; the fuse is non-polarized and terminals are interchangeable. |

## 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 200% of ampere rating |  |  |  | 5 | seconds | 200% of ampere rating | 1 |
| Insulation resistance (after opening) |  | 0.1 |  |  | Mohm | After opening, IEC 60127-4 | 3 |
| Operating temperature |  | -55 |  | 125 | ºC |  | 3 |
| Max voltage rating |  |  |  | 125 | V |  | 1 |
| Do not exceed (reflow soldering) |  |  |  | 260 | °C | Reflow soldering | 2 |
| Pre-heat temperature Ts(min) | Ts(min) | 150 |  |  | °C | Pb-free reflow pre-heat | 2 |
| Pre-heat temperature Ts(max) | Ts(max) |  |  | 200 | °C | Pb-free reflow pre-heat | 2 |
| Pre-heat time (ts) min to max | ts | 60 |  | 180 | seconds | Pb-free reflow pre-heat, Ts(min) to Ts(max) | 2 |
| Average ramp-up rate (TL to peak) |  |  |  | 5 | °C/second | Liquidus temp (TL) to peak | 2 |
| Ramp-up rate TS(max) to TL |  |  |  | 5 | °C/second | TS(max) to TL | 2 |
| Time at liquidus (tL) | tL | 60 |  | 90 | seconds | Reflow, above TL | 2 |
| Peak temperature (TP) | TP | -5 | 250 | 0 | °C | Pb-free reflow peak, printed as +0/-5 °C | 2 |
| Time within 5°C of actual peak temperature (tp) | tp | 20 |  | 40 | seconds | Within 5°C of actual peak | 2 |
| Ramp-down rate |  |  |  | 5 | °C/second | Reflow ramp-down | 2 |
| Time 25°C to peak temperature |  |  |  | 8 | minutes | 25°C to peak temperature (TP) | 2 |
| Ampere rating |  |  | 0.5 |  | A | Amp code .500 (0.500 A) | 1 |
| Nominal cold resistance |  |  | 0.5455 |  | Ohms | Nominal cold resistance, 0.500 A rating | 1 |
| Nominal melting I2t | I2t |  | 0.02874 |  | A2 sec. | 8 msec opening time | 1 |

## CAD (KiCad official)

- Symbol: `0470.500DRSNP`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `0470-500drsnp-etched.step` / `0470-500drsnp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `0470-500drsnp.step` / `0470-500drsnp.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/8603307848201875456) (3 pp, sha256 `bf425e6cecbf0370`, 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/0470-500drsnp-datasheet.pdf)