# MF0W4FF1601A50

**UNI ROYAL Uniroyal Elec** · Through Hole Resistors · R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal

MF0W4FF1601A50 from UNI ROYAL Uniroyal Elec, in a R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal. 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 resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UNI ROYAL Uniroyal Elec |
| Package | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal |
| Category | Resistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (code F = ±1%) |  | -1 |  | 1 | % | MPN 6th digit F = ±1% (Part No. system) | 2 |
| Temperature coefficient (code F = 50 PPM) | TCR | -50 |  | 50 | ppm/°C | MF 1/4W, ±1% standard tolerance, 10Ω~1MΩ range | 5 |
| Max working voltage (MF 1/4W) |  |  |  | 250 | V | MF 1/4W normal size; rated continuous working voltage | 4 |
| Max overload voltage (MF 1/4W) |  |  |  | 500 | V | MF 1/4W normal size | 4 |
| Dielectric withstanding voltage (MF 1/4W) |  |  |  | 500 | V | MF 1/4W normal size; AC test for 60-70 s | 4 |
| Short-time overload ΔR/R | ΔR/R | -0.5 |  | 0.5 | % | 2.5 times RCWV or max overload voltage (whichever lower) for 5 s; printed as ±(0.5%+0.05 Ω) | 6 |
| Pulse overload ΔR/R | ΔR/R | -1 |  | 1 | % | 4 times RCWV, 10,000 cycles (1 s ON, 25 s OFF); printed as ±(1%+0.05), additive term unit not printed | 6 |
| Resistance to soldering heat ΔR/R | ΔR/R | -1 |  | 1 | % | 260±5℃ solder, 10±1 s; printed as ±(1%+0.05 Ω) | 6 |
| Rapid change of temperature ΔR/R | ΔR/R | -1 |  | 1 | % | 30 min at -55℃ and 30 min at 155℃, 100 cycles; printed as ±(1%+0.05 Ω) | 6 |
| Load life in humidity ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 1,000 h, 40℃±2℃, 90-95% RH, RCWV 1.5 h ON / 0.5 h OFF; standard (non-flame-retardant) type | 6 |
| Load life ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 1,000 h at RCWV, 1.5 h ON / 0.5 h OFF, 70℃±2℃ ambient; standard type | 6 |
| Low temperature storage ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | -55℃ for 2 h, IEC 60068-2-1 (Aa); standard type | 6 |
| High temperature exposure ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 155℃ for 16 h, MIL-STD-202 108A; standard type | 6 |
| Solderability coverage |  | 95 |  |  | % | Solder at 245±3℃, dwell 2-3 s; coverage must be over 95% | 6 |
| Operating (ambient) temperature range |  | -55 |  | 155 | °C | Ambient; power constant to 70℃ and derated to zero from 70 to 155℃ | 5 |
| Recommended storage temperature |  | 15 |  | 35 | °C | Recommended warehouse storage | 8 |
| Recommended storage humidity |  | 25 |  | 75 | %RH | Recommended warehouse storage | 8 |
| Rated power (designation 1/4W, normal size) | P |  | 0.25 |  | W | Printed as 1/4W, normal size MF 1/4W | 4 |
| Nominal resistance (decoded from MPN) | R |  | 1.6 |  | kΩ | MPN digits 8-11 = 160 x 10^1 Ω (E-96 series) | 2 |

## 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 | tin | 4 Lead Wire Tin solder coated copper wire | 5 |

## CAD (KiCad official)

- Symbol: `MF0W4FF1601A50`
- Footprint: `Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal`
- 3D model: R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal (KiCad packages3D, STEP)

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [UNI ROYAL Uniroyal Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756509038408544256) (8 pp, sha256 `58cca3f1fd846c5b`, retrieved 2026-11-06, 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/mf0w4ff1601a50-datasheet.pdf)