# MF0S4FF1501A50

**UNI ROYAL Uniroyal Elec** · Through Hole Resistors · R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal

MF0S4FF1501A50 from UNI ROYAL Uniroyal Elec, in a R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_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_DIN0204_L3.6mm_D1.6mm_P7.62mm_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 |
|---|---|---|---|---|---|---|---|
| Max working voltage |  |  |  | 200 | V | MF 1/4WS (small size 1/4W); DC or RMS AC continuous working voltage | 4 |
| Max overload voltage |  |  |  | 400 | V | MF 1/4WS; overload = 2.5 x RCWV or this value, whichever is lower | 4 |
| Dielectric withstanding voltage |  |  |  | 400 | V | MF 1/4WS; AC test for 60-70 s | 4 |
| Resistance tolerance (6th digit F = ±1%) |  | -1 |  | 1 | % | Standard resistance tolerance code F | 2 |
| Temperature coefficient (7th digit F = 50 PPM) |  | -50 |  | 50 | PPM/℃ | Standard range, ±1% tolerance, 10Ω~1MΩ | 5 |
| Operating temperature range (power derating) |  | -55 |  | 155 | ℃ | Ambient; full rated power from -55 to 70℃, derates to zero from 70 to 155℃ | 5 |
| Short-time overload ΔR/R | ΔR/R | -0.5 |  | 0.5 | % | 2.5 x RCWV or max overload voltage, whichever lower, 5 s; printed as ±(0.5%+0.05 Ω) | 6 |
| Pulse overload ΔR/R | ΔR/R | -1 |  | 1 | % | 10,000 cycles (1 s ON, 25 s OFF) at 4 x RCWV or max overload, whichever less; printed as ±(1%+0.05) | 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 | % | -55℃ 30 min and 155℃ 30 min, 100 cycles; printed as ±(1%+0.05 Ω) | 6 |
| Load life in humidity ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 40℃±2℃, 90-95% RH, 1,000 h, 1.5 h ON/0.5 h OFF, RCWV or max working voltage whichever less | 6 |
| Load life ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 70℃±2℃ ambient, 1,000 h, 1.5 h ON/0.5 h OFF, RCWV or max working voltage whichever less | 6 |
| Low temperature storage ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | -55℃, 2 h | 6 |
| High temperature exposure ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 155℃, 16 h | 6 |
| Recommended storage temperature |  | 15 |  | 35 | ℃ | Recommended warehouse storage | 8 |
| Recommended storage humidity |  | 25 |  | 75 | %RH | Recommended warehouse storage | 8 |

## 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: `MF0S4FF1501A50`
- Footprint: `Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal`
- 3D model: R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_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/8756509453573066752) (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/mf0s4ff1501a50-datasheet.pdf)