# MF0S4FF2200A50

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

MF0S4FF2200A50 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (code F = ±1%) |  | -1 |  | 1 | % |  | 3 |
| Temperature coefficient (code F = 50 ppm) |  | -50 |  | 50 | ppm/°C | t1 +25°C or specified room temperature; t2 -55℃ or 125℃ | 5 |
| Max working voltage (RCWV) |  |  |  | 200 | V |  | 4 |
| Max overload voltage |  |  |  | 400 | V |  | 4 |
| Dielectric withstanding voltage |  |  |  | 400 | V | AC test, 60-70 s, clamped in 90° V-block (method 4.7) | 4 |
| Short-time overload ΔR/R | ΔR/R | -0.5 |  | 0.5 | % | Plus ±0.05 Ω; 2.5 times RCWV or Max. Overload Voltage whichever less, 5 s | 6 |
| Pulse overload ΔR/R | ΔR/R | -1 |  | 1 | % | Plus 0.05 Ω; 10,000 cycles, 1 s ON / 25 s OFF, at 4 times RCWV or Max. Overload whichever less | 6 |
| Resistance to soldering heat ΔR/R | ΔR/R | -1 |  | 1 | % | Plus 0.05 Ω; leads immersed 2.0-2.5 mm from body in 260℃±5℃ solder for 10±1 s | 6 |
| Rapid change of temperature ΔR/R | ΔR/R | -1 |  | 1 | % | Plus 0.05 Ω; 30 min at -55 °C and 30 min at 155 °C; 100 cycles | 6 |
| Load life in humidity ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 1,000 h, 1.5 h ON / 0.5 h OFF, RCWV or Max. Working Voltage whichever less, 40℃±2℃, 90 to 95% RH | 6 |
| Load life ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 1,000 h at RCWV or Max. Working Voltage whichever less, duty 1.5 h ON / 0.5 h OFF, 70℃±2℃ ambient | 6 |
| Low temperature storage ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | -55℃, for 2 H (IEC 60068-2-1 Aa) | 6 |
| High temperature exposure ΔR/R (normal type) | ΔR/R | -1.5 |  | 1.5 | % | 155℃, for 16 H (MIL-STD-202 108A) | 6 |
| Solderability coverage |  | 95 |  |  | % | Test temp of solder 245℃±3℃, dwell time 2~3 seconds | 6 |
| Ambient temperature range (power derating) |  | -55 |  | 155 | °C | Constant power from -55 to 70℃; derate to zero from 70 to 155℃ | 5 |

## 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: `MF0S4FF2200A50`
- 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/8756509697857855488) (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/mf0s4ff2200a50-datasheet.pdf)