# TPAL0220F7R50K9

**RESI** · Through Hole Resistors · TO-220

TPAL0220F7R50K9 from RESI, in a TO-220. 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 | Resistor terminal 1 (non-polarized, 0.5Ω to 10KΩ series, 35W with heatsink and flange at or below 25°C, 500V max working voltage). |
| 2 | 2 | passive | Resistor terminal 2 (non-polarized, 5.08mm lead pitch, 2000VAC isolation between terminals and flange). |
| 3 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RESI |
| Package | TO-220 |
| Category | Resistors |
| Pins | 3 |

## 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 | R | -1 |  | 1 | % |  | 9 |
| Temperature coefficient of resistance | TCR | -100 |  | 100 | ppm/℃ |  | 9 |
| Maximum working voltage |  |  |  | 500 | V |  | 9 |
| Rated power |  |  |  | 35 | W | with heatsink, flange ≤25℃ | 2 |
| Rated power |  |  |  | 2.25 | W | without heatsink | 2 |
| Insulation resistance |  | 10 |  |  | MΩ |  | 2 |
| Insulation voltage |  |  |  | 2000 | VAC |  | 2 |
| Inductance | L |  |  | 0.1 | μH |  | 2 |
| Operating temperature range |  | -55 |  | 150 | ℃ |  | 2 |
| Thermal resistance, junction to case | RTH(j-c) |  | 3 |  | ℃/W |  | 8 |
| Recommended mounting torque |  |  |  | 0.9 | N.m | heatsink mounting screw | 7 |
| Resistance change after test, entry 1 of performance table (test not aligned) | ΔR | -0.25 |  | 0.25 | % |  | 6 |
| Resistance change after test, entry 2 of performance table (test not aligned) | ΔR | -1 |  | 1 | % |  | 6 |
| Resistance change after test, entry 3 of performance table (test not aligned) | ΔR | -0.5 |  | 0.5 | % |  | 6 |
| Resistance change after test, entry 4 of performance table (test not aligned) | ΔR | -1 |  | 1 | % |  | 6 |
| Resistance change after test, entry 5 of performance table (test not aligned) | ΔR | -0.25 |  | 0.25 | % |  | 6 |
| Resistance change after test, entry 6 of performance table (test not aligned) | ΔR | -0.25 |  | 0.25 | % |  | 6 |
| Resistance change after test, entry 7 of performance table (test not aligned) | ΔR | -0.25 |  | 0.25 | % |  | 6 |
| Resistance change after test, entry 8 of performance table (test not aligned) | ΔR | -0.5 |  | 0.5 | % |  | 6 |
| Resistance change after test, entry 9 of performance table (test not aligned) | ΔR | -0.5 |  | 0.5 | % |  | 6 |
| Resistance change after test, entry 10 of performance table (test not aligned) | ΔR | -0.5 |  | 0.5 | % |  | 6 |
| Resistance change after terminal strength test | ΔR | -0.2 |  | 0.2 | % |  | 6 |
| Nominal resistance | R |  | 7.5 |  | Ω |  | 9 |

## CAD (KiCad official)

- Symbol: `TPAL0220F7R50K9`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `tpal0220f7r50k9-etched.step` / `tpal0220f7r50k9-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpal0220f7r50k9.step` / `tpal0220f7r50k9.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [RESI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603392754361638912) (11 pp, sha256 `479655884eed109f`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/tpal0220f7r50k9-datasheet.pdf)