# PTV09A-4020S-B503

**BOURNS** · Potentiometers, Variable Resistors · THT

PTV09A-4020S-B503 from BOURNS, in a THT. 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 | Terminal 1 | passive | Terminal 1 is one end of the carbon resistive element, and the datasheet defines the input voltage as measured between Terminal 1 and Terminal 3, with a maximum operating voltage of 20 VDC or 50 VAC and a power rating of 0.05 W for linear and audio tapers. |
| 2 | 2 | passive | Terminal 2 is the output (wiper) terminal, and the taper graphs plot the output voltage measured between Terminal 1 and Terminal 2 against rotational travel. |
| 3 | 3 | passive | Terminal 3 is the other end of the resistive element, forming the input reference with Terminal 1 in the Terminal 1-3 input voltage definition, with a maximum operating voltage of 20 VDC or 50 VAC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | THT |
| 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 |
|---|---|---|---|---|---|---|---|
| Residual Resistance |  |  |  | 500 | ohms | Printed as 500 ohms or ±1 % max. | 1 |
| Residual Resistance |  |  |  | 1 | % | Alternative to 500 ohms, as printed | 1 |
| Maximum Operating Voltage (Linear and Audio) |  |  |  | 20 | VDC | Linear and Audio | 1 |
| Maximum Operating Voltage (Linear and Audio) |  |  |  | 50 | VAC | Linear and Audio | 1 |
| Sliding Noise |  |  |  | 100 | mV |  | 1 |
| Operating Temperature |  | -10 |  | 50 | °C |  | 1 |
| Rotational Torque |  | 10 |  | 100 | g-cm |  | 1 |
| Stop Strength |  | 2 |  |  | kg-cm |  | 1 |
| Standard Resistance Tolerance |  | -20 |  | 20 | % | Standard resistance tolerance | 1 |
| Nominal Resistance | R |  | 50000 |  | ohms | Resistance code 503 per How To Order (B503 suffix) | 1 |
| Rotational Life |  |  | 10000 |  | cycles |  | 1 |

## CAD (KiCad official)

- Symbol: `PTV09A-4020S-B503`
- Footprint: `Adom_Gen:Bourns_PTV09_4df4a4`
- 3D model: THT (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [BOURNS datasheet](https://www.bourns.com/docs/product-datasheets/PTV09.pdf) (5 pp, sha256 `411cdb6a62e61f9c`, retrieved 2026-11-05, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/ptv09a-4020s-b503-datasheet.pdf)