# Bourns PEC11 Rotary Encoder + Knob Kit

> Bourns PEC11-4215F-S24 12 mm mechanical rotary encoder with push switch (Adafruit 377, knob included): 24 detents / 24 pulses per turn, 2-bit quadrature A/B + common, momentary SPST push switch, 6 mm flatted metal shaft 15 mm long, M7 bushing panel mount, 1 mA @ 5 V contacts, 60 RPM max, −30 to +70 °C, 30 000-cycle life, 5 g. The classic menu / volume knob for robot UIs.

- Manufacturer: Bourns
- Part number: PEC11-4215F-S24
- Category: Encoders
- Canonical page: https://www.xirkit.io/products/bourns-pec11-rotary-encoder-plus-knob-kit-ae53
- Pinout: https://www.xirkit.io/products/bourns-pec11-rotary-encoder-plus-knob-kit-ae53/pinout
- Structured JSON: https://www.xirkit.io/products/bourns-pec11-rotary-encoder-plus-knob-kit-ae53/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Sensing | mechanical |
| Type | incremental |
| Resolution (PPR) | 24 PPR |
| Channels | A/B quadrature |
| Interface | quadrature |
| Output | mechanical contacts to common — add pull-ups |
| Index channel | no |
| Max speed | 60 rpm |
| Mounting | panel mount: M7×0.75 threaded bushing with washer and nut, plus two PCB tabs |
| Supply voltage | 5–5 V |
| Dimensions | 13.2 × 12.5 × 21.5 mm |
| Operating temperature | -30 to 70 °C |

## Pinout (5 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| A | 3-pin encoder row | signal a | — | a | — | — | — | — | — | — | — |
| C | 3-pin encoder row (middle) | ground | — | ground | — | — | — | — | — | — | — |
| B | 3-pin encoder row | signal b | — | b | — | — | — | — | — | — | — |
| SW1 | 2-pin switch row | other | — | sw1 | — | — | — | — | — | — | — |
| SW2 | 2-pin switch row | other | — | sw2 | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.adafruit.com | 4.5 USD | in_stock | 2026-10-01 | https://www.adafruit.com/product/377 |

## FAQ

**What voltage powers the Bourns PEC11 Rotary Encoder + Knob Kit?**

Supply range 5–5 V.

**How much does the Bourns PEC11 Rotary Encoder + Knob Kit cost?**

From $4.5 at www.adafruit.com. Prices are observed unit prices before tax and shipping.

**What are the Bourns PEC11 Rotary Encoder + Knob Kit dimensions?**

13.2 × 12.5 × 21.5 mm. A STEP model is available for enclosure fit checks.

**Where does this Bourns PEC11 Rotary Encoder + Knob Kit data come from?**

Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [Bourns PEC11 Rotary Encoder + Knob Kit datasheet](https://cdn-shop.adafruit.com/datasheets/pec11.pdf)
- [www.adafruit.com listing](https://www.adafruit.com/product/377)