# Switchcraft Switchcraft \#12B

Canonical page: https://guitarwiring.app/catalog/switchcraft-12b-stereo-jack

The ring contact closes the battery negative to ground only while a mono plug is inserted, so active pickups switch off when unplugged.

Category: [Jacks, Shielding & Ground](<https://guitarwiring.app/catalog/category/jacks-shielding-ground/index.md>)

Manufacturer: [Switchcraft](<https://guitarwiring.app/catalog/manufacturer/switchcraft/index.md>)

Type: Output jack

## Specifications

- Connector: Trs stereo
- Contact Count: 3
- Is Switching: Yes
- Is Multi Contact: No

## Terminals

- tip: Tip (signal); role: Jack tip; lead colour: not specified.
- sleeve: Sleeve (ground); role: Jack sleeve; lead colour: not specified; ground by default.
- ring: Ring (battery switch); role: Jack ring; lead colour: not specified.

## Internal connections

No internal connections listed.

## Source references

No source references listed.

## Retailer references

No retailer references listed.

This catalog is a reference, not a retailer. Illustrations are schematic. Confirm the exact component revision and manufacturer specifications before purchase or soldering.

## Use this component

[Add to my parts](<https://app.guitarwiring.app/inventory/add/switchcraft-12b-stereo-jack>). Opens the app; sign-in, Pro access and explicit confirmation are required before anything is saved. Visiting this link does not add a part.