# Jumper 2.54mm , Black

> Jumper cap (shunt) with 2.54mm pitch, black color, plastic housing, 2 positions/pins. Fits onto standard pin header connectors to electrically connect two adjacent pins. Used for selecting operating voltage, enabling pull-up resistors, setting I2C address or microstepping mode on drivers such as A4988 or DRV8825. Compatible with standard 2.54mm header connectors found on boards like Arduino, ESP32, STM32 or Raspberry Pi Pico.

- Page: https://sigmanortec.ro/en/jumper-254mm-black
- Price: 0.19 RON
- Availability: In stock; 1-2 zile
- Reference: 33371 · EAN: 5943855297834
- Category: Electronic components > Connectors and Cables > Pin Headers
- Package (shipping data): 0.005 kg
- Updated: 2026-10-10
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:39 (Europe/Bucharest)

## Description

Ideal for quick configuration of electronic boards and modules, this jumper allows easy selection of working modes or activation of functions on standard pins. It mounts on a 2.54mm pitch header, offers stable contact, has a compact and resistant housing, black color for discreet identification in assemblies.
The jumper cap, also known as a shunt or shorting cap, is a simple and indispensable accessory in electronics, used to electrically connect two adjacent pins of a standard-pitch header connector with a 2.54mm pitch. The body is made of black plastic, and inside there is a metal contact that makes the connection between the two pins when the cap is inserted onto the connector. As a passive component, it does not require power or software configuration, and installation and removal are done manually, without special tools.
This type of jumper is widely used for quick hardware configurations, such as selecting the operating voltage on modules (3.3V or 5V), enabling termination or pull-up resistors, selecting the I2C address, choosing the microstepping mode on A4988 or DRV8825 stepper motor drivers, enabling programming mode on various boards, and selecting the power source. It is commonly found on motherboards, hard drives, 3D printers, development modules, and various industrial equipment.
Because the 2.54mm pitch is the most widely used standard in electronics, the jumper cap is compatible with most common boards and modules, including Arduino UNO, Nano, Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico, and other platforms that use standard header connectors. It is recommended to purchase several pieces, as they are small parts that are easy to lose, and in many projects they are needed simultaneously in multiple positions.
Specifications:
Pin spacing: 2.54mm
Number of positions: 2 pins
Color: Black
Body material: Plastic
Type: Jumper cap (shunt) for header connectors
Voltage and current: Not specified