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  1. Parts
  2. /Connectors & cables
  3. /Connectors

2-pin 3.81mm Terminal Block

OverviewPinoutAlternatesRelated groups
2-pin 3.81mm Terminal Block — WJ124-3.81-02P-14-00A

Two-position 3.81mm pitch screw terminal block for detachable wire connections.

Pinout

  • Terminal 1

    First wire connection.

  • Terminal 2

    Second wire connection.

PinPositionTypeFunctionVoltage
Terminal 1First wire connection.
Terminal 2Second wire connection.

Connectors

27 other options

Sort passive connector adapters from Qwiic boards, LCD modules and microSD card adapters before assuming anything with the right plug will substitute safely.

Compare
  • SparkFun Qwiic Pro Micro BoogieBoard visual preview

    SparkFun Qwiic Pro Micro BoogieBoard

    Qwiic-connected ATmega32U4 development board variant. It belongs near Qwiic/dev-board comparisons, not passive connector swaps.

    $19.95
  • 9V to Barrel Jack Adapter visual preview

    9V to Barrel Jack Adapter

    Passive 9 V battery to 5.5 × 2.1 mm center-positive barrel adapter. Check that the target board accepts 9 V barrel input.

    $1.50
  • SparkFun 16x2 SerLCD - RGB Backlight (Qwiic) visual preview

    SparkFun 16x2 SerLCD - RGB Backlight (Qwiic)

    Serial/Qwiic LCD module. Qwiic connector helps wiring, but the part is a display module with firmware and address assumptions.

    $32.50
  • MicroUSB Plug to 5.5/2.1mm DC Barrel Jack Adapter | Kiwi Electronics visual preview

    MicroUSB Plug to 5.5/2.1mm DC Barrel Jack Adapter | Kiwi Electronics

    Passive MicroUSB to 5.5 × 2.1 mm barrel adapter. Connector conversion only, not voltage conversion or regulation.

  • Micro SD Card Adapter for Raspberry & Macbooks - Black visual preview

    Micro SD Card Adapter for Raspberry & Macbooks - Black

    Physical microSD card adapter for Raspberry Pi and MacBook-style slots. Compare fit and card support, not power or I²C details.

  • Micro SD Card Adapter for Raspberry & Macbooks - Blue visual preview

    Micro SD Card Adapter for Raspberry & Macbooks - Blue

    Same microSD adapter class as the black Seeed listing, with color/variant differences rather than a different electronic role.

  • 2.5mm 4-Pole TRRS Audio Jack Terminal Block visual preview

    2.5mm 4-Pole TRRS Audio Jack Terminal Block

    $2.95
  • 2.5mm 4-Pole TRRS Audio Plug Terminal Block visual preview

    2.5mm 4-Pole TRRS Audio Plug Terminal Block

    $2.95
  • Adafruit 12-Channel 16-bit PWM LED Driver - SPI Interface [TLC59711] visual preview

    Adafruit 12-Channel 16-bit PWM LED Driver - SPI Interface [TLC59711]

  • Adafruit CH334F Mini 2-Port USB Hub Breakout visual preview

    Adafruit CH334F Mini 2-Port USB Hub Breakout

    $4.50
  • Adafruit CH9328 UART to HID Keyboard Breakout visual preview

    Adafruit CH9328 UART to HID Keyboard Breakout

    $6.95
  • Adafruit FPC Breakout for Raspberry Pi 5 DSI or RP2350 HSTX visual preview

    Adafruit FPC Breakout for Raspberry Pi 5 DSI or RP2350 HSTX

    $2.50
  • Adafruit Qwiic / STEMMA QT 5 Port Hub visual preview

    Adafruit Qwiic / STEMMA QT 5 Port Hub

    $2.50
  • Adafruit Qwiic / STEMMA QT Breakout Board visual preview

    Adafruit Qwiic / STEMMA QT Breakout Board

    $1.95
  • Adafruit Reversible USB Type A Plug Connector Breakout visual preview

    Adafruit Reversible USB Type A Plug Connector Breakout

    $2.50
  • Adafruit Sewable USB Type C Power Jack Connector visual preview

    Adafruit Sewable USB Type C Power Jack Connector

    $2.50
  • Adafruit Sunken USB Type C Breakout Board - Downstream Connection visual preview

    Adafruit Sunken USB Type C Breakout Board - Downstream Connection

    $2.95
  • Adafruit Switchable USB Type A to C Breakout Board visual preview

    Adafruit Switchable USB Type A to C Breakout Board

    $5.95
  • Adafruit TRRS Jack Breakout Board visual preview

    Adafruit TRRS Jack Breakout Board

    $1.75
  • Adafruit USB Type C Breakout Board, Downstream Connection visual preview

    Adafruit USB Type C Breakout Board, Downstream Connection

    $2.95
  • Adafruit USB Type C CC Resistor Fixer visual preview

    Adafruit USB Type C CC Resistor Fixer

    $4.50
  • Adafruit USB Type C Vertical Breakout - Downstream Connection visual preview

    Adafruit USB Type C Vertical Breakout - Downstream Connection

    $2.95
  • BNC Male Plug Terminal Block visual preview

    BNC Male Plug Terminal Block

    $0.95
  • FTDI Serial TTL-232 USB Type C Cable visual preview

    FTDI Serial TTL-232 USB Type C Cable

    $19.95
  • JST SH Compatible 1mm Pitch 3-pin Plug-Plug Cable, 200mm visual preview

    JST SH Compatible 1mm Pitch 3-pin Plug-Plug Cable, 200mm

    $1.75
  • Snap-In Panel Mount Cable - USB-A Socket to 4 Wires visual preview

    Snap-In Panel Mount Cable - USB-A Socket to 4 Wires

    $2.50
  • USB Micro-B Breakout Board visual preview

    USB Micro-B Breakout Board

Related groups

4 groups
Raspberry Pi Micro USB to USB-C Adapter - Black visual preview
SparkFun Qwiic Pro Micro - USB-C visual preview
SparkFun USB Micro-B Plug Breakout visual preview
USB cable - USB A to Micro-B visual preview

USB and serial

Separate passive USB leads, connector adapters, breakout boards, USB-UART bridges and USB-C development boards before treating one as a replacement for another.

Connectors & cables · USB cables · 9 parts

RGB backlight positive LCD 16x2 visual preview
SparkFun 16x2 SerLCD - RGB Backlight (Qwiic) visual preview
I2C 20x4 Arduino LCD Display Module visual preview
Gravity: I2C 16x2 Arduino LCD with RGB Backlight Display V2.0 visual preview

Displays

Character LCDs, SPI TFTs, e-paper modules and larger capacitive-touch TFT panels solve different display jobs. Treat display class, interface, controller, resolution, touch, refresh behaviour, storage, voltage and mounting as separate swap checks.

Displays · TFT & LCD displays · 33 parts

MQ-2 Gas Sensor visual preview
MQ-3 Gas Sensor visual preview
MQ-135 Gas Sensor visual preview
Grove - Air quality sensor visual preview

Air quality

Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.

Sensors · Gas & air-quality sensors · 29 parts

Arduino Uno visual preview
Raspberry Pi Pico visual preview
Adafruit Feather nRF52840 Express visual preview
Pan-Tilt HAT kit visual preview

MCUs and boards

ESP32, Arduino Uno, Raspberry Pi Pico, and compatible add-on boards for running builds.

Boards · Microcontroller boards · 24 parts

Parts tray full · 5 max · remove a part to add another