How to Use JST XH 3P Female: Examples, Pinouts, and Specs

The JST XH 3P Female connector is a 3-pin female connector from the JST XH series, designed for secure and reliable wire-to-board or wire-to-wire connections in electronic circuits. It is widely used in applications requiring compact, durable, and efficient connections, such as battery packs, sensors, and small electronic devices. Its standardized design ensures compatibility with corresponding male connectors and headers.

• Battery connections in RC models, drones, and robotics
• Sensor interfacing in embedded systems
• Power delivery in small electronic devices
• Signal transmission in PCBs and prototyping

The JST XH 3P Female connector is designed to meet the needs of low-power and signal applications. Below are its key specifications:

The JST XH 3P Female connector has three pins, typically used for power, ground, and signal connections. Below is the pinout:

1. Crimping Wires:

   • Use a crimping tool to attach wires to the connector's terminals. Ensure the wires are securely crimped to avoid loose connections.
   • Insert the crimped terminals into the connector housing until they click into place.

2. Connecting to a Male Header:

   • Align the JST XH 3P Female connector with the corresponding male header or connector.
   • Gently push the connector until it locks into place, ensuring a secure connection.

3. Soldering to a PCB (if applicable):

   • If using a male header on a PCB, solder the header pins to the board.
   • Connect the JST XH 3P Female connector to the header.

• Wire Gauge: Use wires with an appropriate gauge (typically 22-28 AWG) to ensure proper current handling and fit within the crimp terminals.
• Polarity: Double-check the pinout to avoid reversing the polarity, which could damage connected components.
• Insertion Force: Do not apply excessive force when connecting or disconnecting, as this may damage the connector or the mating header.

The JST XH 3P Female connector can be used to connect a sensor or module to an Arduino UNO. Below is an example of wiring and code for reading data from a sensor connected via the JST XH 3P Female connector.

• Pin 1 (VCC) → Arduino 5V
• Pin 2 (GND) → Arduino GND
• Pin 3 (Signal) → Arduino Analog Pin A0

// Example code for reading an analog sensor connected via JST XH 3P Female
const int sensorPin = A0; // Signal pin connected to Analog Pin A0

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud
  pinMode(sensorPin, INPUT); // Set the sensor pin as input
}

void loop() {
  int sensorValue = analogRead(sensorPin); // Read the analog value from the sensor
  Serial.print("Sensor Value: "); 
  Serial.println(sensorValue); // Print the sensor value to the Serial Monitor
  delay(500); // Wait for 500 milliseconds before the next reading
}

1. Loose Connections:

   • Cause: Improper crimping or incomplete insertion of terminals into the housing.
   • Solution: Re-crimp the wires and ensure the terminals are fully inserted into the housing.

2. Reversed Polarity:

   • Cause: Incorrect wiring of VCC and GND pins.
   • Solution: Verify the pinout and wiring before powering the circuit.

3. Intermittent Signal:

   • Cause: Poor contact between the female connector and the male header.
   • Solution: Ensure the connector is fully seated and check for bent or damaged pins.

Q1: Can the JST XH 3P Female connector handle high currents?
A1: No, the connector is rated for a maximum current of 3 A. For higher currents, consider using connectors with higher current ratings.

Q2: Is the JST XH 3P Female connector waterproof?
A2: No, the connector is not waterproof. For outdoor or moisture-prone applications, use a waterproof connector.

Q3: Can I reuse the connector after crimping?
A3: While it is possible to remove and reuse the housing, the crimp terminals are typically not reusable. It is recommended to use new terminals for reliable connections.

Q4: What tools are required for crimping?
A4: A dedicated JST crimping tool is recommended for precise and secure crimping of the terminals.

By following this documentation, you can effectively use the JST XH 3P Female connector in your electronic projects.