How to Use JST XH 2P Female: Examples, Pinouts, and Specs

The JST XH 2P Female connector is a 2-pin female connector widely used in electronic circuits for connecting wires. It features a compact design and a reliable locking mechanism, ensuring secure and stable connections. This connector is part of the JST XH series, known for its durability and ease of use. It is commonly used in battery connections, PCB interfaces, and small electronic devices.

• Battery connections in RC models, drones, and small electronics
• Power supply connections for PCBs
• Signal transmission in low-power circuits
• Interfacing sensors and modules with microcontrollers

The JST XH 2P Female connector is designed to meet the needs of compact and reliable wire-to-board or wire-to-wire connections. Below are its key technical details:

1. Wire Preparation: Strip the insulation from the ends of the wires you want to connect, exposing approximately 2-3 mm of the conductor.
2. Crimping: Use a crimping tool to attach the crimp terminals to the exposed wire ends. Ensure a secure and firm crimp for reliable connections.
3. Insert into Housing: Insert the crimped terminals into the JST XH 2P Female housing until they click into place. The locking mechanism ensures the terminals are securely held.
4. Mating with Male Connector: Align the JST XH 2P Female connector with the corresponding male connector and push them together until the locking mechanism engages.

• Wire Gauge: Use wires with an appropriate gauge (typically 22-28 AWG) to ensure compatibility with the crimp terminals.
• Crimping Tool: Always use a proper crimping tool designed for JST XH connectors to avoid loose or unreliable connections.
• Polarity: Double-check the polarity of the connections to prevent damage to your circuit.
• Insertion Force: Avoid applying excessive force when inserting or removing the connector to prevent damage to the housing or terminals.

The JST XH 2P Female connector can be used to connect a 2-pin sensor or power supply to an Arduino UNO. Below is an example of connecting a 2-pin temperature sensor:

• Connect the positive terminal of the JST XH 2P Female connector to the Arduino's 5V pin.
• Connect the negative terminal to the Arduino's GND pin.

// Example code for reading a temperature sensor connected via JST XH 2P Female
// Assumes the sensor outputs an analog voltage proportional to temperature

const int sensorPin = A0; // Analog pin connected to the sensor's output

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
  float voltage = sensorValue * (5.0 / 1023.0); // Convert to voltage (5V reference)
  float temperature = (voltage - 0.5) * 100.0; // Convert voltage to temperature (example formula)
  
  // Print the temperature to the Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");
  
  delay(1000); // Wait 1 second before the next reading
}

1. Loose Connections:

   • Issue: The connector feels loose or disconnects easily.
   • Solution: Ensure the crimp terminals are properly inserted into the housing and the locking mechanism is engaged.

2. Incorrect Polarity:

   • Issue: The circuit does not work or components are damaged.
   • Solution: Double-check the polarity of the connections before powering the circuit.

3. Crimping Problems:

   • Issue: Wires are not securely attached to the crimp terminals.
   • Solution: Use a high-quality crimping tool and ensure the wire gauge matches the terminal specifications.

4. Connector Damage:

   • Issue: The housing or terminals are damaged during use.
   • Solution: Avoid applying excessive force and ensure proper alignment when mating connectors.

Q1: Can I solder wires directly to the JST XH 2P Female connector?
A1: It is not recommended to solder wires directly to the connector, as it may damage the housing or compromise the connection. Use crimp terminals for a secure and reliable connection.

Q2: What is the maximum current the JST XH 2P Female connector can handle?
A2: The connector is rated for a maximum current of 3 A. Exceeding this limit may cause overheating or damage.

Q3: Can I use this connector for high-frequency signals?
A3: The JST XH 2P Female connector is primarily designed for low-power and low-frequency applications. For high-frequency signals, consider using connectors specifically designed for such purposes.

Q4: Is the connector waterproof?
A4: No, the JST XH 2P Female connector is not waterproof. For outdoor or moisture-prone environments, use waterproof connectors or additional sealing methods.