How to Use JST XH 3R Male: Examples, Pinouts, and Specs

The JST XH 3R Male is a 3-pin male connector from the JST XH series, designed for secure and reliable wire-to-board or wire-to-wire connections in electronic circuits. This connector is widely used in applications requiring compact, durable, and efficient interconnections. Its robust design ensures a stable connection, making it ideal for use in consumer electronics, robotics, battery packs, and LED lighting systems.

• Battery connections in RC vehicles and drones
• Power delivery in LED lighting systems
• Signal and power connections in consumer electronics
• Interfacing sensors and modules in embedded systems

The JST XH 3R Male connector is designed to meet the needs of compact and reliable connections. Below are its key technical details:

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

The JST XH 3R Male connector is straightforward to use and can be integrated into a variety of circuits. Below are the steps and best practices for using this component:

1. Prepare the Wires: Strip the insulation from the wires to expose approximately 2-3 mm of the conductor.
2. Crimp the Contacts: 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 the Contacts: Push the crimped contacts into the connector housing until they click into place.
4. Connect to the Female Counterpart: Align the JST XH 3R Male connector with its female counterpart and gently push them together until they lock securely.

• Wire Gauge: Use wires with an appropriate gauge (typically 22-28 AWG) to ensure compatibility and reliable connections.
• Polarity: Double-check the pinout to avoid reversing the polarity, which could damage connected components.
• Secure Mounting: If the connector is used in a high-vibration environment, ensure it is securely mounted to prevent accidental disconnection.
• Avoid Overcurrent: Do not exceed the rated current of 3 A to prevent overheating or damage.

The JST XH 3R Male connector can be used to supply power or transmit signals to an Arduino UNO. Below is an example of connecting a sensor with a JST XH 3R Male connector to an Arduino UNO:

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

// Example code for reading a digital signal from a sensor connected via JST XH 3R

const int signalPin = 2; // Pin connected to the signal line of the JST XH 3R
int sensorValue = 0;     // Variable to store the sensor reading

void setup() {
  pinMode(signalPin, INPUT); // Set the signal pin as input
  Serial.begin(9600);        // Initialize serial communication
}

void loop() {
  sensorValue = digitalRead(signalPin); // Read the digital signal
  Serial.print("Sensor Value: ");       // Print the sensor value to the serial monitor
  Serial.println(sensorValue);
  delay(500); // Wait for 500 ms before the next reading
}

1. Loose Connections

   • Issue: The connector does not fit securely or disconnects easily.
   • Solution: Ensure the crimp terminals are properly inserted into the housing and that the male and female connectors are fully mated.

2. Incorrect Polarity

   • Issue: The connected device does not function or is damaged.
   • Solution: Verify the pinout and ensure the VCC and GND lines are correctly connected.

3. Overheating

   • Issue: The connector becomes hot during operation.
   • Solution: Check that the current does not exceed the rated 3 A. Use thicker wires if necessary.

4. Signal Interference

   • Issue: Data transmission is unreliable or noisy.
   • Solution: Use shielded cables for the signal line and ensure proper grounding.

Q1: Can the JST XH 3R Male connector handle high-frequency signals?
A1: Yes, it can handle high-frequency signals, but for very high-speed data, consider using shielded cables to minimize interference.

Q2: Is the JST XH 3R Male connector waterproof?
A2: No, the standard JST XH 3R Male connector is not waterproof. For outdoor or moisture-prone environments, use a waterproof connector.

Q3: Can I solder wires directly to the connector?
A3: While possible, it is not recommended. Use crimp terminals for a secure and reliable connection.

Q4: What tools are required for crimping?
A4: A dedicated JST crimping tool is recommended for precise and reliable crimps.