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

The JST Female 2P connector is a 2-pin female connector designed for secure and reliable electrical connections in electronic circuits. It is widely used in applications requiring compact, durable, and easy-to-use connectors. The connector typically features a locking mechanism that ensures a firm connection, preventing accidental disconnection during operation. Its small size and robust design make it ideal for use in battery connections, LED strips, RC vehicles, and other low-power electronic devices.

• Battery connections in small electronic devices
• LED strip wiring
• Remote-controlled (RC) vehicles and drones
• Low-power motor connections
• Prototyping and DIY electronics projects

The following table outlines the key technical details of the JST Female 2P connector:

The JST Female 2P connector has two pins, typically used for power and ground connections. The pin configuration is as follows:

1. Prepare the Wires: Strip the insulation from the ends of the wires you intend to connect, ensuring the exposed length matches the connector's crimp terminals.
2. Crimp the Terminals: Use a crimping tool to attach the metal terminals to the stripped wire ends. Ensure a secure and firm crimp for reliable conductivity.
3. Insert the Terminals: Push the crimped terminals into the connector housing until they click into place. The locking mechanism will secure the terminals.
4. Connect to the Male Counterpart: Align the JST Female 2P connector with its male counterpart and push them together until the locking mechanism engages.
5. Verify the Connection: Gently tug on the wires to ensure the connection is secure and will not disconnect accidentally.

• Wire Gauge: Use wires within the supported range (22-28 AWG) to ensure proper fit and electrical performance.
• Crimping Tool: Always use a compatible crimping tool for the terminals to avoid loose or unreliable connections.
• Polarity: Double-check the polarity of the connections (positive and negative terminals) to prevent damage to your circuit.
• Locking Mechanism: Ensure the locking mechanism is engaged to prevent accidental disconnection during operation.
• Current and Voltage Ratings: Do not exceed the specified current (3A) and voltage (250V) ratings to avoid overheating or damage.

The JST Female 2P connector can be used to power an Arduino UNO from a battery pack. Below is an example of how to connect a 7.4V LiPo battery to the Arduino UNO using the JST Female 2P connector.

• Pin 1 (Positive): Connect to the Arduino's VIN pin.
• Pin 2 (Negative): Connect to the Arduino's GND pin.

// Example code to blink an LED connected to pin 13 on the Arduino UNO
// Ensure the Arduino is powered via the JST Female 2P connector

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. Loose Connection

   • Issue: The connector feels loose or disconnects easily.
   • Solution: Ensure the crimped terminals are fully 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. Overheating

   • Issue: The connector or wires become hot during operation.
   • Solution: Verify that the current and voltage do not exceed the connector's ratings. Use thicker wires if necessary.

4. Crimping Issues

   • Issue: The wires are not securely attached to the terminals.
   • Solution: Use a proper crimping tool and ensure the wire is stripped to the correct length.

• Q: Can I solder wires directly to the JST Female 2P connector?

  • A: While it is possible, it is not recommended as it may damage the plastic housing. Crimping is the preferred method.

• Q: Is the JST Female 2P connector waterproof?

  • A: No, the standard JST Female 2P connector is not waterproof. Use additional sealing methods if water resistance is required.

• Q: Can I use the JST Female 2P connector for high-power applications?

  • A: No, the connector is designed for low-power applications with a maximum current rating of 3A.

• Q: How do I remove the terminals from the housing?

  • A: Use a small flathead screwdriver or a terminal removal tool to release the locking tab and gently pull out the terminal.

This concludes the documentation for the JST Female 2P connector.