How to Use JST PH 2.54 connector: Examples, Pinouts, and Specs

The JST PH 2.54 Connector (Manufacturer Part ID: JST 2.54 2P) is a compact, reliable connector designed for connecting wires in electronic circuits. With a 2.54mm pitch, it is widely used in low-power applications where space-saving and secure connections are essential. This connector is part of the JST PH series, known for its durability and ease of use.

• Consumer Electronics: Used in devices like remote controls, toys, and small appliances.
• Prototyping and DIY Projects: Ideal for connecting sensors, modules, and other components.
• Battery Connections: Commonly used for connecting rechargeable batteries to circuits.
• LED Lighting: Provides a secure connection for low-power LED strips and modules.

The following table outlines the key technical details of the JST PH 2.54 Connector:

The JST PH 2.54 Connector typically has two pins, as described below:

1. Wire Preparation:

   • Strip the insulation from the wire ends (approximately 2-3mm).
   • Ensure the wire gauge is compatible (28-22 AWG).

2. Crimping:

   • Use a compatible crimping tool to attach the crimp terminals to the wire ends.
   • Ensure a secure crimp to avoid loose connections.

3. Connector Assembly:

   • Insert the crimped terminals into the connector housing until they click into place.
   • Verify that the terminals are securely locked.

4. Circuit Connection:

   • Plug the connector into the corresponding male header or socket.
   • Ensure proper polarity to avoid damage to the circuit.

• Polarity: Always double-check the polarity of the connections to prevent damage to components.
• Secure Connections: Ensure the crimp terminals are properly seated in the housing to avoid intermittent connections.
• Current and Voltage Limits: Do not exceed the specified current (2A) and voltage (100V) ratings.
• Environmental Conditions: Avoid exposing the connector to temperatures or conditions outside its operating range (-25°C to +85°C).

The JST PH 2.54 Connector can be used to connect a sensor or module to an Arduino UNO. Below is an example of connecting a 5V sensor:

• Pin 1 (Positive): Connect to the Arduino's 5V pin.
• Pin 2 (Negative): Connect to the Arduino's GND pin.

// Example code for reading data from a sensor connected via JST PH 2.54 connector
// Ensure the sensor's output is connected to Arduino pin A0

const int sensorPin = A0; // Analog pin connected to the sensor 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 sensor value
  Serial.print("Sensor Value: "); 
  Serial.println(sensorValue); // Print the sensor value to the Serial Monitor
  delay(500); // Wait for 500ms before the next reading
}

1. Loose Connections:

   • Issue: The connector feels loose or the circuit intermittently disconnects.
   • Solution: Ensure the crimp terminals are properly seated in the housing. Use a crimping tool for a secure fit.

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 does not exceed the 2A rating. Use thicker wires if necessary.

4. Connector Does Not Fit:

   • Issue: The connector does not fit the mating header or socket.
   • Solution: Ensure the mating component is compatible with the 2.54mm pitch.

Q1: Can the JST PH 2.54 Connector be used for high-power applications?
A1: No, this connector is designed for low-power applications with a maximum current rating of 2A.

Q2: What tools are required for crimping?
A2: A compatible crimping tool, such as the JST WC-240, is recommended for secure and reliable crimps.

Q3: Can I reuse the connector housing?
A3: Yes, the housing can be reused, but ensure the crimp terminals are not damaged during removal.

Q4: Is the connector waterproof?
A4: No, the JST PH 2.54 Connector is not waterproof. Use additional protection if operating in wet environments.