4-pin JST XH Polarised Connector 2mm Pitch Male & Female Wire Harness

Specifications:

• Connector Family: JST XH Series
  
• Pin Count: 4-Pin
  
• Pitch: 2.0mm
  
• Current Rating: 3A AC/DC max
  
• Voltage Rating: 250V AC/DC max
  
• Contact Resistance: ≤ 20 mΩ
  
• Insulation Resistance: ≥ 1000 MΩ
  
• Wire Gauge: 26 AWG 
  
• Wire Length: 150mm 
  
• Wire Colors: Alternating Red/Black Lead Harness
  
• Connector Gender: Female Wire Harness + Male Board Header
  
• Mating Mechanism: Polarized / Keyed Friction Latch
  
• Operating Temperature: -25°C to +85°C
  
• Compatible Platforms: Custom PCBs, Microcontroller Boards, I2C/SPI Sensor ModulesProject Evolution

Project Evolution

• Past Projects (Prerequisites): If you've already experimented with basic breadboard circuits, 2-pin power setups, or 3-pin sensor wiring, you know how easily loose jumper wires can slip off during movement or testing.

   

• Feature Upgrade (What This Unlocks): This 4-pin JST XH wire harness unlocks compact 4-wire interconnects for OLED/LCD display modules (VCC, GND, SDA, SCL), SPI sensor breakout boards, stepper motor leads, and multi-channel power routing. It converts fragile breadboard prototypes into durable, vibration-resistant, plug-and-play enclosures ready for field deployment.

  Effort Level & Minimum Hardware:

• Effort Level: Beginner

     Minimum hardware to get started:

• Soldering Iron or PCB Header Socket: Required to solder the male 3-pin header block onto your custom PCB or breakout board for a solid structural anchor.
• Power Source or 3-Wire Sensor Module: Required to supply power/ground and route signals through the pre-crimped female wire leads.
• Heat Shrink Tubing: Recommended to insulate exposed wire ends after splicing onto external components.

Virtual Technician & Wiring Guide
 Safety Warnings:

• Pinout Alignment Warning: Always double-check wire color order against your PCB pinout before connecting power. While the connector housing is keyed to prevent reverse insertion, soldering the male header backward on a custom board will invert power and data lines.
• Current Limit: Do not exceed 3A continuous DC current through the 26 AWG lead wires to prevent conductor heating and voltage drop.
• Soldering Iron & Solder: Needed to securely attach the male 2-pin header onto your circuit board or sensor module.
• Wire Strippers: Needed if you need to trim or strip the pre-tinned wire leads to length.
• Heat Shrink Tube Assortment Kit: Provides clean, professional insulation over soldered wire splices. 

Package Includes: 

1× 4-pin JST XH Female Housing Connector with pre-crimped 150mm Wire Lead 

1× 4-pin JST XH Male Straight PCB Header Block 

Frequently Asked Questions ( FAQ)

1. Is this 4-pin JST XH connector compatible with standard 2.54mm breadboards?
   No, this model features a 2.0mm pitch spacing, which is smaller than the standard 2.54mm (0.1 inch) breadboard grid.
2. Can I connect this 4-pin 2mm JST cable directly to standard female jumper wire headers?
   No, the 2.0mm pin spacing will not align with standard 2.54mm header sockets.
3. Is this 4-pin connector suitable for OLED display modules and I2C sensors?
   Yes, it is ideal for 4-pin I2C devices requiring Power (VCC), Ground (GND), Data (SDA), and Clock (SCL) lines.
4. Can I solder the male header block into standard 2mm pitch PCB holes?
   Yes, the included straight male header is designed to solder directly into custom 2.0mm pitch PCB through-holes.
5. What is the maximum voltage rating for this 4-pin JST wire harness?
   This connector assembly is rated for up to 250V AC/DC maximum.
6. How much continuous current can each wire in this 4-pin harness carry?
   Each contact pin and 26 AWG lead wire is rated to safely carry up to 3A continuous DC current.
7. Will drawing more than 3A damage the connector contacts?
   Yes, exceeding 3A continuously can cause resistive heating, wire insulation melting, and contact degradation.
8. How does this 4-pin connector prevent reverse-polarity or backward insertion?
   The housing features side alignment slots and a top latching guide that physically prevent the socket from plugging in backward.
9. What are the colors of the pre-crimped wire leads?
   The wire harness comes pre-crimped with alternating Red and Black color-coded leads for pin identification.
10. Can I remove or swap individual wire terminals from the female housing?
    Yes, gently pressing down on the tiny metal locking tab on the terminal pin allows you to slide the lead out and reconfigure wire position.
11. Do I need any software drivers or code libraries to use this wire connector?
    No, this is a purely mechanical and electrical hardware interface requiring no software drivers or libraries.
12. How do I read an I2C sensor connected via this 4-pin wire harness in Arduino?
    Wire VCC/GND to power rails and route SDA/SCL to your microcontroller's I2C pins, then use standard Wire.h commands.
13. Can I use this 4-pin connector to pass SPI communication signals?
    Yes, it can carry standard 4-wire SPI buses (MOSI, MISO, SCK, CS) or 3-wire SPI plus ground.
14. Why is my female JST connector loose on the male PCB header?
    Check that the top locking latch on the female socket fully snaps over the retention ridge on the male header.
15. Why am I getting intermittent communication or power loss on my board?
    Inspect the solder joints on the male PCB header to ensure there are no cold solder joints or broken PCB traces.
16. What should I do if a wire pulls out of the JST plastic socket?
    Slightly lift the small metal locking tab on the crimp contact with a needle before reinserting it into the socket until it clicks.
17. My I2C device is not responding even though the connector is plugged in — what is wrong?
    Verify continuity across all four wire leads using a multimeter to rule out broken internal conductors or misaligned pins.
18. Does Probots offer bulk quantities of 4-pin JST XH connectors for production runs?
    Yes, Probots provides bulk quantity pricing options for commercial production lines, universities, and research labs.
19. Are both the female wire harness and male PCB header included in this purchase?
    Yes, each unit includes one pre-wired female JST cable assembly and one matching male straight PCB header.
20. Does Probots inspect wire crimps and pin retention before shipping?
    Yes, every batch undergoes Probots™ QC-Pass ✅ inspection to guarantee proper pin seating and reliable wire crimp strength.