3-Pin JST XH Polarised Connector 2.54mm Pitch Male and Female Wire Harness Cable

Specifications

• Connector Type: JST XH 3-Pin (Male PCB Header & Female Wire Harness)
  
• Pin Pitch: 2.54mm (0.1 inch)
  
• Keying: Polarised housing (prevents reverse insertion)
  
• Rated Voltage: 250V AC / DC
  
• Rated Current: 3A AC / DC
  
• Wire Gauge: 26 AWG flexible stranded wire
  
• Wire Length: ~20 cm (200 mm)
  
• Wire Color Coding: Red (VCC), Black (GND), Yellow/White (Signal)
  
• Contact Resistance: ≤ 20 mΩ
  
• Insulation Resistance: ≥ 1000 MΩ
  
• Withstanding Voltage: 1000V AC/minute
  
• Operating Temperature: -25°C to +85°C
  
• Compatible Platforms: Custom PCBs, 2.54mm headers, analog/digital sensors, servos, microcontrollers

Project Evolution

Unlock New Capabilities

• Past Projects (Prerequisites): If you've already experimented with basic 2-pin power connections, breadboard jumper wires, or 3-pin sensor modules like IR distance or temperature sensors on an Arduino, you already understand how convenient 3-wire interfaces (VCC, GND, Signal) are for prototyping. Upgrading to a keyed 3-pin JST XH harness is the perfect step toward making those sensor connections reliable and modular.
• Feature Upgrade (What This Unlocks): This 3-Pin JST XH Wire Harness unlocks quick-disconnect 3-wire sensor modules, vibration-proof servo motor leads, and clean power-plus-data wiring harnesses across custom PCBs and 3D-printed enclosures. By replacing loose jumper wires with a keyed connector, you eliminate intermittent signal drops and prevent accidental cross-wiring of power and signal lines.

Effort Level & Minimum Hardware
Effort Level: Beginner

Minimum hardware to get started:

• Microcontroller or Development Board (Arduino, ESP32, or Raspberry Pi) — to send/receive data signals and provide power through the 3-pin harness.
• 3-Wire Sensor or Servo Motor — to connect to the wire harness assembly for reliable power and signal transmission.
• Soldering Station & Solder Wire — required to solder the male JST header onto your custom PCB or join harness wires securely to your device.
• Heat Shrink Tubing — to insulate wire splices and prevent accidental short circuits between adjacent power and signal leads.

Virtual Technician & Wiring Guide
⚠️ Safety Warnings:

• Pinout Verification: Always confirm pin assignment (typically VCC, GND, and Signal) before applying power. Swapping power and signal lines can permanently damage sensitive microcontrollers or sensors.
• Current Limits: Ensure total current passing through all three 26 AWG harness wires does not exceed 3A continuous DC per pin.
• Insulation & Strain Relief: Always insulate soldered wire extensions with heat shrink tubing to prevent exposed copper strands from shorting against metal frames or adjacent PCB pads.

Required Additional Items

• 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× 2-pin JST XH Female Housing Connector with pre-crimped 150mm Wire Lead 

1× 2-pin JST XH Male Straight PCB Header Block 

Frequently Asked Questions

1. Is this 3-pin JST XH connector compatible with standard 2.54mm breadboards or PCBs?
   Yes, the 3-pin male header features a standard 2.54mm (0.1 inch) pin pitch that fits seamlessly into perfboards, breadboards, and custom PCB layouts.
2. Can I use this 3-pin JST XH wire harness with analog and digital sensors? Yes, 3-pin JST XH connectors are widely used for connecting 3-wire analog and digital sensors (such as temperature, IR, or distance sensors) to microcontrollers.
3. Does this harness mate with 3-pin JST PH or JST VH connectors?
   No, JST XH (2.54mm pitch) is mechanically incompatible with JST PH (2.0mm pitch) or JST VH (3.96mm pitch) connectors due to differing pin spacing and body geometry.
4. Can I use this harness to connect servos or 3-pin LED modules?
   Yes, it is fully compatible with standard 3-pin servo signals, addressable LED data lines, and power interfaces requiring a secure 3-wire connection.
5. What is the maximum voltage rating for this 3-pin JST XH wire harness? The connector housing and 26 AWG insulated wire harness are rated for operation up to 250V AC/DC.
6. How much current can this 3-pin JST XH wire harness safely carry?
   This 3-wire harness assembly is rated for up to 3A DC continuous current per pin under normal ambient operating conditions.
7. Can I use this harness for high-current motors drawing over 5A?
   No, for continuous current loads exceeding 3A, higher-rated power connectors such as XT60 or JST VH series should be used to prevent thermal overload.
8. How are the 3 wires in this harness color-coded?
   The harness generally follows standard 3-wire conventions: Red for Positive Power (VCC), Black for Ground (GND), and Yellow or White for Signal/Data.
9. Is the 3-pin JST XH connector housing polarised to prevent incorrect insertion?
   Yes, both the female plug housing and male PCB header feature molded guide keys that physically prevent backward or inverted mating.
10. Can I extend or solder the wires on this 3-pin harness assembly?
    Yes, the flexible stranded copper wire leads can be easily stripped, soldered to other cables or sensors, and insulated using heat shrink tubing.
11. Do I need any software libraries or drivers to use this 3-pin connector?
    No, this product is a passive mechanical hardware component and requires no software libraries, drivers, or firmware.
12. Can I transmit high-speed digital signals like SPI or UART through this harness?
    Yes, for short cable runs (~20cm), the harness reliably carries UART, I2C, PWM, or digital sensor signal lines without significant attenuation.
13. Are any specific pin declarations required in Arduino or MicroPython code?
    No software code declarations are necessary because the harness serves as a physical electrical wire connection.
14. Why is my sensor not receiving power through the connected JST XH harness?
    Check for cold solder joints on the male PCB header and verify that the female harness plug is fully pushed in and locked into the header housing.
15. What should I do if a wire pin feels loose inside the female plastic plug? Carefully inspect the small metal locking latch on the crimped terminal pin and gently bend it outward so it snaps firmly into the plastic housing slot.
16. Why are the harness wires getting warm during operation?
    Heating indicates that the connected circuit or actuator is drawing current close to or exceeding the 3A maximum continuous rating of the 26 AWG wires.
17. Can I swap or reorder individual wires inside the 3-pin female plug?
    Yes, you can depress the small plastic retention tab on the housing using a precision pin or needle to extract and re-position individual crimp pins.
18. Does Probots offer bulk quantity discounts for 3-pin JST XH wire harnesses?
    Yes, Probots provides tiered pricing and volume procurement options for educational institutes, industrial clients, and OEM manufacturers.
19. Are these 3-pin JST XH connectors pre-assembled and tested?
    Yes, each wire harness comes pre-crimped with 20cm wire leads and undergoes visual QC inspection to verify solid wire retention and pitch accuracy.
20. Does Probots provide technical support if I need assistance with wiring or compatibility?
    Yes, our technical support team in Bangalore is available to assist you with wiring inquiries, pinouts, and component integration.