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

Specifications

• Connector Type: JST XH 2-Pin 
  
• Pin Pitch: 2.54mm (0.1 inch)
  
• Keying: Polarised housing (prevents reverse insertion)
  
• Rated Voltage: 250V AC / DC
  
• Rated Current: 3A AC / DC (AWG dependent)
  
• Wire Gauge: 26 AWG flexible stranded wire
  
• Wire Length: ~20 cm (200 mm)
  
• Wire Color Coding: Red (Positive) / Black (Ground or Negative)
  
• Contact Resistance: ≤ 20 mΩ
  
• Insulation Resistance: ≥ 1000 MΩ
  
• Withstanding Voltage: 1000V AC/minute
  
• Operating Temperature: -25°C to +85°C

Project Evolution

Unlock New Capabilities

Past Projects (Prerequisites)
If you've already experimented with basic breadboard circuits using standard Dupont jumper cables or built simple battery-powered Arduino setups, you've likely experienced how fragile loose jumper connections can be. Upgrading to keyed JST connectors is the natural next step in making your electronics builds robust and production-ready.

Feature Upgrade (What This Unlocks)
This 2-Pin JST XH Wire Harness unlocks quick-disconnect power modules for custom 3D-printed enclosures, vibration-proof battery connections for mobile robots, and modular power distribution rails across custom PCBs. These secure, polarized connections eliminate the risk of accidental reverse polarity damage when swapping out power sources or modular sub-assemblies.

Effort Level & Minimum Hardware

• Effort Level: Beginner

Minimum hardware to get started:

• Power Source or Li-Ion / LiPo Battery — to supply working voltage to your circuit through a reliable, polarized connection.
• Development Board or Custom PCB — to solder or connect the male JST header pin to your project circuit.
• Heat Shrink Tubing or Electrical Tape — to insulate open wire splices and prevent accidental short circuits against metallic components.

Virtual Technician & Wiring Guide

⚠️ Safety Warnings:

• Polarity Verification: Always confirm polarity alignment (Red for Positive VCC, Black for Ground/GND) before plugging into live power rails. Connecting power in reverse can permanently damage sensitive microcontrollers and ICs.
• Current Limit: Do not exceed 3A continuous DC current through the 26 AWG harness wires to avoid resistive heating and insulation breakdown.
• Solder Joint Integrity: Ensure soldered wire extensions are insulated with heat shrink to prevent exposed copper from touching adjacent PCB traces.

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 2-pin JST XH connector compatible with standard 2.54mm breadboards or PCBs?
   Yes, the 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 JST XH wire harness with LiPo or Li-Ion battery packs?
   Yes, many 1S/2S battery balance leads and low-voltage battery packs utilize 2.54mm JST XH connectors for power delivery.
3. Does this harness mate with 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 shell geometry.
4. Can I use this wire harness with an Arduino Uno or ESP32 development board?
   Yes, you can solder the male header onto your custom shield or prototype board to create a quick-disconnect power terminal for your microcontroller.
5. What is the maximum voltage rating for this 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 2-pin JST XH wire harness safely carry?
   This wire harness assembly is rated for up to 3A DC continuous current under normal ambient operating conditions.
7. Can I use this harness for high-current motor drivers drawing over 5A? No, for continuous current loads exceeding 3A, high-power connectors such as XT60 or JST VH series are recommended to avoid thermal overload.
8. How do I connect the 2-pin JST XH wire harness to my circuit?
   Connect the red wire lead to the positive voltage terminal (VCC/+) and the black wire lead to the negative or ground terminal (GND/-).
9. Is the JST XH connector housing polarised to prevent reverse connection? Yes, both the female plug housing and male PCB header feature molded keying guides that physically prevent backward or inverted insertion.
10. Can I extend or solder the wires on this harness assembly?
    Yes, the flexible stranded copper wire ends can be easily stripped, soldered to other cables, and insulated using heat shrink tubing.
11. Do I need any software libraries or code drivers to use this connector?
    No, this product is a passive mechanical hardware component and requires no software libraries, firmware, or drivers to function.
12. Can I monitor power passing through this harness in Arduino code?
    Yes, by wiring an inline current sensor module (such as an INA219 or ACS712) in series with the positive lead, you can measure current programmatically.
13. Are any specific pin definitions needed in my code sketch for this harness?
    No software pin definitions are necessary because the harness serves as a physical electrical wire connection.
14. Why is power not flowing through the connected JST XH harness?
    Check for cold solder joints on the male PCB header and ensure the female harness plug is fully seated and latched into the header body.
15. What should I do if a pin feels loose inside the female plastic housing? Gently inspect the small metal locking tab on the crimped pin terminal and bend it slightly outward so it locks securely inside the plastic housing slot.
16. Why are the harness wires getting warm during operation?
    Wire heating indicates that the connected circuit is drawing current near or above the 3A maximum continuous rating of the 26 AWG wire harness.
17. Can I remove individual terminal wires from the female housing plug?
    Yes, you can depress the small plastic retention latch inside the housing using a fine needle or precision tip tool to pull out individual crimp pins.
18. Does Probots offer bulk discounts for commercial or institutional orders of JST XH connectors?
    Yes, Probots provides tiered volume pricing and bulk procurement support for universities, industrial clients, and commercial manufacturers.
19. Are these JST XH connectors pre-assembled and tested?
    Yes, each wire harness arrives pre-crimped with 20cm wire leads and undergoes visual QC testing to ensure proper wire retention.
20. Does Probots provide technical support if I have trouble wiring this connector harness?
    Yes, our technical engineering team in Bangalore is available to assist you with component compatibility and wiring inquiries.