2 Pin JST GH Male Connector 1.25mm Pitch Straight Header PCB Pin

Specifications

• Connector Series: JST GH
  
• Number of Pins: 2 Pin
  
• Pin Pitch: 1.25mm (0.049 inch)
  
• Mounting Style: Straight / Top Entry Through-Hole PCB Header
  
• Rated Voltage: 50V AC / DC
  
• Rated Current: 1A AC / DC per pin
  
• Contact Resistance: ≤ 30 mΩ
  
• Insulation Resistance: ≥ 100 MΩ
  
• Withstanding Voltage: 500V AC/minute
  
• Operating Temperature: -25°C to +85°C
  
• Contact Material: Phosphor Bronze (Tin-plated)
  
• Dimensions: 1.25mm pitch (Height: ~4.2mm)
  
• Weight: 0.005 kg [Estimated]
  
• Compatible Harness: 2-Pin JST GH Female Plug Cable Housing

Project Evolution

Unlock New Capabilities

• Past Projects (Prerequisites): If you've already experimented with 2.54mm pin headers or standard JST XH connectors on basic Arduino or ESP32 prototyping boards, you know how quickly bulky wiring eats up chassis real estate. Upgrading to the 2-Pin JST GH male straight connector is the natural next step when transitioning to ultra-compact micro-robotics, drone telemetry builds, and high-density PCB designs.
• Feature Upgrade (What This Unlocks): This 2-Pin JST GH Male Straight Header unlocks low-profile power and signal interconnects for space-constrained electronics. Featuring a tight 1.25mm pitch and an integrated positive locking latch, it ensures your battery or signal leads remain securely mated even in high-vibration environments like quadcopters, RC models, and wearable sensors.

Effort Level & Minimum Hardware

• Effort Level: Beginner

Minimum hardware to get started:

• Custom PCB or Perfboard — required to solder the 2-pin through-hole straight header onto your circuit layout.
• Soldering Station & Fine-Tip Solder — essential for cleanly soldering the 1.25mm pitch header pins without creating solder bridges.
• 2-Pin JST GH Female Wire Harness Cable — required to mate with this PCB header for power distribution or signal routing.

Virtual Technician & Wiring Guide
⚠️ Safety Warnings:

• Pin Pitch & Soldering Heat: Due to the fine 1.25mm pin spacing, avoid applying prolonged heat with a soldering iron (keep contact under 3 seconds at 300°C) to prevent melting the plastic housing.
• Current Limits: Do not exceed 1A continuous DC current through either pin. For higher current power distribution, upgrade to JST XH (2.54mm) or XT30/XT60 power connectors.
• Polarity Check: Always verify positive (VCC) and ground (GND) pin alignment before connecting a pre-crimped female harness to avoid reverse-polarity damage to your board.

Package Includes: 

1× 2-Pin JST GH Male Straight PCB Header Connector (1.25mm Pitch) 

Frequently Asked Questions

1. Is this 2-pin JST GH male connector compatible with 1.25mm pitch female cable harnesses?
   Yes, this 2-pin straight male header is specifically designed to mate with standard 2-pin JST GH series female wire harness plugs with 1.25mm pitch.
2. Can I use this connector on drone flight controllers like Pixhawk or Cube? Yes, JST GH series connectors with 1.25mm pitch are widely used across Pixhawk, ArduPilot, and various drone flight controller telemetry and CAN bus ports.
3. Is this JST GH connector interchangeable with JST SH or JST ZH connectors?
   No, JST GH (1.25mm pitch with locking latch) is mechanically incompatible with JST SH (1.0mm pitch) or JST ZH (1.5mm pitch) headers due to different pitch dimensions and housing structures.
4. What is the maximum voltage rating for this 2-pin JST GH straight header? This JST GH male connector is rated for operation up to 50V AC/DC.
5. How much current can each pin of this 2-pin JST GH connector handle? Each pin is rated to carry up to 1A AC/DC continuous current under standard operating conditions.
6. Does this 2-pin JST GH header feature a locking latch to prevent accidental disconnection?
   Yes, the housing incorporates a positive locking latch mechanism that securely locks the mating female cable plug in high-vibration applications.
7. How should I orient this straight header during PCB assembly?
   Mount the header vertically through the PCB pads with the locking latch groove facing toward the desired cable insertion direction.
8. Do I need any software configuration or drivers to use this JST GH connector?
   No, this product is a passive mechanical PCB component and requires no software drivers, code libraries, or firmware setup.
9. Can this 2-pin JST GH connector transmit high-frequency digital signals or telemetry data?
   Yes, it reliably carries digital GPIO, CAN bus, UART, or power signals provided the current does not exceed 1A per pin.
10. What should I do if the plastic housing melts while soldering the header to my PCB?
    Limit soldering iron contact time to under 3 seconds per pin at 300°C to prevent thermal deformation of the thermoplastic housing.
11. Why is the female JST GH plug not locking into the male header?
    Inspect both the header latch ridge and female plug lock for solder debris or plastic flash that may be blocking full engagement.
12. What causes intermittent connection issues across the 2-pin header? Check for cold solder joints at the PCB pads or oxidized pins, and ensure the female wire harness crimps are fully seated in their plug.
13. Are these 2-pin JST GH connectors verified for quality before shipping? Yes, every batch undergoes visual QC inspection at Probots in Bangalore to confirm accurate 1.25mm pin pitch and intact locking latches.
14. Can I purchase these 2-pin JST GH connectors in bulk for production runs? Yes, Probots offers volume pricing and bulk packaging for university labs, drone manufacturers, and commercial R&D teams.
15. Does Probots provide technical guidance if I need help selecting connector sizes?
    Yes, our engineering support team in Bangalore can assist you with pinout verification, mating harness selection, and PCB compatibility.