2-Pin JST Splicer PCB (2x2) by LDO Motors

Voron and Klipper builders know that JST-XH connection failures are the #1 source of intermittent print errors — a loose thermistor or fan connector can trigger thermal runaway or silent failures mid-print.

This 2-Pin JST Splicer PCB (2x2) by LDO Motors provides a reliable junction point to extend thermistor, LED, or fan cables without compromising signal integrity. Designed specifically for Voron, Trident, and Switchwire builds, this splicer PCB ensures secure and stable connections in high-performance CoreXY and Klipper ecosystems. Its compact 2x2 layout supports easy integration into wiring harnesses, making it ideal for case lights, bed thermistors, and other 2-pin JST-XH applications in advanced 3D printer setups.

Why Upgrade?

• Prevents intermittent thermal runaway errors caused by loose thermistor connections in Voron 2.4 and Trident printers
• Enables clean and reliable extension of LED and fan cables in Switchwire and CoreXY builds
• Reduces silent print failures by securing critical sensor wiring in Klipper-controlled machines
• Facilitates modular wiring harness upgrades for easier maintenance and troubleshooting

Best For:

• Voron 2.4 and Trident builders upgrading their wiring harness
• Switchwire users needing reliable thermistor and LED cable extensions
• Klipper ecosystem printers requiring stable JST-XH connections
• CoreXY 3D printers with complex wiring setups
• Any 3D printer using 2-pin JST-XH connectors for sensors or lighting

Pair With the Right Filament

Reliable wiring connections are essential for consistent sensor readings and print quality, regardless of filament choice.

• PLA Filament — ideal for everyday printing with stable temperature monitoring
• PETG Filament — for durable prints requiring consistent thermal feedback