Introduction
When building or upgrading your RC vehicle or drone, choosing the right power connectors is crucial for safety, performance, and ease of use. Two of the most popular connector types are the XT60 and XT90, but many hobbyists also consider bullet connectors for their projects. In this post, we'll break down the differences between these connectors, helping you decide which one suits your RC build best.
Understanding the Connectors
XT60 Connectors
The XT60 is a widely used connector in the RC community, especially for small to medium-sized models. It’s rated for up to 60 amps continuous current and features a secure, keyed design to prevent reverse polarity connections. The connector is made from durable nylon with gold-plated contacts to ensure good conductivity and resistance to corrosion.
XT90 Connectors
The XT90 is essentially a beefed-up version of the XT60, designed for higher current applications. It can handle continuous currents up to 90 amps, making it ideal for larger RC cars, planes, or drones that demand more power. Like the XT60, it is also keyed and polarized, providing a safe and reliable connection. The larger size means it’s a bit heavier and bulkier, but it offers better heat dissipation and durability under heavy loads.
Bullet Connectors
Bullet connectors are cylindrical, simple connectors where a male pin slides into a female socket. They come in various sizes (e.g., 3.5mm, 4mm, 5.5mm) and are popular for their modularity and ease of replacement. However, they are generally less secure compared to XT connectors and can sometimes loosen with vibration. Bullet connectors can handle a wide range of currents depending on size, but they require careful soldering and insulation to prevent shorts.
Comparing XT60, XT90, and Bullet Connectors
Here’s a quick rundown of the main differences:
- Current Rating: XT60 (60A), XT90 (90A), Bullet connectors (varies by size)
- Size & Weight: XT60 is compact, XT90 is bigger and heavier, bullet connectors vary
- Safety: XT connectors have keyed, polarised housings to prevent reverse connections; bullet connectors rely on correct wiring and insulation
- Durability: XT connectors are rugged and resistant to vibration; bullet connectors may loosen over time
- Ease of Use: XT connectors are quick to connect/disconnect with a secure fit; bullet connectors require careful assembly
Which Connector Should You Choose?
Your choice depends on your specific RC application:
- Small to Medium Models: XT60 connectors are usually sufficient for drones, smaller cars, or planes running under 60 amps.
- Larger or High-Power Builds: If your setup demands more current (e.g., powerful trucks, large drones), XT90 connectors provide extra headroom and reliability.
- Custom or Modular Systems: Bullet connectors offer flexibility and easy swapping of components but require extra care in assembly and maintenance.
Tips for Working with Connectors
- Always use a good quality soldering iron and heat shrink tubing for clean, strong connections.
- Double-check polarity before connecting to avoid damaging your electronics.
- Keep connectors clean and free from debris to maintain good contact.
- Consider your model’s vibration levels; secure connectors prevent accidental disconnections during use.
Conclusion
For most UK hobbyists and makers working with RC power systems, XT60 and XT90 connectors are the go-to choices thanks to their reliability, safety features, and ease of use. Bullet connectors can be handy for specific projects but require more care during installation. By understanding the strengths and limitations of each connector type, you can ensure your RC build runs smoothly and safely.
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