XT60 vs XT90 vs Bullet Connectors: Which is Best for Your RC Power System?

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Introduction

If you're into RC planes, drones, cars, or boats, choosing the right connector for your battery and ESC (Electronic Speed Controller) is crucial. The connector affects not just the power delivery but also the reliability and safety of your setup. In this post, we'll compare three popular types of connectors found in the UK RC hobby scene: XT60, XT90, and bullet connectors.

What Are XT60 and XT90 Connectors?

Both XT60 and XT90 connectors are made by Amass and are widely used for LiPo battery connections. They are known for their sturdy build, secure fit, and high current handling capabilities. The main difference between them is their size and current rating.

XT60 Connectors

XT60 connectors are smaller and designed to handle currents up to about 60 amps continuously. They are commonly used in medium-sized RC planes, drones, and cars. The connector features a tight friction fit that prevents accidental disconnections and ensures good conductivity.

XT90 Connectors

XT90 connectors are larger and can handle continuous currents of up to 90 amps, making them suitable for larger or more power-hungry builds. They provide a more robust connection and are often used in bigger drones, electric skateboards, or high-power RC vehicles.

What About Bullet Connectors?

Bullet connectors are simple cylindrical connectors that come in various sizes, typically 3.5mm, 4mm, or 5.5mm diameter bullets. They are popular due to their versatility and ease of soldering. Bullet connectors are commonly found in motors and ESC leads as well as battery connections.

However, bullet connectors usually require a bit more care to ensure a secure fit. They rely on the tightness of the male and female bullet ends to maintain a good connection. Because of this, they may be more prone to slight disconnections under vibration unless properly secured.

Comparing XT60, XT90, and Bullet Connectors

Here’s a quick comparison to help you decide which connector suits your project:

  • Current rating: XT60 up to 60A, XT90 up to 90A, bullet connectors vary by size but typically 30A-60A.
  • Size and weight: XT60 is compact, XT90 is larger and heavier, bullet connectors are generally lightweight and compact.
  • Ease of use: XT connectors have a foolproof, polarity-specific design; bullet connectors require care to avoid reverse polarity.
  • Reliability: XT connectors offer a secure, vibration-resistant connection; bullet connectors may loosen over time without extra securing methods.
  • Availability and cost: XT connectors can be more expensive but are widely available; bullet connectors are cheaper and common in many kits.

Which One Should You Choose?

For most hobbyist RC pilots and makers in the UK, XT60 connectors are the go-to choice for small to medium builds. They offer an excellent balance of size, current handling, and reliability.

If you’re working on a high-power setup, like a large drone or electric skateboard, XT90 connectors provide the extra current capacity and robust connection you need.

Bullet connectors are great for motor connections or where flexibility is important, but they might not be the best choice for main battery leads unless secured well.

Tips for Using Connectors Safely

  • Always double-check polarity before soldering.
  • Use a good quality soldering iron and solder for solid joints.
  • Consider heat shrink tubing to insulate and protect connections.
  • Secure bullet connectors with zip ties or heat shrink to prevent vibration loosening.
  • Inspect connectors regularly for wear or damage.

Conclusion

Choosing the right connector depends on your specific RC power needs. XT60 is versatile and reliable for most projects, XT90 is better for high current demands, and bullet connectors offer flexibility but need careful handling. By picking the right connector and maintaining it well, you’ll enjoy better performance and safer flights or rides.

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