Solder Splices vs. Wagos

You have two wires. You need to connect them. Do you use a $0.50 Wago lever nut or a heat gun and solder?

The Wago 221

• Pros: Instant. Reusable. Requires zero skill.
• Cons: Bulky. Can vibrate open if not secured? (Myth: Wagos are rated for high vibration).
• Verdict: Use for prototyping. Use for connections you might change (motor swaps).

The Solder Seal (Butt Connector)

• Pros: Tiny. Waterproof. Permanent.
• Cons: One-time use. Requires a heat gun. If a motor dies, you have to cut the wire.
• Verdict: Use for Production. Once your robot design is frozen, replace Wagos with solder seals to save weight and space.

The XT30 Connector

For high current (Power), never use Wagos or Solder Splices. Always use XT30 connectors.

Conclusion

• Week 1: Wagos everywhere.
• Week 4: Solder seals on sensors/servos. XT30s on motors.
• Week 8: Hot glue everything (Just kidding. Or am I?)