Question: Is a JST connector safe for 3S packs on small RC planes?
Answer: JST connectors are commonly used in RC for low-current connections, but for 3S LiPo packs powering small planes, they may not always be ideal. Standard JST connectors (like JST-RCY) are usually rated for around 3–5 amps continuous current. If your motor or ESC draws more than this, the connector could overheat or fail.
To ensure safety, first check your ESC and motor's maximum current draw. If it stays below the JST's rating, the connector is fine. For higher current setups, consider upgrading to connectors rated for higher currents, such as XT30 or XT60, which handle 30A and 60A respectively.
When wiring your pack, make sure all solder joints are solid and insulated, and avoid using thin gauge wire that can heat up. Always test your setup under load, monitoring temperature after a short flight or bench test. If the connector feels warm or hot, switch to a higher-rated connector.
In summary, JST connectors can be safe for low-current 3S packs in small planes but verify current limits and upgrade if necessary.
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