The JST XH 3-pin header & cable set. 100mm long, 2.5mm pin pitch
We're finding that you can't have enough unique plug systems in a project. Use one style for power; another for inputs; another for outputs - there's no chance of getting something miswired when you finally have your project attached to the underside of a model's runway costume.
Here's one of the plug standards we're using: The JST XH 3-pin plug and cable set.