Deans T-plug Pinout
Compact two-pole T-shaped RC battery connector rated to roughly 50-60 A.
Overview
The Deans Ultra Plug ('T-plug') is a two-contact RC power connector named for its T-shaped body. Its asymmetric blade layout polarizes the mating so positive only meets positive.
One flat blade is positive and the other negative; the offset T geometry prevents reverse insertion. Widely used on RC batteries and ESCs as a higher-current alternative to the Tamiya plug.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| + | Positive | SIGNAL | Positive blade contact (marked +) |
| - | Negative | SIGNAL | Negative blade contact (marked -) |
Notes
- Polarized by body shape - the pair only mates one way.
- Look for the molded + / - marks; wiring the battery reversed damages equipment despite the keying.
Reference: W.S. Deans - Ultra Plug product page· verified 2026-06-27