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Hardware reference for the Delta GaN ESC — connectors, pads, power terminals, and the 3D model. All four interfaces — servo/PPM, CAN, UART, and USB-C — sit on the same edge of the board.
Check the pin order against the board before wiring. Signal order reverses depending on which side you view the connector from — match the sequence to the matching view below, and confirm against the silkscreen with the board in front of you.

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Board views

Delta GaN ESC connector face: servo/PPM, CAN, USB-C and UART connectors

Connector face — signal and interface edge, viewed from the connector end

Delta GaN ESC component side showing UART, USB-C, serial number, phase current shunts, VIN+ and GND

Component side — UART, USB-C, serial marking, current shunts and power terminals

Delta GaN ESC MCU side showing CAN and servo connectors, motor phase pads, VIN+ and GND

MCU side — logic, CAN and servo interface, phase pads and power terminals

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Signal connectors

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Servo / PPM

2-pin JST-SH 1.0. This is the PPM input configured in input configuration.

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CAN

4-pin JST-SH 1.0. Used for UAVCAN / DroneCAN and VESC-native CAN.
Wire only GND, CANH, and CANL. Leave the 3.3 V pin unconnected.This is the recommended way to connect the Delta to a CAN bus. The 3.3 V pin is not intended to power external devices — see auxiliary power — and connecting it to a device that supplies its own rail ties two supplies together.

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UART

4-pin, 3.3 V logic.
The data pins are shared between UART and I2C — TX doubles as SCL, RX as SDA. Which function is active depends on firmware configuration; the pins cannot serve both at once.Ex is not connected.
UART is 3.3 V logic. Do not connect a 5 V device directly without level shifting.

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USB-C

Configuration, telemetry, and firmware update.
USB is data only — the Delta is not powered over USB. It will not boot or enumerate until DC power is applied to the main terminals. Use a USB A → USB C cable. See the quickstart.

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Power and phase

High voltage and high current. Up to 93 V continuous input and 70 A continuous output with forced airflow. Never make or break these connections under load, and use an anti-spark connector on the battery side.
Solder motor leads to the phase pads on the MCU side only.The U / V / W features in the corresponding position on the component side are the phase current shunts, not solder pads. Do not solder motor leads to them.
Phase order determines direction of rotation. Prefer flipping the direction toggle in Motor Settings over swapping phase leads — see motor tuning.

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Auxiliary power

The Delta’s low-voltage rails are sized for the controller’s own logic and gate drive. They are not a general-purpose supply, and auxiliary capacity is limited.
Do not power external devices through the board. Receivers, companion computers, servos, lights, and any other load should be powered from their own supply, not from the Delta.Anything drawn from the board’s rails comes out of the budget the controller needs to run.
Browning out the low-voltage rail takes the controller’s logic down with it. On a moving vehicle that means losing motor control.

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Serial number

Each board carries a unit ID on the component side, next to the UART connector (for example 0007). Quote this for support and RMA.

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NDAA compliance

Serial numbers prefixed with N — for example N0007 — identify NDAA-compliant boards.
If NDAA compliance is a requirement for your programme, check the prefix on the physical board. The marking on the unit is the authoritative record.

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3D model

STEP model of the Delta (Rev 3.3, no-header variant) for mechanical fit checks, enclosure design, and airflow planning.

Download STEP model

delta-rev3_3-no-header.step — 9.8 MB, hosted on GitHub
A STEP (ISO-10303-21) assembly exported from KiCad. The link opens the file on GitHub — use the Download button there, then open it in your CAD tool. It will not preview in the browser.

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Not yet documented

Input configuration

PPM, ADC, UART, and CAN control sources.

UAVCAN / DroneCAN

Running the Delta as a UAVCAN ESC node.
Last modified on September 8, 2026