Generic UART No.2 Sine-Wave Controller 45A
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Generic 36–72V sine-wave BLDC e-bike controller rated for 45A continuous (15-FET class). Runs sensored sine-wave with the motor's hall sensors and falls back to sensorless square-wave if the hall signal is lost. Communicates over the UART No.2 (S866/SW900-family) protocol on a 5-pin connector, pairing with SW900, S866, M8/TF-M8, or UKRiver UKC1 (OMD) displays.
In brief: 36–72V controller. 45A continuous. Sinewave, dual mode support. From $55 across 3 sellers.
Specs verified Jun 18, 2026
Where to Find
Prices tracked across 4 sellerseBay - NBPower (eBay)
$54.90
AliExpress - RisunMotor Official Store
$79.35 + free shipping
AliExpress - AliExpress - ND Ebike Factory Store
$59.87 + $60.89 shipping
AliExpress - NBEBIKES Store
Check seller for price* Shipping estimates are for the contiguous US and may vary by location.
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Price History
Current best price $79.35. Over the past 90 days: low $79.35, high $79.35, average $79.35 — about average.
- AliExpress - RisunMotor Official Store
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Specifications
Type
- VESC Based
- No
- Cooling
- Air
Electrical
- Voltage Range
- 36–72V
- Continuous Amps
- 45A
Motor Features
- Regen Support
- No
- Drive Mode
- Sinewave
- Sensor Mode
- Dual Mode
- Field Weakening
- No
- Self-Learning
- No
- Dual Motor Support
- No
- Controller Pairing
- No
Inputs
- Throttle Support
- Yes
- PAS Support
- Yes
Display
- Supports Display
- Yes
- Requires Display
- No
- Protocols
- UART No.2 (S866/Brainpower)
Power Switch
- Supports Power Switch
- Yes
- Requires Power Switch
- No
Programming
- Via Display
- No
- Via Phone
- No
- Via PC
- No
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | Battery + |
| 2 | Black | Battery - |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Yellow | Hall A |
| 4 | Green | Hall B |
| 5 | Blue | Hall C |
| 6 | White | Motor Temp |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | Battery + |
| 2 | Black | Ground |
| 3 | Blue | UART RX |
| 4 | Green | UART TX |
| 5 | Yellow | High Beam |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Green | Throttle Signal |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Yellow | PAS Signal |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Black | Ground |
| 2 | Orange | Brake Signal (Low) |
