Motor Controller for Bafang M400 (UART protocol) 36V 14A 250W

Replacement motor controller for Bafang M400 / G330 mid-drive motors with UART communication protocol. This controller is rated for 36V, 14A and 250W and has manufacturer part number CR X10B.250.SN.U 3.0.

Important: Bafang M400 / G330 motors were produced with both UART and CAN communication protocols. This controller is designed for UART systems only and is not compatible with CAN protocol versions. Please check your motor, original controller and connectors carefully before ordering.

Bafang M400 / G330 Controller Specifications

• Manufacturer: Bafang
• Manufacturer part number (MPN): CR X10B.250.SN.U 3.0
• Motor compatibility: Bafang M400 / G330
• Communication protocol: UART
• Voltage: 36V
• Current: 14A
• Power: 250W
• Product type: Replacement motor controller

Bafang M400 UART vs CAN Compatibility

Bafang M400 / G330 motors can use two different communication protocols: UART and CAN. The controllers and connectors used by these systems are different and are not directly interchangeable.

• UART version: usually identified by a "U" marking, a round display connector and a female EB-BUS connector. UART replacement controllers typically do not require calibration.
• CAN version: usually identified by a "C" marking, a triangular display connector and a male EB-BUS connector. CAN controllers are different and may require calibration after replacement.

This product is compatible with the UART version only. If your Bafang M400 / G330 motor uses the CAN protocol, this controller will not fit.

How to Check Compatibility Before Ordering

Bafang controllers can look very similar while having different communication protocols, electrical specifications or connector types. We strongly recommend checking the specifications of your original motor and controller before placing an order.

Please verify the following:

• Your motor is a Bafang M400 / G330.
• Your system uses the UART communication protocol.
• Your system voltage is 36V.
• Your motor is rated at 250W.
• The required controller current is 14A.
• The display connector is the correct type for the UART system.
• The EB-BUS connector matches your existing wiring.
• The manufacturer part number or other markings on your original controller correspond to the required version.

Whenever possible, identify the controller using the part number printed on the original component rather than relying only on its appearance.

Manufacturer Part Number

This controller is identified by Bafang manufacturer part number:

CR X10B.250.SN.U 3.0

When replacing an existing controller, comparing this number with the markings on your original controller can help confirm compatibility.

Not Sure if This Controller Fits Your E-Bike?

If you are unsure whether this Bafang controller is compatible with your e-bike, please contact us before ordering.

For compatibility checking, please send us clear photos of:

• the Bafang motor identification label;
• the original controller and all visible markings;
• the display connector;
• the EB-BUS connector;
• any manufacturer or part numbers visible on the original components.

You can also send the photos and information by email to info@elanusparts.com.

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