BIGTREETECH EBB36 / EBB42 CAN Extruder Breakout Board

Klipper Hotend HeadTool with CANBUS & USB-C Support

🔧 Overview

The EBB36 / EBB42 is a nozzle adapter breakout board purpose-built for 36 and 42 size extruder stepper motors. It communicates via USB-C or CAN bus, drastically simplifying toolhead wiring on Klipper-based 3D printers. Available in CAN, GEN2, and MAX31865 (PT100/PT1000) variants, plus the companion U2C 2.1 USB-to-CAN bridge module.

⭐ Key FeaturesOnboard TMC2209 Driver

UART-controlled stepper driver built directly onto the board for quiet, reliable extruder motion.

CAN Bus or USB-C

Flexible communication options with selectable 120R terminal resistor via jumper cap.

PT100/PT1000 Support (MAX31865 variant)

Onboard MAX31865 supports 2-wire or 4-wire PT100/PT1000 for high-temperature hotends.

Built-in Protection Circuits

Thermistor leakage protection, anti-flyback diodes, reverse-polarity protection, and ESD-protected USB port.

ADXL345 Accelerometer

Onboard sensor supports Klipper input shaper resonance testing.

DIY-Friendly Design

Includes terminals, female reeds, double-way studs and screws for easy wiring.

📦 Choosing Your Option

EBB36 CAN / EBB42 CAN: Standard CAN bus breakout board for 36 or 42 size extruders.
EBB36 GEN2 / EBB42 GEN2: Second-generation revision of the respective board.
EBB36 With MAX31865 / EBB42 With MAX31865: Adds onboard PT100/PT1000 high-temp sensor support.
U2C 2.1: USB-to-CAN bus adapter module for connecting your main board or host (e.g. Raspberry Pi) to CAN bus devices like the EBB36/EBB42.
1PC / 2PCS: Quantity of the selected board only, packaging and cables are not included unless pictured.

📋 SpecificationsMicroprocessorARM Cortex-M0 STM32F072C8T6, 48MHzMotor DriverOnboard TMC2209 (UART mode)CommunicationCAN bus, USB-CInput VoltageDC 12-24V, up to 9ALogic VoltageDC 3.3VOnboard SensorADXL345 accelerometerMax Heater Output Current5AFirmwareKlipper onlyDimensions51.5mm x 37mm🖼️ Product Images❓ FAQDoes this board work with Marlin firmware?

No, this board currently only supports Klipper firmware.

What's the difference between CAN and GEN2 versions?

GEN2 is a newer hardware revision of the same board. Both support CAN bus and USB-C communication.

Do I need the U2C module?

Only if your main controller does not already have a native CAN bus interface. The U2C converts a USB port into a CAN bus connection.

Can this read PT100 temperature probes?

Only the MAX31865 variant supports PT100/PT1000 sensors directly; standard versions use NTC thermistors.