The High Current Heated Bed Power Module (MOS25) is a dedicated external MOSFET driver designed to deliver stable, safe, and high-power performance for 3D printer heated beds. It eliminates the risk of overheating commonly found in onboard MOSFETs of RepRap, RAMPS, and other controller boards, preventing thermal runaway issues and ensuring long-term reliability. Built with a powerful HA210NO6 MOSFET, this module provides efficient switching, reduced heat generation, and consistent PID-controlled temperature stability. Ideal for Ender, CR, Prusa, Anet, and all DIY 3D printers using 12V or 24V heated beds.

Features:

• High-power MOSFET module designed for 3D printer heated beds

• Replaces onboard MOSFETs that overheat or cause thermal runaway

• Built using the HA210NO6 high-current MOSFET for stable performance

• Supports 12V and 24V heated bed systems

• Handles up to 25A current and much higher loads with proper cooling

• Ensures precise PID temperature control (unlike DC relays)

• Prevents excessive heating of the mainboard and extends its lifespan

• Easy installation with dedicated input signal cable

• Large PCB design for better heat dissipation

• Mounting holes for secure installation on printer frames

How to Use:

• Connect the module input to the heated bed port on the mainboard

• Connect the heated bed wires directly to the MOSFET output terminals

• Connect your power supply (12V or 24V) to the module input terminals

• Ensure wiring polarity is correct

• Secure the module using M3 screws through the mounting holes

• After installation, run a test heating cycle and confirm stable temperature control

• Ensure proper airflow or active cooling for high-current usage

Application Instructions:

• Suitable for heated beds drawing high current (10A–25A range)

• Recommended for printers with large heatbeds or aftermarket upgrades

• Prevents mainboard MOSFET overheating on RAMPS, MKS, SKR, Creality boards

• Can also be used for high-current DC load switching (other electronics projects)

• Use with active cooling for maximum rated current stability

• Keep wiring tight to reduce resistance and heating

Safety Instructions:

• Do not exceed the recommended operating current without cooling

• Ensure all power connections are secure and insulated

• Keep the module in a well-ventilated location

• Avoid touching terminals while powered

• Verify voltage compatibility (12V or 24V) before installation

Specifications:

• Type: Heated Bed Power Module / MOSFET Controller

• MOSFET Model: HA210NO6

• Rated Current: 25A

• Maximum Current with Cooling: 210A

• Operating Voltage: 12V–24V

• PCB Size: 59mm x 48mm

• Mounting Hole Diameter: 3.2mm (for M3 screws)

• Hole Spacing: 54mm x 43mm

• Control Method: PID-compatible MOSFET switching

• Stable Operation Condition: I(max)=2 (must not exceed 2 under continuous load)

• Includes: Input signal cable

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