Mosfet Switch Board

Unlock next-generation versatility in your circuit designs with our redesigned MOSFET Switch Board. Engineered from the ground up, this new board minimizes gate-loop inductance, incorporates a brand-new ultra-fast gate driver, and adds multiple hardware enhancements for high-speed, high-voltage experimentation. Here's how it elevates your circuitry game:

• Ultra-Fast Switching: Featuring a completely new gate driver and optimized low-inductance layout, the board achieves switching speeds below 10 ns (MOSFET- and load-dependent). This makes it ideal for generating extremely sharp impulses, especially when driving inductive loads.
   
• Optimized Low-Inductance Design: The PCB layout has been carefully redesigned to minimize gate-loop inductance, resulting in cleaner transitions, reduced ringing, and improved stability at very high switching speeds.
   
• Isolated Gate Driver: Equipped with an isolated gate driver powered by an onboard DC-DC converter, the control electronics remain electrically independent. This allows the MOSFET to operate at potential differences of up to 2300V relative to the signal source and power supply.
   
• High-Side or Low-Side Switching: The flexible architecture supports both high-side and low-side switching configurations, making the board suitable for a wide range of circuit topologies.
   
• MCU-Ready Logic Input: The input stage supports both 3.3V and 5V logic levels, allowing direct connection to microcontrollers for precise, programmable control without additional level shifting.
   
• Built-In Fuse Protection: An onboard fuse provides additional protection in the event of overcurrent or overvoltage conditions, helping safeguard both the MOSFET and the driver circuitry.
   
• Fan Support for High-Speed Operation: Includes a 12V fan output available via both an XH2.54 connector and a 2-port screw terminal, allowing compatibility with virtually any fan type. For prolonged operation above 1 MHz, we recommend directing airflow onto the board to prevent thermal shutdown.
   
• Impedance Matching: A selectable 50-ohm termination resistor on the input ensures proper impedance matching to standard 50-ohm signal systems.
   
• MOSFET Flexibility: The onboard MOSFET can be easily replaced by the user, while the drain and source connections use heavy-duty screw terminals rated for high current and AWG 10 wire.
   
• High-Frequency Capability: While the achievable switching speed depends on MOSFET gate capacitance and load conditions, the board comfortably supports frequencies above 1 MHz and has been tested at 3 MHz and beyond.
   
• Power Requirements: Operates from a standard 12V supply or battery and includes reverse polarity protection for added robustness.
   
• BNC Connection for Ease: A dedicated BNC connector ensures quick, secure, and low-noise connection to signal generators and laboratory equipment.
   
• Input Signal Specifications: Accepts 0–5V or 0–3.3V square-wave logic signals (into 50 ohm when selected). Negative input voltages must be avoided to protect the gate driver.

Our next-generation MOSFET Switch Board is an essential tool for resonance circuits, pulsed-power systems, and demanding high-voltage applications. With its combination of ultra-fast switching, low-inductance design, MCU compatibility, and enhanced protection features, it is engineered to deliver precision, performance, and reliability.

Technical Specification:

Datasheets for the selectable MOSFETs can be found here: TK125N60Z1 — G3R60MT07D — G3R160MT12D — SCTW40N120G2V — MSC035SMA170B

Standard MOSFETs block current in only one direction due to the body diode's reverse conduction. For AC applications requiring bidirectional current blocking, our Bidirectional MOSFET Switch is the ideal solution.

This product includes a heat sink for TO247-sized MOSFETs and a BNC to hookup wire adapter for easy connection to a Microcontroller Unit (MCU).