About this item

The D4184 MOSFET Control Module (also known as a Replacement Relay) is a compact and efficient alternative to mechanical relays, optimized for high-current switching tasks. At the heart of the module is a robust 40 V, 50 A N‑channel MOSFET, allowing it to handle substantial loads with ease. The module accepts 3 V or 5 V control signals, making it fully compatible with common microcontrollers and development boards. A key feature is the inclusion of an optocoupler, which isolates the control circuitry from the power section—significantly reducing electrical interference and enhancing system stability. The module supports PWM-based motor speed control, enabling features like high-level start and low-level stop—ideal for motorized applications, solenoid actuation, and other dynamic loads. Measuring roughly 23 mm × 16 mm (some versions up to 33 mm × 16.5 mm), it includes 2 mm mounting holes and flexible connection options—be it soldered pins, terminal blocks, or breadboard-friendly pins. Its streamlined, PCB-mounted design makes it suitable for automation systems, robotics, and embedded projects. In summary, the D4184 MOSFET module delivers reliable, high-current switching with clean isolation, PWM control, and compact versatility—making it an excellent replacement for traditional relays.