8x MOSFET-SOP8 - IoTextra MOSFET2
8-channel N-channel MOSFET switch module · galvanic isolation · PWM capable · up to 90 VDC / 9 A
GPIO and/or I²C modes · HOST and Qwiic connectors · 47×56 mm · 5 VDC supply
Works with Raspberry Pi, Raspberry Pi Pico / Pico 2 (RP2040 / RP2350) and ESP32
DIN-rail mounting: A 3D-printable DIN-rail mounting tray is available — view on Printables
Part of the IoTextra series · compatible with IoTsmart and IoTbase · Open Hardware
The IoTextra MOSFET2 provides eight independent N-channel MOSFET switch channels organized into two isolated 4-channel groups. Each group has its own dedicated isolated DC-DC converter and 4-channel optocoupler. Designed for high-speed, high-current DC load switching with full galvanic isolation — ideal for PWM motor control, solenoid valves, LED dimming, and industrial automation.
Hardware Synergy: The module is compatible with both IoTsmart and IoTbase series.
Software Power: This hardware compatibility unlocks the full potential of the IoTflow platform, with native support for Tasmota as well. It enables you to:
- Create custom Node-RED nodes effortlessly.
- Run Tasmota firmware for reliable MQTT-based telemetry and channel state reporting.
- Integrate via MQTT with third-party global platforms like Blynk.
- Scale your project from a single node to a complex industrial network.
MOSFET Variants
| Vds max |
Id max |
RDS(on) |
| 90 V |
6 A |
< 20 mΩ |
| 60 V |
7 A |
< 20 mΩ |
| 30 V |
9 A |
< 20 mΩ |
Key Specifications
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Supply voltage: 5VDC, feeding an onboard 3.3V regulator for the logic section
-
Logic level: 3.3V; logic "1" (2.5–5V) = MOSFET off, logic "0" (0–1.1V) = MOSFET on
-
Control interface: GPIO (AP0–AP7) via HOST-P, or I²C via TCA9534 (or compatible)
-
I²C addressing: DIP-switch (A0–A2), up to 16 modules on one bus
-
Hybrid control: some channels via HOST-P GPIO, others via the I²C expander, simultaneously
-
Connectors: HOST-P10 or HOST-P12, Qwiic × 2, PWR, H1–H4 terminal blocks
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DC-DC converter: 5V→5V or 5V→12V, low-profile or standard, ×1 or ×2, isolated per group
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Status indication: 8× channel status LEDs, plus 3.3V power LED
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Protection: Reverse polarity, ESD (TVS on Qwiic), transient suppression
-
Size: 47 × 56 mm, with mounting holes for base-module or Raspberry Pi installation
Operation Modes
🔌 Standalone
MOSFET control is available through the HOST connector, or via the I²C bus using the onboard I/O expander.
🧠 Smart
An IoTsmart module is inserted vertically into the HOST connector. MOSFET control and the 5V module supply are provided through HOST, powered from the IoTsmart module.
🏗 Mezzanine
The module is installed into an IoTbase carrier board. MOSFET control and the 5V module supply are provided through HOST.
Applications
🏭 Industrial Automation (Drive and Valve Control)
High-speed PWM control for DC motor speed and heating element intensity; solenoid valve dosing with zero mechanical wear.
🔔 IIoT (Status Indication and Alerting)
8 channels drive extensive LED panel networks, high-power sounders, and signal towers. Low RDS(on) keeps heat minimal in enclosed cabinets.
🌱 Smart Farming (Greenhouse and Irrigation Automation)
High-power LED grow lights with smooth sunrise/sunset dimming; micro-drip irrigation pumps at up to 90V DC.
🏠 Smart Home (Ambient Lighting and Access Control)
Multi-channel high-power RGBW strip dimming and electromagnetic lock control — completely silent, no relay click.
