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.
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.
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Logic level: 3.3 V (onboard regulator)
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Logic "1" (MOSFET off): 2.5 – 5 V
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Logic "0" (MOSFET on): 0 – 1.1 V
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Control interface: GPIO (AP0–AP7) via HOST-P, or I²C via TCA9534
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I²C address: Configurable via DIP switch (A0–A2), up to 16 modules per bus
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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
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Indicators: 8× channel status LEDs + 3.3V power LED
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Protection: Reverse polarity, ESD (TVS on Qwiic), transient suppression
Operation Modes
⎯ Standalone
Control via HOST-P10/P12 cable or Qwiic I²C connectors from any host.
⎙ Smart
Insert an IoTsmart module (ESP32-S3, RP2350, RP2040, XIAO) vertically into HOST-P12.
▭ Mezzanine
Install into an IoTbase carrier board (PICO, Nano) for expanded system integration.
Applications
⚙
Industrial Automation
PWM control for DC motors and VFDs; solenoid valve switching with zero mechanical wear. Use with Node-RED or IoTflow for PID control loops.
🌿
Smart Farming
High-power LED grow lights with sunrise/sunset dimming; pump control for micro-drip irrigation. Supports up to 90V DC equipment.
🔴
IIoT Status & Alerting
8-channel control of LED panels, sounders, and signal towers. Low RDS(on) keeps heat minimal in enclosed cabinets. Works with Tasmota and MQTT.
🏠
Smart Home
RGBW strip dimming and electromagnetic lock control. Completely silent operation — no relay clicks. Integrates with Home Assistant.
