is it protected against flyback current from an inductive load?

No it's not protected against flyback current.

If I’m using this with Arduino do I still need to add diode to protect the micro controller?

Whether to add diode to protect the micro controller, depending on the operating voltage of the micro controller. For example , if the maximum working voltage of the micro controller is small, such as 7V, 8V, input 12V during micro controller operation may cause damage, then I suggest you Add a diode. If the maximum operating voltage of the micro controller is 36V, then you don‘t need to add a diode. Of course, if you need one more protection, you can add a diode directly. The input and output parameters of this board are: Input control voltage: 3.3V-12V, Output voltage: 5-36V.

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NOYITO Low Voltage MOSFET Switching Module 3V 5V Low Control High Voltage 12V 24V 36V Field Effect Transistor Module

Product ID: 359016135

Details

Specific uses for product
Electronic
Connector type
Pins
Colour
BLACK
Item dimensions L x W x H
42 x 26 x 12
Brand
NOYITO

⚡Input Voltage: 3.3V-12V

🔌Output Voltage: 5-36V

🛡️Optical Isolation: Complete Separation

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Description

🔧 Elevate Your Electronics Game!

SAFETY FIRST - Optical isolation ensures complete separation for peace of mind.
EFFICIENT CONTROL - Minimal control current of just 1-5mA for energy efficiency.
USER FRIENDLY DESIGN - Simple 2-pin control for effortless integration.
POWER UP YOUR PROJECTS - Seamlessly control high voltage with low input.
VERSATILE VOLTAGE RANGE - Adaptable output from 5V to 36V for diverse applications.

The NOYITO Low Voltage MOSFET Switching Module is a versatile and efficient solution for controlling high voltage applications with a low control voltage. With an input range of 3.3V to 12V and an output range of 5V to 36V, this module features optical isolation for enhanced safety and a user-friendly 2-pin control design, making it ideal for both hobbyists and professionals.

Specifications

Input Voltage	12 Volts
Current Rating	5 Amps
Power Plug	No Plug
Connector Type Used on Cable	Pins
Number of Ports	1
Unit Count	1.0 Count
Number of Items	1
Item Weight	10 Grams
Package Quantity	1
Item Dimensions	1.65 x 1.02 x 0.47 inches
Finish Types	Optical
Color	BLACK

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