SMPS Back EMF Protection Circuit Diagrams & Examples
Protect your switch-mode power supply from voltage spikes caused by inductive loads. These SMPS back EMF protection circuit diagrams show how to safely clamp or divert back EMF from DC motors, conveyor motors, and PLC relay coils, preventing damage to sensitive electronics.
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About these examples.
Whether you're designing industrial controls, motor drives, or automation panels, these examples give you a practical starting point. Each circuit is fully editable — open any example to modify component values, add protection devices, or adapt the layout to your application.
Use the generator below to create your own SMPS back EMF protection circuit diagram in minutes.
Make one yourself.
Select a starter template
Open an SMPS back EMF protection example that matches your load type, such as a DC motor or relay coil.
Add protection components
Place a flyback diode, TVS diode, or RC snubber across the inductive load to clamp back EMF spikes.
Wire the SMPS and load
Connect the switch-mode power supply output to the protected load, ensuring the protection device is in parallel with the coil.
Label and export
Add voltage ratings, part numbers, and notes, then export the circuit diagram as an image or PDF.
Frequently asked questions
What is the best way to protect an SMPS from back EMF?
Can I use a diode for back EMF protection in an SMPS circuit?
Where should the back EMF protection circuit be placed?
Do I need back EMF protection for PLC relay coils?
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