Free delivery on orders above Rs 900 | For Enquiry Call/Whatsapp +91 7276757409

Cart

Your Cart is Empty

Back To Shop

Cart

Your Cart is Empty

Back To Shop

Reverse Voltage Protection for 24V Rails

reverse voltage protection for 24V rails

⚠️ The Problem :

 

Reverse polarity on a 24V power rail—often caused by wiring mistakes—can instantly damage sensors, controllers, and other connected devices. Unlike 5V systems, 24V rails carry more energy, so the risk is higher.

 

🛠️ The Solution :

 

To protect your circuit, add a reverse voltage protection circuit using either a Schottky diode or a P-channel MOSFET in series with the input. Diodes are simpler but cause a small voltage drop. For better efficiency, a P-MOSFET configured in a “high-side switch” gives low loss and fast response.

 

💡 Practical Example :

 

Say you’re powering an industrial sensor module with a 24V SMPS. If the power lines are reversed during maintenance, the internal logic ICs could burn out. But with a P-MOSFET like the IRF9540, you can automatically block the current when polarity is reversed.

 

🧮 Sample Calculation :

 

If your circuit draws 1A, a diode with a 0.6V drop causes:

Power loss = V × I = 0.6V × 1A = 0.6W.

A MOSFET with 50mΩ Rds(on) only loses:

P = I² × R = 1² × 0.05 = 0.05W, making it far more efficient.

 

🛒 Product Suggestions :

 

🔗 MOSFET

🔗 Schottky Diode

 

Shop now at SmartXProKits.in
🇮🇳 Support our work and India’s innovation—buy from our Make in India site!

Cart

Your Cart is Empty

Back To Shop
GET DISCOUNT CODE

It will take just few seconds to claim 7% Discount, After Submitting check Email for Coupon code.

    X
    GET DISCOUNT CODE