10pcs Reverse Polarity Protection Module 3-14V 4A PCB

10-Pack Reverse Polarity Protection Module – 3V to 14V, 4A

Keep your electronics and DIY projects safe with this compact Reverse Polarity Protection Module. Designed for a wide voltage range of 3V to 14V and a maximum output current of 4A, this PCB module instantly guards against accidental reverse connections that can damage sensitive components. Perfect for hobbyists, engineers, and DIY enthusiasts who need a reliable safeguard in their power supply circuits.

Key Features

• Wide Voltage Compatibility: Operates across 3V–14V, making it versatile for a broad range of electronics projects and battery-powered applications.
• 4A Output Current: Handles up to 4 amps, suitable for most low- to mid-power electronic circuits.
• LED Status Indicator: A warning LED activates when the positive and negative poles are incorrectly connected (reversed), giving you an immediate visual alert — the LED stays off during normal operation.
• Ultra-Low Internal Resistance: Just 15mΩ internal resistance minimises power loss and heat generation.
• Compact PCB Design: Measures approximately 1.35 × 0.75 cm (0.53 × 0.3 in), fitting easily into tight spaces on your circuit boards or project enclosures.
• Pack of 10: Great value — includes 10 identical modules so you always have spares on hand.

Who Is This For?

This module is ideal for electronics enthusiasts, hobbyists, DIYers, and professional engineers who want a reliable, drop-in solution to prevent reverse connection faults that could disrupt or destroy their circuits. Excellent for battery charging setups, DIY power supplies, automotive electronics, and general electronic prototyping.

Specifications

Package Includes

• 10 × Power Reverse Protection Module (PCB)

Made in China Mainland.

Note: Please allow ±1–2 cm measurement tolerances due to manual measurement methods. Colours may vary slightly from images due to monitor calibration differences.

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Frequently Asked Questions

Q: What does a reverse polarity protection module do?

A: A reverse polarity protection module prevents electrical current from flowing in the wrong direction through your circuit. If power connections are accidentally reversed, the module blocks the reverse current and activates a warning LED, protecting your components from potential damage.

Q: What voltage and current does this protection module support?

A: This module supports an input voltage range of 3V to 14V and a maximum output current of 4A, making it suitable for a wide variety of low- to mid-power electronics projects and battery-powered applications.

Q: How does the LED indicator work on this module?

A: The onboard LED lights up as a warning signal when the positive and negative poles are connected incorrectly (reversed). During correct, normal operation, the LED remains off, so you can instantly tell whether your polarity is correct at a glance.

Q: Can I use these modules in automotive or battery charging projects?

A: Yes. With a working voltage range of 3V–14V, these modules are well-suited for automotive electronics, battery charging circuits, DIY power supplies, and general electronic prototyping where reverse connection protection is needed.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.