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The product is intended for specialists and requires qualified and authorized personnel. The product does not include assembly/use instructions . Putting the product into operation by unqualified persons leads to the loss of the warranty according to the Terms and Conditions on the site.
The specified technical parameters (current, power, etc.) represent maximum allowable values under ideal operating conditions. For safe use and optimal lifespan, it is recommended to operate the product continuously at no more than 50% of the specified maximum values.
Reverse polarity protection module, MOSFET, 3–28V, 12A
Protects equipment quickly against reverse power connection, using a MOSFET with minimal losses. It operates between 3 and 28 VDC, supports up to 12A continuous, offers a very low voltage drop below 50 mV, and an ultra-fast response under 1 us. Its compact 12x22 mm size makes it easy to integrate into projects with batteries, DC power supplies, and development boards.
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The reverse polarity protection module is a compact and efficient solution for protecting sensitive electronic equipment against incorrect power supply connection.
Based on a power MOSFET transistor with an extremely low internal resistance, below 5 mΩ, the module introduces a negligible voltage drop in the circuit, below 50 mV at maximum load, which practically eliminates energy losses and the risk of overheating.
It operates over a wide voltage range, from 3 to 28 VDC, and supports a continuous current of up to 12 A, with peaks of up to 15 A, making it suitable for both medium-power applications and more demanding circuits. The response time of under 1 μs ensures instant protection: when the polarity is connected correctly, current flows freely to the load, and if the terminals are accidentally reversed, the module completely blocks current flow, preventing any damage to downstream components.
Thanks to its compact 12 x 22 mm size, it can be easily integrated into any project, regardless of available space. The module is compatible with any DC power supply within the specified voltage range, including batteries, rechargeable cells, solar panels, or laboratory power supplies, and can be used together with Arduino, ESP32, STM32 development boards, or any other electronic platform that requires reverse polarity protection.
Specifications:
Operating voltage: 3 – 28 VDC
Maximum current (continuous): 12 A
Peak current: 15 A
Voltage drop at maximum load: < 50 mV
MOSFET internal resistance: < 5 mΩ
Response time: < 1 μs
Dimensions: 12 x 22 mm
Layout:
| Pin | Signal | Description |
|---|---|---|
| B+ | Input + | Battery / power supply positive |
| B- | Input - | Battery / power supply negative |
| V+ | Output + | Protected output positive |
| V- | Output - | Protected output negative |
Usage:
Connect the positive terminal of the power supply (battery, rechargeable cell, solar panel) to pin B+ and the negative terminal to pin B-.
Connect the load (the circuit that needs to be protected) to terminals V+ and V-, respecting polarity.
Check the connections before powering the circuit.
When connected correctly, the module allows current to pass freely to the load with no intervention.
In the event of accidental reversal of the power supply polarity, the module automatically blocks the current, protecting the load connected at the output.
No additional configuration is required; the module operates passively, without external components.
Dimensions diagram:
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
