---
tags:
  - resource
created: 2025-04-24 12:26
---

## Summary

Notes about the [EPLZON DC 5V-36V 15A 400W MOSFET Transistor Trigger Switch Drive Module](https://www.amazon.com/dp/B09LLR675M) available on Amazon.
## Notes

The article [Dual MOSFET Switch Module – WORTH IT OR NOT? - Codrey Electronics][1] describes the board and it's strengths and shortcomings.

The circuit diagram is shown here:

![[Dual MOSFET Switch Module.png]]

The board has two [AOD4184A MOSFET's][2] in parallel.

Key points to note:

1. The switch is triggered from the J1 pin and grounded on the J4 pin 
2. Power flows through VIN+ to VOUT+ then is actually switched between VOUT- and VIN-
3. Adding the [flyback diode][3] is important for solenoids to prolong the life of the switch
4. It would be a good board to re-design our own version of to include the 2 resistors and the flyback diode that he mentions in the article

>If you use a standard MOSFET, a 3.3V gate signal won't open the "channel" completely. This causes the MOSFET to have a high R_DS(on), meaning it will heat up rapidly, limit the amount of current your load can draw, and potentially burn out.
## References

- [Dual MOSFET Switch Module – WORTH IT OR NOT? - Codrey Electronics](https://www.codrey.com/electronics/dual-mosfet-switch-module)
- [Driving Parallel MOSFETS](https://www.ti.com/lit/ab/slvaf39a/slvaf39a.pdf)
- [Flyback diode - Wikipedia](https://en.wikipedia.org/wiki/Flyback_diode)
- [MOSFET selection for 3.3VDC](https://forum.digikey.com/t/guide-to-selecting-and-controlling-a-mosfet-for-3-3-vdc-logic-applications/42606)
- [AOD4184A datasheet](https://www.aosmd.com/sites/default/files/res/datasheets/AOD4184A.pdf)
- [SIHLR024 datasheet](https://www.vishay.com/docs/91322/sihlr024.pdf)
- [SiHLU024 DigiKey](https://www.digikey.com/en/products/detail/vishay-siliconix/sihlu024-ge3/16397615)
- [FDN337N datasheet](https://www.onsemi.com/pdf/datasheet/fdn337n-d.pdf)
- [AO3400 datasheet](https://www.aosmd.com/res/datasheets/AO3400.pdf)
- [AO3400-202604 datasheet](https://www.goodworksemi.com/wp-content/uploads/2026/03/GK-SOT-23_AO3400-202604.pdf) <- current favorite
- [IRLZ44NPbF datasheet ](https://www.infineon.com/assets/row/public/documents/24/49/infineon-irlz44n-datasheet-en.pdf)  Through hole for better heat dissipation
- [IRLML2502PbF](https://www.infineon.com/assets/row/public/documents/24/49/infineon-irlml2502-datasheet-en.pdf)
- [MOSFET gate resistor](https://www.build-electronic-circuits.com/mosfet-gate-resistor/)
- [YouTube - AO3040 board build](https://www.youtube.com/watch?v=9XFCOGmvo1E&t=230s)

We could increase the 3.3V input signal to 5V using an NPM transistor, as in this circuit:

![[Screenshot 2026-05-30 at 5.58.28 PM.png]]