Airsoft Mosfets ACU and control systems
Airsoft Mosfets and control systems from
Black Talon Concepts
What are Mosfets
In short, a MOSFET ( Metal–Oxide–Semiconductor Field-Effect Transistor )is a transistor that switches electronic signals and power to a device.
In simple terms, a MOSFET is an electronic gate between the trigger and motor in a gearbox. It’s job is to preserve the trigger contacts in your AEG. It does this by regulating the current going from the battery into the trigger assembly. When your trigger is full compressed and full contact is made, the gun will cycle. A MOSFET will not allow you to fire until an electrical circuit is firm and complete. A weak connection creates arcing, which thus creates carbon build-up on your trigger contacts.
Why is this important?
Well batteries don’t give a constant flow or electrical power, it regulates. This regulating can cause carbon build-up on your trigger contacts, which will do two things you really don’t want. 1 – I will cause the contacts to stick periodically which will cause the gun to continuously shoot on full auto even after the trigger is released or in semi-auto, will not let you repeat a shot until the contacts finally release from each other. 2 – It weakens the ability for your contacts to make proper contact allowing you to shoot the gun when the trigger is pulled.
A common myth is that only LIPO (Lithium-Polymer / LiPoly / LifePo) batteries require MOSFETS. The truth of the matter is that a MOSFET is not required on any AEG, simply a recommendation. And honestly it’s a recommendation for any gun with a Lipo battery as well as any gun using any NiMh (Nickel–metal hydride) battery above 8.4v. That is to say, yes a 9.6v NiMh battery will cause carbon build-up on your trigger contacts, though very slow is still very possible.
Now I will say this, a MOSFET does not prevent carbon build-up, but rather minimizes it.
I should also say that there are various types of MOSFETs out there will all types of functions and features, some items are even falsely named MOSFETs. A simply way to know if a component is a true MOSFET is by examining the wiring and connections. MOSFETS have 3 wires AND a MOSFET must be directly connected to the trigger contacts. Mosfets that do not posess those 2 characteristics will NOT regulate current, and thus will NOT properly preserve your trigger contacts. That is to say in-line MOSFETs, are not true MOSFETs, BUT if you were to solder their connections to the trigger assembly, then they could potentially work with the base features of a true MOSFET.