Jefftron Mosfet – V3 combines an extremely compact mosfet directly with Version 3 mechanical switch contacts, allowing the mosfet to be installed entirely inside the gearbox with ease. The circuit prevents arcing that occurs in traditional mechanical trigger systems, which eventually leads to carbonized contact surfaces. It reduces the electrical resistance compared to a mechanical switch, allowing the motor to draw more power from the battery. Lower resistance makes the electrical system more efficient, resulting in higher rate of fire and reduced trigger response time.
The package includes suitable connectors for the motor and fuse, as well as heat shrink tubing. In addition, a highly conductive T-connector (Deans) is included for battery connection. The connectors are separate and require soldering to the wires during installation. In the wired version, the wires connected to the circuit itself are pre-soldered to simplify assembly.
Specifications:
– Mosfet integrated with SHS-manufactured V3 switch contacts
– Easy to install in all Marui V3-compatible gearboxes
– Pre-soldered wires on the circuit for easier assembly. NOTE! Battery, motor, and fuse connectors are not pre-installed!
– Circuit coated with a transparent varnish for moisture protection.
– Designed to withstand up to 75A current spikes and 25A continuous current. For heavy builds, we recommend the JeffTron Mosfet II circuit.
– Compatible with all batteries up to 17 V (Ni-xx 8.4V – 14.4V, LiPo 7.4V – 14.8V, LiFe 9.9V – 13.2V)
CIRCUIT MANUAL: You can download the English manual here
WARNING! Installation should be performed by a professional who can make high-quality solder joints and is experienced in repairing airsoft guns! Poor soldering and connections increase the load on the circuit and may cause damage.

