JeffTron Micro Active Brake II

Micro Active Brake II by JeffTron

This is a compact MOSFET module designed for installation in electric airsoft guns regardless of gearbox type. It features active motor braking, which stops the piston in its default position after firing. This prevents partial spring tension and increases the durability of internal parts and the spring itself. It also solves the issue of double shots in SEMI mode on high-RoF builds. Installing this unit not only brings a higher rate of fire but also extends battery life, as the MOSFET reduces electrical losses compared to standard wiring. This is a no-wiring version, intended for experienced technicians and professional service. Connection is done via 6 wires (power and signal), which must be soldered according to the included diagram.

Key Features

• Active motor braking uses residual motor energy to stop it
• Trigger contacts stay clean, no idle power draw
• Protects and prolongs life of gearbox internals
• Stronger effect with neodymium motor magnets
• Requires functional cutoff lever and mechanical parts in gearbox

Technical Specifications

• Device dimensions: 27 × 10 × 7 mm
• Max current: 75 A on shot / 25 A continuous (30 s)
• Supported voltage: 8.4–17 V (NiMH, LiPo, LiFe)
• Wiring type: 6-wire (power + signal)
• Designed for: AEG gearboxes
• Braking: Active, via residual motor energy

Package Contents

• Micro Active Brake II (no wiring)
• Shrink tubing
• Printed installation manual

Warning

Installation requires an experienced technician with knowledge of soldering and disassembly of AEGs. Never use a transformer soldering iron! For easier installation, we recommend the version with pre-wired leads.