Bonitron Braking Transistors are used with AC drives to allow full power braking and eliminate overvoltage faults. This permits controlled braking and dramatically shortens motor stopping time. Our transistors monitor the DC bus, and if overvoltage occurs, the Bonitron Transistor shunts the excess energy through a resistive load bank to prevent overvoltage faults. Click "Resistors" above to learn more about Bonitron Resistive Load Banks.

• Up to 1600A / 2300hp per unit
• Master / Slave capability
• Up to 100% duty
• Communication Options
  • Ethernet IP, Profibus DP, Extended I/O
    
    

• Up to 600A / 600HP
• Up to 20% duty
• Ideal for drives with no internal brake or 7th IGBT

• Up to 10A / 10HP
• Up to 20% duty
• Ideal for drives with no internal brake or 7th IGBT
  

Whether you're buying a reputable Bonitron Transistor or using your drives' internal brake, there's no need to go anywhere other than Bonitron - we're your one stop shop! Below is our selection of resistors rated up to the megawatts. Need a custom resistor? We do those too!

• Up to MegaWatts
• Standard 10%, 50%, and 100% continuous duty selection
• Custom resistors available
• Convection or fan cooled options
• Fan cooled units offer maximum wattage dissipation with a minimal footprint

• Up to 33hp
• Up to 20% duty
• Vertically mountable

M3452 Complete Braking Kit

Like separate transistor and resistor options, the M3452 Complete Braking Kit works with VFDs to monitor the DC bus. If overvoltage occurs, the M3452 Complete Braking Kit shunts the excess energy through an internal braking resistor to prevent overvoltage faults. Since the resistor is already installed internally, installation time is reduced, while production uptime is increased.

• Up to 43hp
• Up to 20% duty
• Convenient enclosure
• Quick installation

Bonitron's signature solution, the Line Regen, continues to advance with two new series.

When variable speed drive systems are braking, they generate power that must be dissipated. If the excess energy is not dissipated, the drive system can lose control of the process due to an overvoltage trip, or must extend the braking time to keep from overpowering the drive.

• 20A Continuous
• 30A for 60 Seconds
• 208 - 480VAC | 50Hz/60Hz
• Status LED
• > 99% efficient
• External fusing

• 30A - 100A Continuous
• 45 - 150A for 60 Seconds
• 208 - 600VAC | 50Hz/60Hz
• Status LEDs or interactive digital display with event logging
• > 99% efficient
• External fusing

Instead of dissipating the excess energy as heat in a resistor, a Line Regen returns this energy to the power grid efficiently, with minimal heat loss, allowing the entire braking system to be installed in the drive cabinet. This reduces installation footprint and facility cooling costs.

Multiple units can be added to cover higher current ratings (consult Bonitron for over two).

The M3345 Series has stood as the test of time and proven itself the Line Regeneration work horse for over two decades. Bonitron took the efficiency and reliability of the M3345 and improved it for its latest releases, the M3346 and M3645 Series.

M3345 Series Line Regens are currently still offered for legacy applications, however the increased features and benefits with the M3346 and M3645, make them the preferred solution.

• 10 - 55A Continuous
• 10 - 90A for 60 Seconds
• 208 - 480VAC | 50Hz or 60Hz
• Status LED
• Analog meter
• > 95% efficient
• Internal fusing

The M3539 protects devices connected to the DC bus. If the DC bus voltage reaches a predetermined point, such as 1500VDC, the M3539 SCRs will limit the voltage from going any higher and shunt the energy through the field resistance.

Once the current drops below the M3539 SCR threshold, the unit turns off and prepares for the next spike. Multiple SCRs allow parallel load resistor connections.

• Up to 1500VDC / Up to 1800A
• Simple integration
• Protect devices connected to the DC bus from high DC bus voltage

• Up to 150A
• Increased safety - EN-954 Class I or II
• For servo motion control systems
• Simple installation