Braking Transistor Products
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. Bonitron transistors monitor the DC bus, and if overvoltage occurs, the transistor shunts the excess energy through a resistor to prevent overvoltage faults.
The M3675T shown below is rated for lower-current applications in 110–480VAC configurations. For the full range of sizes, see our complete line of Braking Transistors, or use our How to Size a Braking Transistor guide to find the right rating for your application.
Showing 49–60 of 109 resultsSorted by popularity
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M3452-U200LK6-R7
$4,016M3452-U200LK6-R7
BRAKING TRANSISTOR. 230-240VAC. 375VDC. 200/200A 1.9 Ohms Min. (110-120VAC Control). R7 Option
$4,016 -
M3452-U200HK6-R7E
$4,334M3452-U200HK6-R7E
BRAKING TRANSISTOR. 460-480VAC. 750VDC. 200/200A 3.8 Ohms Min. (110-120VAC Control). R7E Option
$4,334 -
M3452-U200HK6-R7
$4,016M3452-U200HK6-R7
BRAKING TRANSISTOR. 460-480VAC. 750VDC. 200/200A 3.8 Ohms Min. (110-120VAC Control). R7 Option
$4,016 -
M3452-U200CK6-R7E
$4,334M3452-U200CK6-R7E
BRAKING TRANSISTOR. 575-600VAC. 940VDC. 200/200A 4.7 Ohms Min. (110-120VAC Control). R7E Option
$4,334 -
M3452-U200CK6-R7
$4,016M3452-U200CK6-R7
BRAKING TRANSISTOR. 575-600VAC. 940VDC. 200/200A 4.7 Ohms Min. (110-120VAC Control). R7 Option
$4,016 -
M3452-U1600HT10-R7E
$20,766M3452-U1600HT10-R7E
The Bonitron M3452-U1600HT10-R7E is a heavy-duty braking transistor designed for high-horsepower 460–480 VAC variable frequency drive applications. Rated for up to 1600 A peak braking current, this unit monitors the VFD DC bus and directs excess regenerative energy to an external braking resistor when bus voltage rises. This controlled dissipation helps prevent DC bus overvoltage faults while providing faster, more predictable motor stopping. The M3452-U1600HT10-R7E uses 120 VAC control power and features the R7E control option for enhanced system status, diagnostics, and control capabilities. With a 750 VDC braking setpoint and 0.47-ohm minimum braking resistance, this configuration is suited for demanding regenerative loads requiring high-current dynamic braking and reliable overvoltage management.
$20,766 -
M3452-U1600HT10-R7
$20,449M3452-U1600HT10-R7
The Bonitron M3452-U1600HT10-R7 is a 1600 A heavy-duty dynamic braking transistor built for high-power 460–480 VAC variable frequency drive systems. Designed to monitor the VFD DC bus, the M3452 activates when regenerative energy causes bus voltage to rise, routing that excess energy through an external braking resistor to help prevent overvoltage faults and shorten motor stopping times. This model supports up to 1600 A peak and 1200 A RMS braking current with a 750 VDC braking setpoint and 0.47-ohm minimum resistance. The R7 control configuration provides hardwired enable, fault reset, master/slave control, and system status outputs, making this unit well suited for large industrial drive applications requiring high-current regenerative braking and straightforward external control.
$20,449 -
M3452-U1600HM14-R7E
$17,568M3452-U1600HM14-R7E
The Bonitron M3452-U1600HM14-R7E is a high-current dynamic braking transistor designed for large 460 VAC variable frequency drive systems that generate significant regenerative energy. Rated for 1600 A peak and 1200 A RMS braking current, this M14 configuration monitors the drive DC bus and switches excess energy to an external braking resistor when voltage rises above the braking threshold. By controlling regenerative energy during rapid deceleration or overhauling loads, the unit helps reduce DC bus overvoltage trips and supports consistent motor stopping performance. The M3452-U1600HM14-R7E uses 120 VAC control power, a 750 VDC braking setpoint, and a 0.47-ohm minimum braking resistance. Its R7E control configuration adds enhanced monitoring and diagnostic capability for demanding industrial VFD applications.
$17,568 -
M3452-U1600HM14-R7
$17,249M3452-U1600HM14-R7
The Bonitron M3452-U1600HM14-R7 is a heavy-duty dynamic braking transistor designed for high-horsepower variable frequency drive systems that require dependable control of regenerative energy. This 1600 A M14 configuration monitors the VFD DC bus and switches excess energy to an external braking resistor, helping prevent DC bus overvoltage faults during deceleration, stopping, or overhauling operation. Rated for 1600 A peak and 1200 A RMS braking current, the unit supports a minimum braking resistance of 0.47 ohms and uses 120 VAC control power. The standard R7 control board provides a straightforward control platform for demanding industrial braking applications, while the open-chassis M14 construction is designed to accommodate the high-current requirements of large drive systems.
$17,249 -
M3452-U1600CT10-R7E
$20,766M3452-U1600CT10-R7E
The Bonitron M3452-U1600CT10-R7E is a heavy-duty dynamic braking transistor engineered for high-power 575–600 VAC variable frequency drive systems. Designed for applications that produce substantial regenerative energy, this 2015 HP peak configuration monitors the VFD DC bus and diverts excess energy through an external braking resistor to help prevent overvoltage trips and improve controlled stopping. The T10 chassis supports 1600 A peak and 1200 A RMS braking current at a 75% duty cycle, with a 940 VDC braking setpoint and 0.58-ohm minimum resistance. Its R7E control board provides extended I/O for additional status and diagnostic functions, making this model a strong fit for demanding industrial VFD applications requiring high-current braking and enhanced system monitoring.
$20,766 -
M3452-U1600CM14-R7E
$17,568M3452-U1600CM14-R7E
The Bonitron M3452-U1600CM14-R7E is a high-current braking transistor designed for large 575–600 VAC variable frequency drive applications that require controlled management of regenerative energy. When the VFD DC bus rises during deceleration or overhauling operation, the unit switches excess energy into an external braking resistor to help limit bus voltage and reduce overvoltage trips. This M14 configuration is rated for 1600 A peak and 1200 A continuous current, with a 940 VDC braking level and 0.58-ohm minimum resistance. Designed for drive systems up to 2015 HP, this model also incorporates the R7E control option, making it well suited for demanding industrial applications that require high-capacity dynamic braking and additional system monitoring capability.
$17,568 -
M3452-U1600CM14-R7
$17,249M3452-U1600CM14-R7
The Bonitron M3452-U1600CM14-R7 is a heavy-duty braking transistor designed for 575–600 VAC variable frequency drive systems requiring high-capacity regenerative energy control. Rated for 1600 A peak and 1200 A RMS braking current, this M14 open-chassis model monitors the VFD DC bus and transfers excess energy to an external braking resistor when voltage rises during deceleration or overhauling operation. Its 940 VDC braking level and 0.58-ohm minimum resistance support demanding industrial applications where reliable dynamic braking is essential. The standard R7 control board provides a straightforward hardwired control platform, while the high-current M14 construction makes this configuration well suited for large drive systems that need controlled stopping and protection from DC bus overvoltage faults.
$17,249