Littelfuse — Low-Voltage Industrial Motor Drives and Soft Starters

End-to-End Protection for Motor Drive Systems

Input Protection and Power Conditioning
Littelfuse fuses and fuseholders provide critical first-line defense against overloads and short circuits, helping prevent catastrophic equipment failure while maintaining compact system design. MOV technologies add surge protection against lightning-induced and transient overvoltages.
 

Power Conversion and Rectification
Rectifier diodes, diode modules, and high-power stacks support efficient AC-to-DC conversion with improved thermal performance, low leakage, and high commutation robustness—supporting stable motor drive operation under variable load conditions.
 

DC Bus and Energy Management
IGBT modules and chopper solutions regulate braking energy and stabilize DC bus voltage, improving system control while reducing stress on downstream components in dynamic motor applications.
 

Inverter and Switching Stages
Advanced IGBT modules, SiC MOSFETs, and HV MOSFET technologies enable high-efficiency switching with reduced losses, low EMI, and high-speed performance. These solutions are optimized for compact, high-power-density motor drive designs.
 

Gate Drive and Control
Gate driver ICs ensure precise switching of IGBTs and SiC devices, enabling fast turn-on/turn-off performance, improved efficiency, and enhanced system protection in power conversion stages.
 

Sensing, Thermal Monitoring, and Diagnostics
NTC sensors provide accurate thermal feedback for semiconductor monitoring, improving system safety and enabling predictive control strategies in soft starter and drive applications.
 

System Interfaces and Auxiliary Control
Industrial-grade switches support configuration, mode selection, and system control functions, offering high reliability and long electrical life in harsh environments.

Benefits Improved system protection against overloads, surges, and short circuits Higher efficiency through optimized power conversion and switching Enhanced thermal stability and real-time temperature monitoring Reduced system downtime with robust, field-replaceable components Compact, high-power-density designs for modern industrial equipment Increased reliability across AC drive and soft starter architectures

By integrating protection, sensing, and power control technologies across the full motor drive architecture, Littelfuse enables engineers to build safer, more efficient, and more resilient industrial systems—from startup through full-speed operation and shutdown cycles.