Overview
What are IGBT Modules?
Insulated Gate Bipolar Transistor (IGBT) modules are high-efficiency power semiconductors used as electronic switches in power electronic circuits. By combining the simple gate-drive characteristics of MOSFETs with the high-current and low-saturation-voltage capability of bipolar transistors, IGBTs are the industry standard for medium-to-high power applications. In industrial automation, these modules are the "muscle" inside motor drives, responsible for converting DC bus voltage into the pulse-width modulated (PWM) AC output that controls motor speed and torque.
Main Manufacturers
Palm Parts Solution specializes in high-reliability power semiconductors from Mitsubishi Electric, a global leader in IGBT technology. Mitsubishi modules are renowned for their low loss, high thermal cycling endurance, and integrated protection features. We stock various generations of Mitsubishi technology, ranging from classic H-Series to the latest 7th Gen NX-Series modules.
Typical Applications
IGBT modules are critical components in any system requiring precise power conversion and motion control:
- Variable Frequency Drives (VFDs): Power stages for industrial AC drives like the Mitsubishi FR-A800 or generic inverter stacks.
- Servo Amplifiers: High-speed switching in Mitsubishi MELSERVO systems and other precision motion controllers.
- Renewable Energy: Inverters for solar string arrays and wind turbine power converters.
- Uninterruptible Power Supplies (UPS): High-speed switching for clean sine-wave generation in backup power systems.
- Welding Equipment: High-frequency inverter power sources requiring rugged switching capabilities.
Selection Guide
When selecting a replacement IGBT module or specifying one for a new design, consider the following technical parameters:
- Voltage Rating (Vce): Ensure the collector-emitter voltage rating exceeds the DC bus voltage plus a safety margin for inductive spikes (e.g., 1200V modules for 480V AC systems).
- Current Rating (Ic): Match the continuous collector current to the load requirements, accounting for thermal derating.
- Circuit Configuration: Determine if the application requires a single switch, a half-bridge (2-in-1), a H-bridge, or a 6-in-1 (six-pack) configuration for three-phase inverters.
- Package Style: Identify the physical footprint (e.g., Dual, NX, or IPM packages) to ensure compatibility with existing heatsinks and busbars.
- Switching Speed: Evaluate the turn-on and turn-off times if the application operates at high frequencies (>15kHz) to minimize switching losses.
37 products
Frequently asked questions
What is the difference between an IGBT and a Power MOSFET?
IGBTs combine the high input impedance of a MOSFET with the high current-handling and low saturation voltage of a Bipolar Junction Transistor (BJT). This makes them ideal for high-voltage (600V+) and high-current applications where MOSFETs would be too inefficient.
What are the standard voltage and current ratings for Mitsubishi IGBTs?
Standard modules are rated for 600V, 1200V, or 1700V. For high-power industrial applications, current ratings typically range from 50A to over 1000A per module. Always consider the safe operating area (SOA) and peak surge current when sizing.
Can I replace an Infineon or Semikron module with a Mitsubishi IGBT?
Yes, many Mitsubishi Electric modules (such as the NX series) have industry-standard footprints that are physically compatible with Infineon EconoPACK or Semikron SEMITRANS modules. However, you must verify gate charge (Qg) and switching characteristics to ensure the existing gate driver can handle the replacement.
What causes IGBT modules to fail in a VFD?
Excessive heat is the primary cause of failure. This is often due to insufficient thermal paste, loose mounting screws, or cooling fan failure. Electrical failures are usually caused by overvoltage transients (Vce spikes) or short circuits in the motor windings.
What is the difference between a standard IGBT module and an IPM?
An Intelligent Power Module (IPM) includes the IGBT power stage plus integrated gate drive circuitry, protection logic (over-current, over-temperature, under-voltage), and diagnostic outputs. A standard IGBT module requires an external gate driver board to function.