Industrial applications demand reliable, efficient, and cost-effective power solutions. While IGBT modules have long dominated high-power systems, IGBT discrete devices are now gaining traction. Their flexibility, lower cost, and improved thermal performance make them ideal for many industrial uses. This article explores why IGBT discrete solutions are becoming popular in factories, motor drives, and power supplies. We’ll also compare them with IGBT modules and explain key factors driving their adoption.

What Is an IGBT Transistor?

An IGBT transistor (Insulated Gate Bipolar Transistor) combines the high-speed switching of a MOSFET with the high-current handling of a bipolar transistor. It’s widely used in power electronics for:

• Motor drives

• Inverters

• Industrial power supplies

There are two main types:

1. IGBT discrete – Single, standalone devices

2. IGBT transistor module – Multiple IGBTs in a single package

Why IGBT Discrete Devices Are Growing in Industrial Use

1. Lower Cost for Medium-Power Applications

• IGBT price is a key factor in industrial designs.

• IGBT discrete devices are cheaper than modules for low-to-medium power needs.

• Factories using multiple IGBT transistors save money without sacrificing performance.

2. Better Thermal Management

• Discrete IGBT transistors allow better heat distribution.

• Modules can trap heat, but single devices cool more efficiently.

• This improves reliability in hot industrial environments.

3. Design Flexibility

• Engineers can select the exact IGBT transistor number needed.

• No need to oversize with a full module when only a few devices are required.

• Custom layouts are easier with IGBT discrete components.

4. Easier Repairs & Replacements

• If one IGBT discrete fails, only that unit needs replacement.

• Modules require full replacement, increasing downtime and costs.

• This is crucial in industries where uptime is critical.

5. Improved Performance in Medium-Frequency Applications

• IGBT discrete devices switch fast enough for most industrial motor drives.

• They balance efficiency and cost better than MOSFETs or full modules.

IGBT Discrete vs. Modules: Which Is Better?

For many industrial uses, IGBT discrete offers the best balance of cost and performance.

Key Industrial Applications Using IGBT Discrete

✔ Motor Drives & Servo Controls

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• Factories use IGBT transistors for precise motor speed control.

• Discrete devices allow compact, efficient designs.

✔ Uninterruptible Power Supplies (UPS)

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• Reliable switching ensures stable power backup.

• Lower IGBT transistor price reduces system costs.

✔ Welding Machines

• High current handling with good thermal performance.

• Easy maintenance with replaceable IGBT discrete units.

✔ Solar Inverters

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• Efficient power conversion for renewable energy.

• Discrete designs allow scalable solutions.

Challenges of Using IGBT Discrete

While beneficial, there are some limitations:

• Higher assembly complexity – More components to place vs. a single module.

• Gate drive requirements – Each IGBT discrete needs proper driving.

• Not ideal for ultra-high power – Modules still dominate in heavy industrial systems.

However, for most medium-power industrial uses, IGBT discrete is the smarter choice.

Conclusion

IGBT discrete solutions are growing in popularity because they offer:

• Lower cost for medium-power needs

• Better thermal performance

• Easier repairs and customization

While IGBT transistor modules still rule in high-power systems, discrete devices are winning in factories, motor controls, and power supplies. As prices drop and performance improves, expect even wider adoption.

(SHY Semi's IGBT Modules Production Process)

Video Source: Shenhuaying Semiconductor