Overview
The 75T65 (commonly found as FGH75T65, K75T65, or FHA75T65) is a high-performance, 4th-generation Field Stop Trench IGBT. Unlike traditional power MOSFETs that hit their limits around high voltages, this component is engineered specifically for high-power, high-efficiency switching. Housed in a large TO-247 package for superior thermal management, it is the standard replacement part for repairing imported solar inverters, commercial online UPS setups, and industrial arc welding machines.
Key Features
The IGBT Advantage: Combines the high input impedance of a MOSFET with low conduction losses of a bipolar transistor.
Trench Field Stop Technology: Minimizes switching and conduction power losses, keeping the device highly efficient.
Rugged TO-247 Housing: Larger metal back-plate than standard TO-220, allowing for massive heat transfer during heavy load operations.
Positive Temperature Coefficient: Makes it incredibly easy to wire multiple 75T65 transistors in parallel without thermal runaway.
Technical Specifications
| Feature | Specification |
| Transistor Type | IGBT (Insulated Gate Bipolar Transistor) |
| Collector-Emitter Voltage (Vces) | 650 V |
| Continuous Collector Current (Ic) | 150A (at 25°C) | 75A (at 100°C) |
| Gate-Emitter Voltage (Vges) | ±20 V (Transient up to ±30V) |
| Saturation Voltage (Vce(sat)) | ~1.6V (Typical at 75A) |
| Max Power Dissipation (Pd) | 375 Watts |
| Package Style | TO-247-3LD (Through-Hole) |
Primary Applications
Solar Inverter Repair: Essential for repairing the high-voltage switching stages of local solar systems (Inverex, Crown, Knox, etc.).
Industrial Welding Machines: The primary power switch used in electronic stick/TIG arc welding plants.
Online UPS Systems: Handles heavy-duty AC-to-DC and DC-to-AC power conversions.
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