Overview
The 75N65 (often cataloged under prefixes like KGF75N65, BIDW75N65, or MM75N65) is a premium, high-efficiency Insulated Gate Bipolar Transistor. It combines the simple voltage-driven gate input of a standard MOSFET with the massive, high-voltage conduction capabilities of a traditional bipolar transistor. Housed in the heavy-duty TO-247 package, it provides the thermal stability and high-frequency switching performance required to repair heavy industrial electronics and domestic renewable energy systems.
Key Features
Advanced Trench Field-Stop Tech: Offers exceptionally low collector-emitter saturation voltage ($V_{CE(sat)}$) to dramatically reduce energy loss and heat generation.
Excellent Short-Circuit Ruggedness: Designed to withstand unexpected current surges, protecting the rest of your control circuitry during anomalies.
Rugged TO-247 Package: Massive metal backplane optimizes heat dissipation when paired with standard aluminum cooling blocks.
Stable Parallel Behavior: Features a positive temperature coefficient, enabling safe, straightforward wiring of multiple 75N65 chips in parallel arrays.
Technical Specifications
| Feature | Specification |
| Transistor Type | IGBT (Insulated Gate Bipolar Transistor) |
| Collector-Emitter Voltage (V_{CES}) | 650 V |
| Continuous Collector Current (I_C) | 150A (at 25°C) | 75A (at 100°C) |
| Gate-Emitter Voltage (V_{GES}) | ±20 V (Transient up to ±30V) |
| Saturation Voltage (V_{CE(sat)}) | ~1.7V (Typical at 75A) |
| Max Power Dissipation (P_D) | Up to 480 Watts (depending on brand variant) |
| Package Style | TO-247 (Through-Hole) |
Primary Application
Solar Inverter Servicing: The go-to power switch replacement for the main switching stages of popular solar brands in Pakistan (Inverex, Knox, Crown, Max Power).
Industrial Arc Welding Plants: Handles the brutal, high-frequency pulsing required in TIG/MIG electronic welding controllers.
Uninterruptible Power Supplies (UPS): Used in commercial online UPS units for high-power DC-to-AC conversion.
Power Factor Correction (PFC): Smooths out energy efficiency in industrial distribution setups.
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