Alpha & Omega Semiconductor Inc. AOK50B65GL1

Overview

AOK50B65GL1 from Alpha & Omega Semiconductor is a 1200 V, 10 A silicon carbide (αSiC) power MOSFET in TO-247-3L package, optimized for high-voltage switching in EV chargers and solar inverters. It delivers 500 mΩ typical R_DS(ON) at V_GS = 15 V, 50 nC Q_rr, and 6 µJ E_OSS at 800 V, enabling high-efficiency, fast-switching operation with low conduction and switching losses.

For engineers reviewing the AOK50B65GL1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 1200 V blocking capability, 10 A pulsed drain rating, αSiC technology advantages over silicon, gate drive compatibility at ±15 V, and thermal performance with R_θJC = 3.4 °C/W.

Technical Context

This αSiC MOSFET employs proprietary wide-bandgap semiconductor material to achieve superior voltage handling and thermal stability versus silicon devices. Its low C_iss (206 pF), C_rss (1.6 pF), and R_g (5.8 Ω) enable fast, controllable switching with minimal Miller effect and reduced gate drive loss.

The device integrates a low-Q_rr body diode (50 nC) and is 100% UIS tested to 40 mJ, supporting robust operation in hard-switched and resonant topologies. Its recommended gate drive range is –5 V/+15 V, with transient tolerance up to –8 V/+20 V, ensuring reliable turn-off under dV/dt stress.

Key Specifications

Pinout & Package

Package: TO-247-3L, through-hole, isolated tab, standard industry footprint with mechanical and thermal optimization for high-power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage SiC MOSFET applications.

Compared with C3M0065120K and STP12N120K5, the AOK50B65GL1 provides higher voltage capability and lower switching loss than the IGBT, while offering superior 1200 V ruggedness and simpler gate drive than the 650 V SiC alternative-making it optimal for 1000–1200 V DC systems demanding both efficiency and reliability.

Availability

AOK50B65GL1 is available at Aetrix Electronics and suitable for EV charger design, solar inverter development, and industrial UPS systems requiring stable component supply and long-term lifecycle assurance.

Supply support for AOK50B65GL1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and SiC devices for power conversion.

The AOK50B65GL1 belongs to AOS's αSiC family, engineered specifically for high-voltage, high-frequency switching in renewable energy and industrial power systems where thermal robustness and low-loss operation are critical.

FAQ

What is the maximum continuous drain current rating for AOK50B65GL1 at 100°C case temperature?

The AOK50B65GL1 has a continuous drain current (I_D) rating of 4.5 A at T_C = 100°C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limitations of the TO-247-3L package and ensures safe operation within the 175°C maximum junction temperature limit. The AOK50B65GL1 must be mounted to an adequately sized heatsink to maintain this rating under sustained load.

Does AOK50B65GL1 integrate a body diode, and what is its reverse recovery performance?

Yes, the AOK50B65GL1 includes an integrated SiC body diode with measured Q_rr = 50 nC and t_rr = 45 ns under IF = 3 A, dI/dt = 1500 A/µs, and V_DS = 800 V conditions. This low reverse recovery charge significantly reduces commutation loss and EMI compared to silicon diodes, making the AOK50B65GL1 suitable for synchronous rectification and bidirectional topologies without external diode addition.

What gate drive voltage range is recommended for reliable operation of AOK50B65GL1?

The AOK50B65GL1 specifies a recommended operating gate-source voltage range of –5 V to +15 V, with transient tolerance up to –8 V/+20 V. Driving the AOK50B65GL1 at +15 V ensures full enhancement and minimal R_DS(ON), while the negative turn-off bias improves noise immunity and prevents spurious turn-on during high dV/dt events in bridge configurations.

Is AOK50B65GL1 rated for avalanche energy, and how is it tested?

Yes, the AOK50B65GL1 is 100% tested for unclamped inductive switching (UIS) with a single-pulse avalanche energy rating of 40 mJ. Testing follows JEDEC standard JESD24-1 using L = 5 mH, I_AS = 4 A, and R_G = 25 Ω, starting from T_J = 25°C. This ruggedness ensures reliable operation during fault conditions such as short-circuit or inductive load transients without device failure.

What thermal resistance values apply to AOK50B65GL1, and how do they impact heatsink design?

The AOK50B65GL1 has R_θJC = 3.4 °C/W (junction-to-case) and R_θJA = 40 °C/W (junction-to-ambient, still air). For thermal design, R_θJC governs the interface between the TO-247-3L tab and heatsink; a low-thermal-resistance interface (e.g., thermal paste + flat mounting surface) is essential to realize the full 44 W power dissipation capability at T_C = 25°C. The AOK50B65GL1 requires careful heatsink sizing based on target T_J and ambient conditions.