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The IRF730 is a power MOSFET manufactured by STMicroelectronics (STM). Below are the factual specifications, descriptions, and features from the Manufactor Datasheet:

Specifications:

• Manufacturer: STMicroelectronics (STM)
• Type: N-Channel Power MOSFET
• Drain-Source Voltage (V_DSS): 400V
• Continuous Drain Current (I_D): 5.5A
• Pulsed Drain Current (I_DM): 22A
• Gate-Source Voltage (V_GS): ±20V
• Power Dissipation (P_D): 75W
• On-Resistance (R_DS(on)): 1.0Ω (max) at V_GS = 10V
• Threshold Voltage (V_GS(th)): 2-4V
• Input Capacitance (C_iss): 350pF (typ)
• Output Capacitance (C_oss): 75pF (typ)
• Reverse Transfer Capacitance (C_rss): 25pF (typ)
• Turn-On Delay Time (t_d(on)): 10ns (typ)
• Turn-Off Delay Time (t_d(off)): 65ns (typ)
• Operating Junction Temperature (T_J): -55°C to +150°C

Description:

The IRF730 is a high-voltage N-Channel MOSFET designed for switching applications. It is commonly used in power supplies, motor control, and other high-voltage circuits. The device features low gate charge, fast switching speeds, and robust performance in high-voltage environments.

Features:

• High Voltage Capability (400V)
• Low On-Resistance (1.0Ω max)
• Fast Switching Speed
• Improved dv/dt Capability
• Avalanche Energy Specified
• TO-220 Package for Easy Mounting

This information is based on the manufacturer's datasheet and technical documentation.