The IRFS450B is a high-performance N-channel power MOSFET manufactured by AMI Semiconductor/onsemi, designed to address demanding power switching and amplification challenges in industrial and commercial applications. This discrete semiconductor component belongs to the single MOSFET transistor category and utilizes advanced Metal Oxide Semiconductor Field-Effect Transistor (MOSFET) technology to deliver robust performance in high-voltage, moderate-current applications.
This power MOSFET excels in applications requiring reliable switching of high voltages up to 500V while maintaining a continuous drain current capability of 9.6A at 25°C case temperature. The device features an on-resistance (Rds On) of maximum 390 milliohms at 4.8A drain current and 10V gate-source voltage, ensuring efficient power conversion with minimal conduction losses. The maximum power dissipation rating of 96W at case temperature enables handling of substantial power loads while maintaining thermal stability across an operating temperature range from -55°C to 150°C junction temperature.
The IRFS450B addresses critical design challenges in power electronics by providing low gate charge characteristics of maximum 113 nC at 10V gate voltage, facilitating fast switching speeds and reduced switching losses in high-frequency applications. The input capacitance specification of maximum 3800 pF at 25V drain-source voltage contributes to predictable switching behavior and simplified drive circuit design. The gate threshold voltage of maximum 4V at 250µA drain current ensures reliable turn-on characteristics while the maximum gate-source voltage rating of ±30V provides excellent immunity against gate voltage transients.
Housed in the industry-standard TO-3PF package (TO-3P-3 Full Pack), this through-hole mounted component offers excellent thermal performance and mechanical reliability for demanding applications. The package design facilitates efficient heat dissipation and provides robust electrical connections suitable for high-power applications. The device is RoHS3 compliant, meeting current environmental regulations for lead-free manufacturing processes.
Primary advantages include exceptional voltage blocking capability, efficient power handling, fast switching characteristics, and robust thermal performance. The combination of high voltage rating and moderate current capability makes it ideal for applications such as switch-mode power supplies, motor drive circuits, DC-DC converters, inverter systems, and general-purpose power switching applications where reliability and efficiency are paramount.
The IRFS450B demonstrates broad compatibility with standard MOSFET drive circuits and can be easily integrated into existing designs requiring N-channel power MOSFETs with similar electrical characteristics. Its conventional pinout and package configuration ensure straightforward PCB layout and thermal management implementation.
Equivalent and alternative models include the IRF450 series variants such as IRF450A and IRF450, which share similar voltage and current ratings but may differ in package options or specific electrical parameters. Other comparable devices include the STMicroelectronics STP9NK50Z, Infineon IPP50R380CE, and Vishay IRFP450PBF, all offering similar voltage ratings and current capabilities. International Rectifier's IRFP450A and Fairchild's FQP9N50C also serve as potential alternatives, though designers should carefully compare specific parameters such as on-resistance, switching characteristics, and thermal properties to ensure optimal performance in their particular applications. When selecting alternatives, consideration should be given to package compatibility, thermal requirements, and specific electrical characteristics to maintain design integrity and performance expectations.
IRFS450B Key Technical Attributes
N-Channel MOSFET
500V Drain-Source Voltage
9.6A Continuous Drain Current
IRFS450B Packing Size
TO-3PF through-hole package
Tube packaging format
ROHS3 compliant materials
IRFS450B Application
Power supply circuits
High-voltage switching applications
Motor control and inverter systems
IRFS450B Features
The IRFS450B is an N-channel power MOSFET featuring a high voltage handling capability of up to 500V (drain-source) and a continuous drain current of 9.6A (Tc). It utilizes advanced metal oxide semiconductor technology, which provides a low on-resistance of 390 mOhm at 4.8A, 10V, allowing for efficient performance in high load conditions. The maximum allowable gate-source voltage (Vgs) reaches ±30V, broadening application flexibility. With a gate charge of 113 nC at 10V and an input capacitance of 3800 pF (25V), it supports fast switching speeds. Its power dissipation is rated at 96W under case temperature conditions. The device is housed in a robust TO-3PF package that supports reliable through-hole mounting, well-suited for environments requiring enhanced mechanical strength and thermal management. The operating temperature range extends from -55°C to 150°C (junction), making it suitable for demanding industrial environments.
IRFS450B Quality and Safety Features
Compliant with ROHS3 environmental standards, the IRFS450B ensures minimal hazardous substances for safety and reliability. Its sturdy TO-3PF full pack configuration offers improved heat dissipation and insulation, reducing the risk of thermal runaway and enhancing operational safety. The device is specifically rated for a broad operating temperature range, ensuring stable function in varied conditions. Each unit undergoes stringent quality control processes, and the packaging provides strong protection during transportation and handling.
IRFS450B Compatibility
The IRFS450B is compatible with standard drive circuitry requiring a maximum drive voltage of 10V. It can be integrated directly into circuits designed for TO-3PF or TO-3P-3 compatible layouts, as well as replacement for similar N-channel 500V MOSFETs. Its electrical characteristics and form factor ensure straightforward upgrades or retrofits in power management, switching, and motor drives.
IRFS450B Datasheet PDF
The most comprehensive and up-to-date datasheet for IRFS450B is available for download right on this page. Our website provides the authoritative source of technical documentation, ensuring your design process is backed by accurate and detailed information. We highly recommend customers download the latest datasheet here for all your development and compliance needs.
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