What are Space-Qualified MOSFETs ?

MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) are semiconductor devices used for switching and amplification by controlling current flow through an electric field. They operate by applying a voltage to the gate terminal, which modulates the conductivity of a channel between the drain and source terminals. The insulated gate structure results in high input impedance, enabling efficient control with minimal gate current. MOSFETs are widely used in both low-power and high-power electronic systems due to their fast switching characteristics and scalability.

In power electronics and RF systems, MOSFETs play a critical role in voltage regulation, power conversion and signal switching. Their performance is influenced by channel structure, carrier mobility, and parasitic capacitances, which affect switching speed, conduction losses and thermal behavior. Proper selection of MOSFET parameters ensures reliable operation, efficient power handling and compatibility with system-level electrical and environmental requirements.

Key Specifications of Space-Qualified MOSFETs:

• Types of MOSFET: Defines the structural and operational category, such as enhancement-mode or depletion-mode devices. The type determines default conduction state and control behavior, influencing circuit design and switching strategy.
• Transistor Polarity: Specifies whether the MOSFET is an N-channel or P-channel device. This parameter affects current flow direction, drive requirements, and efficiency, with each polarity offering distinct advantages depending on the application topology.
• Continuous Drain Current: Represents the maximum current the device can conduct continuously under specified thermal conditions. It is a key factor in determining load handling capability and ensuring safe operation without exceeding thermal limits.
• Drain Source Breakdown Voltage: Indicates the maximum voltage the MOSFET can withstand between drain and source without entering breakdown. This parameter is critical for ensuring voltage margin and protecting the device in high-voltage environments.
• Gate Source Voltage: Defines the allowable voltage range between the gate and source terminals. Proper gate drive within this limit is essential to avoid gate oxide damage and to ensure reliable switching performance.
• Package Type: Describes the physical form factor and enclosure of the MOSFET. Package type influences thermal dissipation, parasitic inductance, mechanical integration, and suitability for high-frequency or high-power applications.

The Largest Database of MOSFETs

SatNow has listed MOSFETs from the leading manufacturers and made them searchable by specification. You can enter the key parameters and the search tool will scan catalogs from the leading manufacturers to identify products that meet your spec. Once you find MOSFETs that meet your requirement, you can view product information, download datasheets or request quotations. Quotation requests will be routed to the manufacturer of the product who will get back to you directly. The quotation will also be routed to distributors of the product in your region.