The part of the UPS structure that directly converts AC 380V input into low-voltage DC power is commonly referred to as the "auxiliary power supply" or "control power supply." This section primarily provides stable low-voltage DC power for the control and monitoring units, static switch control circuits, fans, and other key components of the UPS, ensuring their normal operation.

Therefore, the research and development of the circuit for the auxiliary power supply in the UPS is also very important, where the MOSFET plays an important role in control. Conventional engineers will usually select the 3N150 model field-effect transistor for use. How can one choose a pure domestic MOSFET for replacement?

A pure domestic MOSFET, such as FHA3N150A, can be used to replace the parameters of the 3N150 and similar models in the UPS auxiliary power supply circuit.

Why is FHA3N150A chosen to replace the 3N150 and similar field-effect transistors? This is because this MOSFET with a TO-247 package form can be widely used in the UPS auxiliary power supply circuit.

Its product parameters can be used in the UPS auxiliary power supply, and we can understand them in detail:

With a current of 3A and voltage of 1500V, 6.5Ω (Max) (test conditions: VGS =10V, ID=1.5A), maximum gate-source voltage @VGS =±30V, RDS(ON): 5Ω (Typ).

FHA3N150A is not only an N-channel enhancement-mode field-effect transistor, but its TO-247 package size is suitable for the UPS auxiliary power supply circuit.

This product has specific parameter values: VGS(th): 2.0-4.0V; Vgs(±V): 30; ID(A): 3A; BVdss(V): 1500V.

Reverse transfer capacitance: 32pF, maximum pulse drain current (IDM): 12(A).

Although the auxiliary power supply has relatively small power, it is crucial for the reliable operation of the UPS. Therefore, how to choose a replacement for the 3N150 model parameters is recommended to understand the domestic model from Feihong: the FHA3N150A field-effect transistor model.

Using a 3A, 1500V MOSFET for replacement, selecting the right model parameters improves the product strength of enterprises. Feihong has obtained 15 utility patents and inventions and collaborates with Sun Yat-sen University and the Chinese Academy of Sciences to develop GaN devices. Feihong's products have been widely applied in UPS auxiliary power supplies, various DC/DC power supplies, DC-AC inverters, AC-DC switching power supplies, energy storage power supplies, garden tools, and BLDC motor drives, helping partners solve domestic high-quality products that meet national conditions and international quality standards. In addition to providing free samples, Feihong can also customize MOSFET products according to customer needs. Simply search for "Feihong Semiconductor" on Baidu to find us, and our free sample hotline is 400-831-6077.