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Announcing the launch of the high withstand voltage 900V power MOSFET which reduces the number of required snubber circuits
~Optimal for flyback circuits~

Sep. 18, 2020

Shindengen Electric Manufacturing Co., Ltd. has launched two new products, the P4F90VX3 and P7F90VX3 power MOSFET for white goods and industrial devices. The products' high withstand voltage of 900V increases the degree of freedom of power supply design while also making it possible to reduce the number of required snubber circuits.

■Overview

Flyback circuits are often used in control power supplies for white goods such as refrigerators and washing machines, as well as in industrial devices. There are 800V withstand voltage class MOSFET available on the market aimed at flyback circuit switching elements for worldwide input, however there has been demand for higher withstand voltage MOSFET in order to secure greater design margins and reduce numbers of components.
The 900V withstand voltage of these new products are aimed at satisfying market demand for widening the design margin for control power supplies composed of flyback circuits, and also allowing for reduction of the number of snubber circuits used to protect the MOSFET from the surge voltage that occurs in these applications.
In addition, the input capacitance (Ciss) for these products is low, allowing for improvement of power supply light load efficiency by 1.7%^*1.
The products use the FTO-220AG (JEITA: SC-91) through-hole type packages which are often used for control power supply boards, and there are also plans to add surface mounted types to the lineup going forward. 

*1: Compared to equivalent products from other companies.

■Features

1: High withstand voltage V_DSS 900V
　　The withstand voltage of 900V increases the degree of freedom of power supply design and also makes it possible to reduce the number of snubber circuits required to protect the MOSFET from surge voltage.
2: Low input capacitance (Ciss) 610pF (P4F90VX3)
　　The low Ciss characteristics improve power supply efficiency during light loads by 1.7% (Fig. 1).
3: High breakdown voltage
　　100% Avaranche, di/dt inspection
4: FTO-220AG (JEITA: SC-91) package
　　Utilizes the through-hole type packages used by many control power supply boards.

■Typical Applications

・Control power supplies for white goods (Refrigerator, washing machine) (Flyback circuit)
・Control power supplies for industrial devices (Flyback circuit)
・Fast discharge circuit switches
・High voltage relays

■Specifications

Type No.	VDSS [V]	ID [A]	RDS(on) [Ω(typ.)]	Ciss [pF(typ.)]
P4F90VX3	900	4	2.8	610
P7F90VX3	900	7	1.2	1400

■External Dimensions and Equivalent Circuit（Unit：mm）

■Factory location

Lumphun Shindengen Co., Ltd. (Thailand) etc.

■Contact information