STF42N65M5

Vgs(th) (Max) @ Id:	5V @ 250µA
Package / Case:	TO-220-3 Full Pack
Supplier Device Package:	TO-220FP
Mounting Type:	Through Hole
Operating Temperature:	150°C (TJ)
Power Dissipation (Max):	40W (Tc)
FET Feature:	--
Input Capacitance (Ciss) (Max) @ Vds:	4650pF @ 100V
Vgs (Max):	±25V
Gate Charge (Qg) (Max) @ Vgs:	100nC @ 10V
Series:	MDmesh™ V
Rds On (Max) @ Id, Vgs:	79 mOhm @ 16.5A, 10V
Drive Voltage (Max Rds On, Min Rds On):	10V
Current - Continuous Drain (Id) @ 25°C:	33A (Tc)
Drain to Source Voltage (Vdss):	650V
Technology:	MOSFET (Metal Oxide)
FET Type:	N-Channel
Part Status:	Active
Packaging:	Tube

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IntroductionThe STF42N65M5 is a member of the STMicroelectronics family of MOSFET power transistors. This type of transistor is used to control the flow of voltage or current in a variety of applications from automotive to lighting applications. It is a fast switching, robust N-channel MOSFET with a rather low RDS(on) and requires a minimum gate drive voltage of 4.5V. It is suitable for use in a wide range of switch mode applications including inverters, converters, and motor drives.Application FieldThe STF42N65M5 is suitable for a variety of switch mode applications. It can be used in power switching mode control applications such as high power audio amplifiers, DC-DC converters, and motor drives. Other applications include automotive switching applications, light dimming, and power supplies. Because it is a fast switching device, it is well suited for resonant switch mode applications such as ZVS (Zero Voltage Switching) converters, active clamp forward converters, and flyback converters. With its low on resistance, it can be used as the main power switch in these type of advances converters and while guaranteeing excellent efficiency and low EMI. It can also be used in consumer and industrial power supplies where fast switching, low conduction losses, and improved efficiency are required.Working PrincipleThe STF42N65M5 is an N-channel MOSFET with a maximum drain-source voltage of 650V. The device operates on the principle of a voltage drop across a transistor when voltage is applied to its gate. When there is a voltage applied to the gate, current is allowed to flow from the drain to the source. The MOSFET operates as an switch where its on-resistance (RDS(on)) is a function of the voltage applied to its gate. The lower the voltage applied to its gate, the lower the RDS(on) will be. In order for the MOSFET to be in the "on" state, it must have an input current of at least 4.5V, which is referred to as its threshold voltage, Vth. This lets the MOSFET know that it is being driven and that it needs to switch to its "on" state. The MOSFET will then remain in that state until it receives a signal with a voltage lower than Vth, at which point it will switch back to its "off" state. ConclusionThe STF42N65M5 is a highly efficient, fast switching, N-channel MOSFET. It is suitable for a variety of switch mode applications including inverters, converters, and motor drives. It is well suited for resonant switch mode applications such as ZVS (Zero Voltage Switching) converters, active clamp forward converters, and flyback converters. It can also be used in consumer and industrial power supplies, automotive switching applications, light dimming, and power supplies. The device operates on the principle of a voltage drop across a transistor when voltage is applied to its gate. It requires a minimum gate drive voltage of 4.5V for it to be in the "on" state.

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