20N15 MOSFET — Specifications & Equivalents
About the 20N15
The 20N15 is a MOSFET with a drain–source voltage (VDS) rating of 150 V and a continuous drain current (ID) of 20 A. It can dissipate up to 90 W and is rated to a junction temperature of 150 °C. It is supplied in the TO-252 package.
At a glance
- Type: MOSFET
- Max drain–source voltage (VDS): 150 V
- Max continuous drain current (ID): 20 A
- Power dissipation (PD): 90 W
- Max junction temperature (TJ): 150 °C
- Package: TO-252
Typical applications
With its 150 V drain–source rating the 20N15 sits in the medium-voltage class of switching MOSFETs, typically found in 48 V and 96 V distribution systems, solar and telecom power stages, DC motor drives and intermediate-bus DC-DC converters.
Gate drive and switching notes
Keep gate–source voltage within the ±20 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Switching behaviour is characterised by an output capacitance (Coss) of 64 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the 20N15
A drop-in substitute for the 20N15 should match its polarity and offer a drain–source rating of at least 150 V and a continuous drain current rating of at least 20 A.
Mechanically, check the replacement against the TO-252 footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.
Where the application switches inductive loads or runs near the voltage limit, keep extra headroom rather than choosing a part that only just meets the original numbers.
Frequently asked questions
What is the 20N15?
The 20N15 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 150 V drain-source and 20 A continuous drain current.
What is the maximum voltage of the 20N15?
The 20N15 has a maximum drain-source voltage (Vds) of 150 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the 20N15 handle?
It is rated for 20 A of continuous drain current, with power dissipation limited to 90 W. Real-world capability depends on your heatsinking and ambient temperature.
What package does the 20N15 come in?
It is listed in TO-252. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the 20N15?
This page lists 17 candidate equivalents matched on electrical ratings and package. Any replacement should meet or exceed the original voltage, current and dissipation figures and use a compatible drive level.
Key Specifications
| Pd ⓘ - Maximum Power Dissipation | 90 W |
|---|---|
| |Vds|ⓘ - Maximum Drain-Source Voltage | 150 V |
| |Vgs|ⓘ - Maximum Gate-Source Voltage | 20 V |
| |Id| ⓘ - Maximum Drain Current | 20 A |
| Tj ⓘ - Maximum Junction Temperature | 150 °C |
| Cossⓘ - Output Capacitance | 64 pF |
| Package | TO-252 |
| INCHANGE Semiconductorisc N-Channel MOSFET Transistor 20N15FEATURESDrain Current I = 20A@ T =25D CDrain Source Voltage- | V = 150V(Min)DSSStatic Drain-Source On-Resistance: R = 0.075(Max)DS(on)Fast SwitchingMinimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSSwitching applications in power suppliesMot |