22N20 MOSFET — Specifications & Equivalents
About the 22N20
The 22N20 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 200 V, a continuous drain current (ID) of 22 A and an on-resistance (RDS(on)) of 0.12 Ω. It can dissipate up to 156 W and is rated to a junction temperature of 150 °C. It is available in TO-220 and TO-220F packages, so confirm the pinout of the exact variant you order.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 200 V
- Max continuous drain current (ID): 22 A
- On-resistance (RDS(on)): 0.12 Ω
- Power dissipation (PD): 156 W
- Max junction temperature (TJ): 150 °C
- Package: TO-220, TO-220F
Typical applications
With its 200 V drain–source rating the 22N20 sits in the medium-high-voltage class of switching MOSFETs, typically found in telecom and industrial DC rails, boost and flyback converters, LED and backlight drivers and power-factor-correction stages. Common where the bus sits well above 100 V but below rectified mains.
Gate drive and switching notes
Keep gate–source voltage within the ±30 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Switching behaviour is characterised by a rise time of 300 ns and an output capacitance (Coss) of 220 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the 22N20
A drop-in substitute for the 22N20 must be the same N-channel type and offer a drain–source rating of at least 200 V, a continuous drain current rating of at least 22 A and an on-resistance no higher than 0.12 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO-220 and TO-220F 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 22N20?
The 22N20 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 200 V drain-source and 22 A continuous drain current.
What is the maximum voltage of the 22N20?
The 22N20 has a maximum drain-source voltage (Vds) of 200 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the 22N20 handle?
It is rated for 22 A of continuous drain current, with power dissipation limited to 156 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the 22N20?
On-resistance (Rds(on)) is 0.12 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the 22N20 come in?
It is listed in TO-220 and TO-220F. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the 22N20?
No verified equivalents are listed yet. Choose a part of the same polarity that meets or exceeds every rating above and shares a compatible package and pinout.
Key Specifications
| Type | MOSFET |
|---|---|
| Channel Type | N -Channel |
| Drain-Source Voltage (Vds) | 200 V |
| Gate-Source Voltage (Vgs) | 30 V |
| Drain Current (Id) | 22 A |
| Drain-Source On-Resistance (Rds) | 0.12 |
| Rise Time (tr) | 300 nS |
| Output Capacitance (Coss) | 220 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | TO-220 TO-220F |
| Power Dissipation (Pd) | 156 W |
Equivalent & Replacement Parts
No verified equivalents are listed for 22N20 yet.