20N60T N Channel Mosfet To-220

If your board needs a high-voltage N-channel switch in a TO-220 package, and the old part is a 20N60T, this is the part to order. It is a 600V 20A MOSFET that can switch heavy power loads fast, made for power supplies, inverters, UPS units, and motor control. It does not fit jobs that need more than 600 V, more than 20 A with the case at 25 °C, or a different package or pin order. Check the checks below before you order, so the voltage, the current, the gate drive, the package, and the pins all match your board.

This is an original, high-quality part.

What the 20N60T does

A MOSFET is a switch that you turn on and off with voltage on its gate leg, not with current. Put about 10 V on the gate and this 20N60 MOSFET turns fully on, with only 0.19 ohms of resistance at most between drain and source. That low resistance means less power is lost as heat when a big current flows. Take the gate voltage away and the switch turns off, blocking up to 600 V. Repair techs use this kind of part as the main switch in a power supply, an inverter, or a UPS, where it must switch mains-level voltage on and off thousands of times a second.

The TO-220 package has a metal tab with a hole, so you can bolt it to a heatsink. With the case held at 25 °C it can shed up to 208 W. Without a heatsink it can shed far less, and at a case temperature of 100 °C the steady current limit drops to 12.5 A, so work out the heat from your real current before you order.

Key features

• N-channel power MOSFET for high-voltage switching
• 600 V drain-source voltage, 650 V at 150 °C junction temperature
• 20 A steady drain current with the case at 25 °C, 12.5 A at 100 °C
• 60 A pulsed drain current
• Low on-resistance: 0.19 ohms at most at 10 V gate drive, 10 A
• Fast switching: 140 ns rise time, 65 ns fall time (typical)
• TO-220 package with mounting tab for a heatsink
• 208 W power dissipation with the case at 25 °C
• Built-in body diode, 20 A steady, for freewheeling current

Checks before you order

• Part code: the old part must be a 20N60 type in a TO-220 package. The short code for this part is 20N60. If your old part shows a different full code, stop and check your board list again.
• Pin order: hold the part with the markings facing you and the legs pointing down. Pin 1 is the gate, pin 2 is the drain, pin 3 is the source. The drain is also joined to the metal tab, so the tab sits at drain voltage and must be kept clear of other metalwork unless your circuit plans for that.
• Package: your board footprint must be TO-220 with a mounting hole. This is a through-hole part with three legs. It is not a surface-mount part, and it is not the same as a full-pack body with a plastic-covered tab, which sheds heat differently.
• Voltage: the drain-source voltage in your circuit must stay at or below 600 V, and the gate-source voltage must stay inside ±30 V. Above that, this part is the wrong pick.
• Current and heat: the steady drain current must stay at or below 20 A with the case at 25 °C, and only 12.5 A with the case at 100 °C. Work out the heat from your real current and the 0.19 ohm on-resistance, and fit a heatsink if the heat needs one. A part run hot without a heatsink will fail early even if the headline current looks fine.
• Gate drive: your drive circuit must give about 10 V on the gate for full turn-on. The part starts to turn on between 3 V and 5 V, but that is only the threshold, not full turn-on. Driving it with a weak 5 V signal leaves it half on, and a half-on switch runs hot and burns out.

Specifications

All figures below are from the official datasheet at junction temperature 25 °C unless noted. No figure here was guessed.

Type	N-channel power MOSFET, single, enhancement mode
Package	TO-220, 3 leads, through hole
Pin 1	Gate (G)
Pin 2	Drain (D), joined to the tab
Pin 3	Source (S)
Drain-source voltage	600 V
Drain current, steady, case at 25 °C	20 A
Drain current, steady, case at 100 °C	12.5 A
Drain current, pulsed	60 A
Gate-source voltage	±30 V
Gate threshold voltage	3.0 V to 5.0 V
On-resistance, max	0.19 Ω at 10 V gate drive, 10 A
Total gate charge, max	98 nC at 480 V, 20 A, 10 V gate drive
Input capacitance, max	3080 pF at 25 V, 1 MHz
Turn-on delay / rise time, max	135 ns / 290 ns
Turn-off delay / fall time, max	470 ns / 140 ns
Power dissipation, case at 25 °C	208 W
Thermal resistance, junction to case	0.6 °C/W
Body diode current, steady / pulsed	20 A / 60 A
Body diode forward voltage, max	1.4 V at 20 A
Operating and storage temperature	−55 °C to +150 °C

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. 20N60 MOSFET is the short code buyers type when they search, because the full code on the shop listing adds the trailing T. 20N60 TO-220 is the short code with the package, which is the form to use when you want this exact size. 600V 20A MOSFET is the plain name buyers use for this kind of high-voltage, high-current switch. N-channel MOSFET TO-220 is the plain family name for this part.

If you see 20N60 on a TO-220 body, and your circuit needs 600 V and 20 A with gate-drain-source pins, this page is the right match. Do not judge by the code alone — check the package size, the pin order, and the gate drive too.

Frequently Asked Questions

What is the pin order of this TO-220 part?

Pin 1 is the gate, pin 2 is the drain, and pin 3 is the source. The drain is also joined to the metal mounting tab, so the tab sits at drain voltage and must be kept clear of other metalwork unless your circuit plans for that.

What voltage and current can this part handle?

It handles up to 600 V from drain to source and 20 A of steady drain current with the case at 25 °C, dropping to 12.5 A with the case at 100 °C, with short pulses up to 60 A and up to 208 W of power with the case at 25 °C. Stay inside all of those limits at the same time.

Can I drive this MOSFET straight from a 5 V logic pin?

No, not for full power work. The part starts to turn on between 3 V and 5 V, but full turn-on with the lowest resistance needs about 10 V on the gate. A weak 5 V drive leaves it half on, and a half-on switch runs hot and burns out. Use a proper 10 V gate drive.

Does the metal tab need insulation?

It depends on your circuit. The tab is joined to the drain, so it carries drain voltage. If your heatsink is shared with other parts or with the case, fit an insulating pad and bush. If the heatsink is live at drain voltage by design, no pad is needed — but check your circuit plan first, never guess.

Does this part need a heatsink?

It depends on your heat. The 208 W figure holds only when the case is kept at 25 °C, which in real use means a heatsink. Work out the heat from your real current and the 0.19 ohm on-resistance: at 10 A that is already about 19 W. If the heat is more than a bare TO-220 body can shed on its own, fit a heatsink before you run the circuit.

How do I check if the old part is dead?

With the part out of the circuit and the gate shorted to the source, a good part reads open from drain to source in both directions on a meter. A short from drain to source in both directions means the part has failed. Always check the gate drive and the load too, or the new part can fail for the same reason the old one did.

Use note kept from the old page: this part was listed before for efficient switching in power supply, inverter, UPS, motor control, and electronic repair work, with a 600 V rating and 20 A rating for demanding power circuits, in a TO-220 package for easy installation and good heat shedding, and that use still stands.