RU190N08 MOSFET — Specifications & Equivalents

About the RU190N08

The RU190N08 is a MOSFET with a drain–source voltage (V_DS) rating of 80 V and a continuous drain current (I_D) of 75 A. It can dissipate up to 30 W and is rated to a junction temperature of 175 °C. It is supplied in the TO220F package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 80 V
• Max continuous drain current (I_D): 75 A
• Power dissipation (P_D): 30 W
• Max junction temperature (T_J): 175 °C
• Package: TO220F

Typical applications

With its 80 V drain–source rating the RU190N08 sits in the mid-range class of switching MOSFETs, typically found in 24 V and 48 V industrial and battery systems, motor drives and H-bridges and load and hot-swap switching.

The 75 A current rating puts it in high-current territory, where conduction loss (I² × R_DS(on)) and thermal design usually matter more than switching loss. Budget for adequate copper area and a heatsink.

Gate drive and switching notes

Keep gate–source voltage within the ±25 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Switching behaviour is characterised by an output capacitance (C_oss) of 1100 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the RU190N08

A drop-in substitute for the RU190N08 should match its polarity and offer a drain–source rating of at least 80 V and a continuous drain current rating of at least 75 A.

Mechanically, check the replacement against the TO220F 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 RU190N08?

The RU190N08 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 80 V drain-source and 75 A continuous drain current.

What is the maximum voltage of the RU190N08?

The RU190N08 has a maximum drain-source voltage (Vds) of 80 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the RU190N08 handle?

It is rated for 75 A of continuous drain current, with power dissipation limited to 30 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the RU190N08 come in?

It is listed in TO220F. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the RU190N08?

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.