3SK225 MOSFET — Specifications & Equivalents

About the 3SK225

The 3SK225 is an N-channel MOSFET with a drain–source voltage (V_DS) rating of 13.5 V and a continuous drain current (I_D) of 0.03 A. It can dissipate up to 0.15 W and is rated to a junction temperature of 125 °C. It is supplied in the 2-3J1A package.

At a glance

• Type: N-channel MOSFET
• Max drain–source voltage (V_DS): 13.5 V
• Max continuous drain current (I_D): 0.03 A
• Power dissipation (P_D): 0.15 W
• Max junction temperature (T_J): 125 °C
• Package: 2-3J1A

Typical applications

With its 13.5 V drain–source rating the 3SK225 sits in the very-low-voltage class of switching MOSFETs, typically found in battery protection and power-path switching, point-of-load converters and logic-level load switching in portable devices.

At 0.03 A it is aimed at small-signal and light-load switching rather than power conversion.

Gate drive and switching notes

Keep gate–source voltage within the ±8 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Choosing a replacement for the 3SK225

A drop-in substitute for the 3SK225 must be the same N-channel type and offer a drain–source rating of at least 13.5 V and a continuous drain current rating of at least 0.03 A.

Mechanically, check the replacement against the 2-3J1A 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 3SK225?

The 3SK225 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 13.5 V drain-source and 0.03 A continuous drain current.

What is the maximum voltage of the 3SK225?

The 3SK225 has a maximum drain-source voltage (Vds) of 13.5 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the 3SK225 handle?

It is rated for 0.03 A of continuous drain current, with power dissipation limited to 0.15 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the 3SK225 come in?

It is listed in 2-3J1A. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the 3SK225?

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.