TK12A10K3 MOSFET — Specifications & Equivalents

About the TK12A10K3

The TK12A10K3 is an N-channel MOSFET with a drain–source voltage (V_DS) rating of 100 V, a continuous drain current (I_D) of 12 A and an on-resistance (R_DS(on)) of 0.08 Ω. It can dissipate up to 20 W. It is supplied in the TO220SIS package.

At a glance

• Type: N-channel MOSFET
• Max drain–source voltage (V_DS): 100 V
• Max continuous drain current (I_D): 12 A
• On-resistance (R_DS(on)): 0.08 Ω
• Power dissipation (P_D): 20 W
• Package: TO220SIS
• Manufacturer: Commonly produced by Toshiba

Typical applications

With its 100 V drain–source rating the TK12A10K3 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.

Choosing a replacement for the TK12A10K3

A drop-in substitute for the TK12A10K3 must be the same N-channel type and offer a drain–source rating of at least 100 V, a continuous drain current rating of at least 12 A and an on-resistance no higher than 0.08 Ω if efficiency and heat matter.

Mechanically, check the replacement against the TO220SIS 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 TK12A10K3?

The TK12A10K3 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 100 V drain-source and 12 A continuous drain current.

What is the maximum voltage of the TK12A10K3?

The TK12A10K3 has a maximum drain-source voltage (Vds) of 100 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the TK12A10K3 handle?

It is rated for 12 A of continuous drain current, with power dissipation limited to 20 W. Real-world capability depends on your heatsinking and ambient temperature.

What is the on-resistance of the TK12A10K3?

On-resistance (Rds(on)) is 0.08 Ω. Multiply by the square of your load current to estimate conduction loss.

What package does the TK12A10K3 come in?

It is listed in TO220SIS. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the TK12A10K3?

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.