2SK935 MOSFET — Specifications & Equivalents
Manufacturer: Multi-source (JIS registered part number)
About the 2SK935
The 2SK935 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 300 V, a continuous drain current (ID) of 8 A and an on-resistance (RDS(on)) of 0.6 Ω. It can dissipate up to 40 W and is rated to a junction temperature of 150 °C. It is supplied in the TO220F package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 300 V
- Max continuous drain current (ID): 8 A
- On-resistance (RDS(on)): 0.6 Ω
- Power dissipation (PD): 40 W
- Max junction temperature (TJ): 150 °C
- Package: TO220F
- Manufacturer: Multi-source (JIS registered part number)
Typical applications
With its 300 V drain–source rating the 2SK935 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 ±20 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Choosing a replacement for the 2SK935
A drop-in substitute for the 2SK935 must be the same N-channel type and offer a drain–source rating of at least 300 V, a continuous drain current rating of at least 8 A and an on-resistance no higher than 0.6 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO220F footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.
Because 2SK935 is a JIS-registered part number rather than one vendor's proprietary series, it is produced by several manufacturers. Datasheet figures vary slightly between them, so check the datasheet of the brand you actually buy — this also makes like-for-like sourcing easier.
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 2SK935?
The 2SK935 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 300 V drain-source and 8 A continuous drain current.
What is the maximum voltage of the 2SK935?
The 2SK935 has a maximum drain-source voltage (Vds) of 300 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the 2SK935 handle?
It is rated for 8 A of continuous drain current, with power dissipation limited to 40 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the 2SK935?
On-resistance (Rds(on)) is 0.6 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the 2SK935 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 2SK935?
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) | 300 V |
| Gate-Source Voltage (Vgs) | 20 V |
| Drain Current (Id) | 8 A |
| Drain-Source On-Resistance (Rds) | 0.6 |
| Junction Temperature (Tj) | 150 °C |
| Package | TO220F |
| Power Dissipation (Pd) | 40 W |
Equivalent & Replacement Parts
No verified equivalents are listed for 2SK935 yet.