2N7057 MOSFET — Specifications & Equivalents
Manufacturer: Multi-source (JEDEC registered part number)
About the 2N7057
The 2N7057 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 400 V, a continuous drain current (ID) of 13 A and an on-resistance (RDS(on)) of 0.4 Ω. It can dissipate up to 150 W and is rated to a junction temperature of 150 °C. It is supplied in the TO218 package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 400 V
- Max continuous drain current (ID): 13 A
- On-resistance (RDS(on)): 0.4 Ω
- Power dissipation (PD): 150 W
- Max junction temperature (TJ): 150 °C
- Package: TO218
- Manufacturer: Multi-source (JEDEC registered part number)
Typical applications
With its 400 V drain–source rating the 2N7057 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 ±40 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Choosing a replacement for the 2N7057
A drop-in substitute for the 2N7057 must be the same N-channel type and offer a drain–source rating of at least 400 V, a continuous drain current rating of at least 13 A and an on-resistance no higher than 0.4 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO218 footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.
Because 2N7057 is a JEDEC-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 2N7057?
The 2N7057 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 400 V drain-source and 13 A continuous drain current.
What is the maximum voltage of the 2N7057?
The 2N7057 has a maximum drain-source voltage (Vds) of 400 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the 2N7057 handle?
It is rated for 13 A of continuous drain current, with power dissipation limited to 150 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the 2N7057?
On-resistance (Rds(on)) is 0.4 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the 2N7057 come in?
It is listed in TO218. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the 2N7057?
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) | 400 V |
| Gate-Source Voltage (Vgs) | 40 V |
| Drain Current (Id) | 13 A |
| Drain-Source On-Resistance (Rds) | 0.4 |
| Junction Temperature (Tj) | 150 °C |
| Package | TO218 |
| Power Dissipation (Pd) | 150 W |
Equivalent & Replacement Parts
No verified equivalents are listed for 2N7057 yet.