UF3055 MOSFET — Specifications & Equivalents
About the UF3055
The UF3055 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 60 V, a continuous drain current (ID) of 3 A and an on-resistance (RDS(on)) of 0.05 Ω. It can dissipate up to 1.13 W and is rated to a junction temperature of 150 °C. It is available in TO-252 and SOT-223 packages, so confirm the pinout of the exact variant you order.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 60 V
- Max continuous drain current (ID): 3 A
- On-resistance (RDS(on)): 0.05 Ω
- Power dissipation (PD): 1.13 W
- Max junction temperature (TJ): 150 °C
- Package: TO-252, SOT-223
Typical applications
With its 60 V drain–source rating the UF3055 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 low 0.05 Ω on-resistance keeps conduction loss down, which suits synchronous rectification and continuous high-current paths.
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.
Switching behaviour is characterised by a rise time of 40 ns and an output capacitance (Coss) of 180 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the UF3055
A drop-in substitute for the UF3055 must be the same N-channel type and offer a drain–source rating of at least 60 V, a continuous drain current rating of at least 3 A and an on-resistance no higher than 0.05 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO-252 and SOT-223 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 UF3055?
The UF3055 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 60 V drain-source and 3 A continuous drain current.
What is the maximum voltage of the UF3055?
The UF3055 has a maximum drain-source voltage (Vds) of 60 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the UF3055 handle?
It is rated for 3 A of continuous drain current, with power dissipation limited to 1.13 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the UF3055?
On-resistance (Rds(on)) is 0.05 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the UF3055 come in?
It is listed in TO-252 and SOT-223. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the UF3055?
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) | 60 V |
| Gate-Source Voltage (Vgs) | 20 V |
| Drain Current (Id) | 3 A |
| Drain-Source On-Resistance (Rds) | 0.05 |
| Rise Time (tr) | 40 nS |
| Output Capacitance (Coss) | 180 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | TO-252 SOT-223 |
| Power Dissipation (Pd) | 1.13 W |
Equivalent & Replacement Parts
No verified equivalents are listed for UF3055 yet.