BFC62 MOSFET — Specifications & Equivalents
About the BFC62
The BFC62 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 800 V, a continuous drain current (ID) of 4.7 A and an on-resistance (RDS(on)) of 2.4 Ω. It can dissipate up to 125 W and is rated to a junction temperature of 150 °C. It is supplied in the TO220 package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 800 V
- Max continuous drain current (ID): 4.7 A
- On-resistance (RDS(on)): 2.4 Ω
- Power dissipation (PD): 125 W
- Max junction temperature (TJ): 150 °C
- Package: TO220
Typical applications
With its 800 V drain–source rating the BFC62 sits in the high-voltage (offline) class of switching MOSFETs, typically found in primary-side switching in offline SMPS (flyback, forward and quasi-resonant), active PFC boost stages, half-bridge and full-bridge inverters, induction heating and electronic ballasts and BLDC and AC motor drives. The rating leaves usable margin above the ~325 V DC bus obtained by rectifying 230 VAC mains, which is why this class dominates offline power supplies.
On-resistance of 2.4 Ω is relatively high, so this part is better suited to low duty-cycle or low-current switching than to continuous high-current conduction.
Gate drive and switching notes
Switching behaviour is characterised by an output capacitance (Coss) of 790 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the BFC62
A drop-in substitute for the BFC62 must be the same N-channel type and offer a drain–source rating of at least 800 V, a continuous drain current rating of at least 4.7 A and an on-resistance no higher than 2.4 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO220 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 BFC62?
The BFC62 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 800 V drain-source and 4.7 A continuous drain current.
What is the maximum voltage of the BFC62?
The BFC62 has a maximum drain-source voltage (Vds) of 800 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the BFC62 handle?
It is rated for 4.7 A of continuous drain current, with power dissipation limited to 125 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the BFC62?
On-resistance (Rds(on)) is 2.4 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the BFC62 come in?
It is listed in TO220. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the BFC62?
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) | 800 V |
| Drain Current (Id) | 4.7 A |
| Drain-Source On-Resistance (Rds) | 2.4 |
| Output Capacitance (Coss) | 790 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | TO220 |
| Power Dissipation (Pd) | 125 W |
Equivalent & Replacement Parts
No verified equivalents are listed for BFC62 yet.