AOWF9N70 MOSFET — Specifications & Equivalents
About the AOWF9N70
The AOWF9N70 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 700 V, a continuous drain current (ID) of 9 A and an on-resistance (RDS(on)) of 1.2 Ω. It can dissipate up to 28 W and is rated to a junction temperature of 150 °C. It is supplied in the TO-262F package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 700 V
- Max continuous drain current (ID): 9 A
- On-resistance (RDS(on)): 1.2 Ω
- Power dissipation (PD): 28 W
- Max junction temperature (TJ): 150 °C
- Package: TO-262F
Typical applications
With its 700 V drain–source rating the AOWF9N70 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 1.2 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
Keep gate–source voltage within the ±30 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Switching behaviour is characterised by a rise time of 61 ns and an output capacitance (Coss) of 113 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the AOWF9N70
A drop-in substitute for the AOWF9N70 must be the same N-channel type and offer a drain–source rating of at least 700 V, a continuous drain current rating of at least 9 A and an on-resistance no higher than 1.2 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO-262F 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 AOWF9N70?
The AOWF9N70 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 700 V drain-source and 9 A continuous drain current.
What is the maximum voltage of the AOWF9N70?
The AOWF9N70 has a maximum drain-source voltage (Vds) of 700 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the AOWF9N70 handle?
It is rated for 9 A of continuous drain current, with power dissipation limited to 28 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the AOWF9N70?
On-resistance (Rds(on)) is 1.2 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the AOWF9N70 come in?
It is listed in TO-262F. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the AOWF9N70?
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) | 700 V |
| Gate-Source Voltage (Vgs) | 30 V |
| Drain Current (Id) | 9 A |
| Drain-Source On-Resistance (Rds) | 1.2 |
| Rise Time (tr) | 61 nS |
| Output Capacitance (Coss) | 113 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | TO-262F |
| Power Dissipation (Pd) | 28 W |
Equivalent & Replacement Parts
No verified equivalents are listed for AOWF9N70 yet.