BSP92 MOSFET — Specifications & Equivalents
About the BSP92
The BSP92 is a P-channel MOSFET with a drain–source voltage (VDS) rating of 240 V, a continuous drain current (ID) of 0.18 A and an on-resistance (RDS(on)) of 10 Ω. It can dissipate up to 1.5 W and is rated to a junction temperature of 150 °C. It is supplied in the SOT223 package.
At a glance
- Type: P-channel MOSFET
- Max drain–source voltage (VDS): 240 V
- Max continuous drain current (ID): 0.18 A
- On-resistance (RDS(on)): 10 Ω
- Power dissipation (PD): 1.5 W
- Max junction temperature (TJ): 150 °C
- Package: SOT223
Typical applications
With its 240 V drain–source rating the BSP92 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.
At 0.18 A it is aimed at small-signal and light-load switching rather than power conversion.
On-resistance of 10 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 ±20 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Switching behaviour is characterised by an output capacitance (Coss) of 20 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the BSP92
A drop-in substitute for the BSP92 must be the same P-channel type and offer a drain–source rating of at least 240 V, a continuous drain current rating of at least 0.18 A and an on-resistance no higher than 10 Ω if efficiency and heat matter.
Mechanically, check the replacement against the SOT223 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 BSP92?
The BSP92 is a P-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 240 V drain-source and 0.18 A continuous drain current.
What is the maximum voltage of the BSP92?
The BSP92 has a maximum drain-source voltage (Vds) of 240 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the BSP92 handle?
It is rated for 0.18 A of continuous drain current, with power dissipation limited to 1.5 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the BSP92?
On-resistance (Rds(on)) is 10 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the BSP92 come in?
It is listed in SOT223. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the BSP92?
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 | P -Channel |
| Drain-Source Voltage (Vds) | 240 V |
| Gate-Source Voltage (Vgs) | 20 V |
| Drain Current (Id) | 0.18 A |
| Drain-Source On-Resistance (Rds) | 10 |
| Output Capacitance (Coss) | 20 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | SOT223 |
| Power Dissipation (Pd) | 1.5 W |
Equivalent & Replacement Parts
No verified equivalents are listed for BSP92 yet.