BS250P MOSFET — Specifications & Equivalents

About the BS250P

The BS250P is a P-channel MOSFET with a drain–source voltage (V_DS) rating of 45 V, a continuous drain current (I_D) of 0.23 A and an on-resistance (R_DS(on)) of 14 Ω. It can dissipate up to 0.7 W and is rated to a junction temperature of 150 °C. It is supplied in the ELINE package.

At a glance

• Type: P-channel MOSFET
• Max drain–source voltage (V_DS): 45 V
• Max continuous drain current (I_D): 0.23 A
• On-resistance (R_DS(on)): 14 Ω
• Power dissipation (P_D): 0.7 W
• Max junction temperature (T_J): 150 °C
• Package: ELINE

Typical applications

With its 45 V drain–source rating the BS250P sits in the low-voltage class of switching MOSFETs, typically found in 12 V and 24 V automotive and industrial rails, synchronous buck converters, load switching and reverse-polarity protection and H-bridges for small motors.

At 0.23 A it is aimed at small-signal and light-load switching rather than power conversion.

On-resistance of 14 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.

Choosing a replacement for the BS250P

A drop-in substitute for the BS250P must be the same P-channel type and offer a drain–source rating of at least 45 V, a continuous drain current rating of at least 0.23 A and an on-resistance no higher than 14 Ω if efficiency and heat matter.

Mechanically, check the replacement against the ELINE 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 BS250P?

The BS250P is a P-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 45 V drain-source and 0.23 A continuous drain current.

What is the maximum voltage of the BS250P?

The BS250P has a maximum drain-source voltage (Vds) of 45 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the BS250P handle?

It is rated for 0.23 A of continuous drain current, with power dissipation limited to 0.7 W. Real-world capability depends on your heatsinking and ambient temperature.

What is the on-resistance of the BS250P?

On-resistance (Rds(on)) is 14 Ω. Multiply by the square of your load current to estimate conduction loss.

What package does the BS250P come in?

It is listed in ELINE. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the BS250P?

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.