RFP30P05 MOSFET — Specifications & Equivalents

About the RFP30P05

The RFP30P05 is a MOSFET with a drain–source voltage (V_DS) rating of 50 V and a continuous drain current (I_D) of 30 A. It can dissipate up to 120 W and is rated to a junction temperature of 175 °C. It is supplied in the TO220AB package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 50 V
• Max continuous drain current (I_D): 30 A
• Power dissipation (P_D): 120 W
• Max junction temperature (T_J): 175 °C
• Package: TO220AB

Typical applications

With its 50 V drain–source rating the RFP30P05 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.

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 (C_oss) of 800 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the RFP30P05

A drop-in substitute for the RFP30P05 should match its polarity and offer a drain–source rating of at least 50 V and a continuous drain current rating of at least 30 A.

Mechanically, check the replacement against the TO220AB 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 RFP30P05?

The RFP30P05 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 50 V drain-source and 30 A continuous drain current.

What is the maximum voltage of the RFP30P05?

The RFP30P05 has a maximum drain-source voltage (Vds) of 50 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the RFP30P05 handle?

It is rated for 30 A of continuous drain current, with power dissipation limited to 120 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the RFP30P05 come in?

It is listed in TO220AB. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the RFP30P05?

This page lists 17 candidate equivalents matched on electrical ratings and package. Any replacement should meet or exceed the original voltage, current and dissipation figures and use a compatible drive level.