fqp47p06

If you’re designing circuits needing high-side switching, reverse polarity protection, or motor control, consider the FQP47P06. This P-channel MOSFET can handle –60V and up to –47A, making it perfect for medium to high-power situations. With a low R_DS(on) of 0.026Ω, it keeps power loss minimal and efficiency high—great for PWM or quick-switching applications. Plus, its TO-220 package allows easy heat dissipation with a simple heatsink, making your job a lot easier.

fqp47p06 pinout

fqp47p06 equivalent p channel mosfet

If you’re using FQP47P06 and need alternatives, here’s my advice: IRF4905 is great for heavy loads—74A current and lower resistance, ideal for power-heavy circuits. STP75P03-06 offers even lower resistance (0.018Ω), making your circuit more efficient but slightly pricier. For better insulation and safer cooling, especially in metal-enclosed equipment, consider FQU27P06TM—it’s fully insulated, though it has a lower current rating. All these options share compatible gate voltage, making switching straightforward.

fqp47p06 high side switch circuit

Here’s a quick guide to using the FQP47P06 as a high-side switch. Its source connects to the positive power supply, and the drain connects to your load (like an inductor). To switch it on, the gate voltage must be lower than the source, so you use an N-channel MOSFET below to pull the gate low. When this lower MOSFET is on, it turns your high-side P-channel MOSFET on, letting current flow to the load. Turning off the N-channel MOSFET raises the gate voltage, switching off the high-side MOSFET. Remember to add protection components to handle voltage spikes from inductive loads.

fqp47p06 reverse polarity protection circuit

Here’s a simple and effective reverse-polarity protection method using an FQP47P06 P-channel MOSFET. Connect its Drain to battery positive, Source to your load, and Gate through a resistor to ground. When you connect the battery correctly, the MOSFET turns on smoothly with minimal voltage drop. If you accidentally reverse the battery polarity, the MOSFET automatically blocks current, protecting your circuit from damage. With its –60V rating, 47A current capacity, and low internal resistance, the FQP47P06 is perfect for your 12V or 24V battery applications.

fqp47p06 gate resistor calculation

When using the FQP47P06 MOSFET, selecting the gate resistor (R_G) correctly helps manage switching speed, reduce EMI, and limit surge currents. If you’re driving it directly from an MCU I/O (around 20mA capability), you’ll calculate a theoretical minimum resistor around 500Ω. But practically, for high-speed switching (like power supplies), choose around 5Ω–22Ω. For general load switching, 47Ω–100Ω is good. For direct MCU driving, 100Ω–330Ω provides a safe balance. Too small resistors increase EMI; too large ones cause heat and inefficiency—so adjust slightly based on your specific needs.

fqp47p06 motor driver application

When using the FQP47P06 MOSFET as a high-side switch for motors, simply connect its source to your positive voltage, drain to the motor’s positive terminal, and pull its gate low to turn it on. Its low on-resistance (0.026Ω) ensures high efficiency and minimal heat. High-side switching also protects against back-current damage from the motor. Just remember to add a diode to handle voltage spikes, and if driven by an MCU, use an N-channel transistor to control the gate for easier handling.