IRF840 N-Channel Power MOSFET 8A 500V TO-220AB
Prices updated: 13 Oct 2026
Compare prices
| Store | product | Price | View in store |
|---|---|---|---|
 MicroohmCheapest | IRF840 N-Channel Power Mosfet Transistor 8A 500V 0.85Ω TO-220 | 20 EGP33 | View in store |
 Makers Electronics | IRF840 N-Channel MOSFET 8A 500V 0.85Ω TO-220AB | 20 EGP | View in store |
 RAM Electronics | IRF840 N-Channel MOSFET | 28 EGP | View in store |
Price history
Lowest daily price, last 90 days
Lowest price recorded: 20 EGP
About this product
IRF840 is an N-channel power MOSFET in a TO-220AB package, rated for 500 V drain-source and 8 A continuous current, with 0.85 Ω on-resistance at VGS = 10 V. It is used for high-voltage switching in power control circuits, such as switching motors, lamps and inductive loads with proper protection.
Specifications
- Type
- N-channel power MOSFET
- Drain-source voltage (VDS)
- 500 V
- Continuous drain current (ID)
- 8 A
- On-resistance RDS(on)
- 0.85 Ω at VGS = 10 V
- Package
- TO-220AB
Frequently asked questions
What is the price of IRF840 N-Channel Power MOSFET 8A 500V TO-220AB in Egypt?
IRF840 N-Channel Power MOSFET 8A 500V TO-220AB currently costs between 20 and 28 EGP across 3 offers in Egypt.
Where can I buy IRF840 N-Channel Power MOSFET 8A 500V TO-220AB in Egypt?
IRF840 N-Channel Power MOSFET 8A 500V TO-220AB is available from Microohm, Makers Electronics, and RAM Electronics. Compare the offers above to find the best price.
Can I drive IRF840 directly from a 3.3V or 5V microcontroller pin?
Not reliably. Its RDS(on) is specified at VGS = 10 V and its gate threshold is roughly 2 to 4 V, so a 3.3 V or 5 V GPIO will not fully turn it on. Use a gate driver, drive the gate near 10 V, or choose a logic-level MOSFET.
Does it need protection when switching motors or relays?
Yes. Inductive loads generate a voltage spike when switched off, so place a flyback diode across the load to protect the MOSFET.
