The
IRF840 is a 500V, 8A N-channel power MOSFET housed in a 3-pin TO-220AB through-hole package. While the original manufacturer part is classified as obsolete, active drop-in replacements like the
Vishay IRF840PBF are widely available.
Key Specifications
- Drain-Source Voltage: 500 V
- Continuous Drain Current ): 8.0 A
- Drain-Source On-Resistance : 0.85 Ω maximum
- Gate Threshold Voltage : 2.0 V to 4.0 V (typical drive voltage around 10V)
- Maximum Power Dissipation : 125 W
- Operating Temperature Range: -55°C to +150°C
- Package Type: TO-220AB (Through-hole with a metal thermal tab connected to the Drain pin)
