How to choose a replacement for a mosfets.
This is a very application-specific, so there’s not much I can tell you without knowing the exact circuit where it’s going to be used.
Of course, the usual limitations apply:
What should you pay attention to?
The mosfets-replacement current, frequencies and voltage must be greater than or equal to the original.- maximum voltages,
- maximum currents,
- maximum frequencies,
- maximum gate voltage etc.
To understand the MOSFET characteristics, check several parameters critical to their performance:
- Blocking voltage (BVDSS)
- Maximum single pulse avalanche energy (EAS)
- On-resistance (RDS(ON))
- Maximum junction temperature (TJ(max))
- Continuous drain current (ID)
- Safe operating area (SOA)
- Gate charge (QG)
- Threshold Voltage (VGS(th))
- Body-Diode Forward Voltage (VSD)
- Maximum Allowable Power Dissipation (PD)
- Thermal Resistance, Junction-to-Case (Rθjc)
- dv/dt capability
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