IRF3706 is an obsolete MOSFET made by Infineon Technologies (originally International Rectifier) with the following main specifications:
| FET Type | Vdss | Current Continuous Drain(Id) | Drive Voltage | Vgs(th) | Power Dissipation (Max) | Package |
|---|---|---|---|---|---|---|
| N-Channel | 20V | 77A (Tc) | 2.8V, 10V | 2V @ 250uA | 88W (Tc) | TO-220-3 |
Cross Reference Details
Depending on your application, you can consider IRL510PBF-ND as a somewhat decent cross. This cross is only suitable for someone in the prototyping phase rather than a final design. The relevant specifications are below:
- FET Type: N-Channel
- Vdss: 100V
- Current Continuous Drain (Id): 5.6A (Tc)
- Drive Voltage: 4V, 5V
- Vgs(th): 2V @ 250uA
- Power Dissipation (Max): 43W (Tc)
- Package: TO-220-3
The major consideration for final design is mainly drive voltage, continuous current drain, and power dissipation. This has a little less than half the dissipation capacity, even with cooling. If you are just experimenting with drive voltage and currents under 5.6A, this will be suitable.
Other Alternates
If you do want something closer for a final design, these alternates are what I could narrow down to. I could not find anything with the exact combination of drive voltages though.