Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Supply voltage (V)

Required number input.

Drain current (A)

Required number input.

Rise time (ns)

Required number input.

Fall time (ns)

Required number input.

Switching frequency (kHz)

Required number input.

Compute MOSFET switching loss as 0.5 x V x I x (tr + tf) x f for hard-switched transitions. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Switching loss (W)

The resulting switching loss returned as a number.

• MOSFET threshold voltage is not a recommended fully-on gate voltage. Conduction and switching loss depend on gate drive, charge plateaus, current, drain voltage, switching speed, temperature, package parasitics, reverse recovery, dead time, and thermal conditions.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• IGBT Switching Energy

  Estimate one hard-switching event's voltage-current overlap energy with linear current and voltage transitions; excludes tail current and parasitics.

• Conduction Loss

  Compute MOSFET conduction loss as the square of RMS drain current times RDS(on).

• Power Module Loss Switching Total

  Calculate average power-module switching loss from per-event turn-on and turn-off energies times switching frequency.