MOSFET Power Loss Calculator

Professional electronics engineering calculator with interactive results.

Drain-Source Voltage V_DS (V)

Drain Current I_D (A)

R_DS(on) at 25°C (mΩ)

Switching Frequency (kHz)

Rise Time t_r (ns)

Fall Time t_f (ns)

Conduction Loss: P_cond = I_D² × R_DS(on)

Switching Loss: P_sw = 0.5 × V_DS × I_D × (t_r+t_f) × f_sw

Hot R_DS(on): R_{DS(on)_hot} ≈ 1.7 × R_{DS(on)_25°C}