H infinity – Hall effect sensor – Harmonic distortion – Harmonic oscillator – Harmonic – Harmonics (electrical power) – H-bridge – HDTV – Headphone – Heat transfer – Heatsink – Heaviside step function – Henry (unit) – Hertz – Heterostructure – Hewlett-Packard – Hi-Fi – High-voltage cable – High voltage – High-pass filter – High-voltage direct current – High-voltage switchgear – Hilbert transform – History of electrical engineering – Holography – Home appliance – Homopolar generator – Homopolar motor – Horsepower – Hot wire barretter – Hradec substation – Hughes Aircraft – Humidistat – HVAC – HVDC converter station – HVDC – Hybrid coil – Hybrid electric vehicle – Hybrid Synergy Drive – Hydroelectricity – Hydrogen embrittlement – Hydropower – Hydro-Québec's electricity transmission system – Hysteresis –