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Mitsubishi Heavy Industries, Ltd. (三菱重工業株式会社 Mitsubishi Jūkōgyō Kabushiki-kaisha, informally MHI) is a Japanese multinational engineering, electrical equipment and electronics company headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group. MHI’s products include aerospace components, air conditioners, aircraft, automotive components, forklift trucks, hydraulic equipment, machine tools, missiles, power generation equipment, printing machines, ships and space launch vehicles.

No. Engine Family Output Range
(Prime Power Applications)
Number of Cylinders
kVA kWE
1 S6A Series 450 - 500 360 - 400 6 (In Line)
2 S6R Series 600 - 800 480 - 640 6 (In Line)
3 S12A Series 850 680 12 (V)
4 S12H Series 1000 800 12 (V)
5 S12R Series 1300 - 1450 1040 - 1160 12 (V)
6 S16R Series 1600 - 2500 1280 - 2000 16 (V)
  • The quoted typical kVA / kWe ratings are based on typical generator efficiencies.
  • The kVA figures are calculated with a 0.8 power factor; 1,500 RPM (50 Hz); 220/380 V