Cummins QSK38-G7 vs Mitsubishi S12A2-PTA
The Cummins QSK38-G7 and Mitsubishi S12A2-PTA are both diesel generator engines in a similar power class. Both are rated at roughly 884 kVA. Displacement is 37.7 L versus 33.93 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK38-G7 | Mitsubishi S12A2-PTA |
|---|---|---|
| Headline rating | 881 kVA | 886 kVA |
| Standby (50 Hz) | 705 kWe | 708.8 kWe |
| Prime (50 Hz) | 635 kWe | 644.8 kWe |
| Standby (60 Hz) | — | 807.2 kWe |
| Prime (60 Hz) | — | 723.2 kWe |
| Displacement | 37.7 L | 33.93 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | 3400 kg |
| Origin | United States | Japan |
Choosing between Cummins QSK38-G7 and Mitsubishi S12A2-PTA
Use this comparison as an engineering shortlist, then confirm the complete generator package against load profile, voltage, 50/60 Hz frequency, duty class, emissions rules, cooling margin, altitude, ambient temperature, enclosure design, controller features, and alternator sizing. The Mitsubishi S12A2-PTA has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.