Cummins QSK38-G5 vs Mitsubishi S12R-PTA-C
The Cummins QSK38-G5 and Mitsubishi S12R-PTA-C are both diesel generator engines in a similar power class. Both are rated at roughly 1,407 kVA. Displacement is 37.7 L versus 49.03 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK38-G5 | Mitsubishi S12R-PTA-C |
|---|---|---|
| Headline rating | 1,401 kVA | 1,413 kVA |
| Standby (50 Hz) | 1,121 kWe | 1,130.5 kWe |
| Prime (50 Hz) | 1,020 kWe | 1,026 kWe |
| Standby (60 Hz) | 1,162 kWe | — |
| Prime (60 Hz) | 969 kWe | — |
| Displacement | 37.7 L | 49.03 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Cummins QSK38-G5 and Mitsubishi S12R-PTA-C
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 S12R-PTA-C has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.