Cummins QSK38-G17 vs Mitsubishi S12R-PTA2
Compare Cummins QSK38-G17 and Mitsubishi S12R-PTA2 by catalog output, operating duty, frequency and engine specifications. Their listed displacements are 37.885 L and 49.03 L, respectively. Start with the same duty and frequency, then check each model’s source and package conditions. These records alone do not establish interchangeability.
| Specification | Cummins QSK38-G17 | Mitsubishi S12R-PTA2 |
|---|---|---|
| Standby electrical (50 Hz) | Not listed | 1,249.6 kWe |
| Prime electrical (50 Hz) | Not listed | 1,135.2 kWe |
| Standby electrical (60 Hz) | 1,250 kWe | 1,396.8 kWe |
| Prime electrical (60 Hz) | 1,136 kWe | 1,272.8 kWe |
| Other recorded mechanical power (duty unspecified) | 1,399 kW | Not listed |
| Displacement | 37.885 L | 49.03 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Recorded engine speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Recorded emissions classification | U.S. EPA Tier 2 | Unregulated |
| Dry weight | Not listed | 5,400 kg |
| Origin | United States | Japan |
Mitsubishi S12R-PTA2: Electrical output includes catalog estimates. Check the calculation basis and source document on the model page; these are not verified complete-generator ratings. Rating details
Compare matching ratings
Read across a row to compare the same operating duty and frequency. kWe is electrical output; mechanical kW is power at the engine shaft. kVA is apparent electrical power and is shown only when kWe is missing, without converting it. “Not listed” means the record lacks that rating, not zero output. Continuous and prime duties are kept separate. Check source documents, units and site conditions before comparing values.
An emissions classification in the catalog is not proof of certification for your engine or installation. Confirm the exact model, applicable documents and generator configuration.
Cummins QSK38-G17: Review the model record and available supporting documents
Mitsubishi S12R-PTA2: Review the model record and available supporting documents
Choosing between Cummins QSK38-G17 and Mitsubishi S12R-PTA2
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.