Cummins QSK50-G3 vs Mitsubishi S12R-PTAR-C
Compare Cummins QSK50-G3 and Mitsubishi S12R-PTAR-C by recorded output, operating duty, frequency and engine specifications. Their listed displacements are 50.3 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 QSK50-G3 | Mitsubishi S12R-PTAR-C |
|---|---|---|
| Standby electrical (50 Hz) | 1,249 kWe | 1,237.9 kWe |
| Prime electrical (50 Hz) | 1,120 kWe | Not listed |
| Standby electrical (60 Hz) | 1,422 kWe | Not listed |
| Prime electrical (60 Hz) | 1,280 kWe | Not listed |
| Displacement | 50.3 L | 49.03 L |
| Configuration | V16 | V12 |
| Cylinders | 16 | 12 |
| Recorded engine speed | 1,500 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 | Not listed |
| Origin | United States | China |
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 QSK50-G3: Review the model record and available supporting documents
Mitsubishi S12R-PTAR-C: Review the model record and available supporting documents
Choosing between Cummins QSK50-G3 and Mitsubishi S12R-PTAR-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.