Cummins C650N6 vs Jenbacher J312
The Cummins C650N6 and Jenbacher J312 are both natural gas generator engines in a similar power class. Both are rated at roughly 804 kVA. Displacement is 50.3 L versus 29.2 L. The table below compares their full specifications side by side.
| Specification | Cummins C650N6 | Jenbacher J312 |
|---|---|---|
| Headline rating | 813 kVA | 794 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | 635 kWe |
| Standby (60 Hz) | 650 kWe | — |
| Prime (60 Hz) | — | 635 kWe |
| Displacement | 50.3 L | 29.2 L |
| Configuration | V16 | V12 |
| Cylinders | 16 | 12 |
| Rated speed | 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | — | — |
| Origin | United States | Austria |
Choosing between Cummins C650N6 and Jenbacher J312
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 Cummins C650N6 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.