Cummins QSB5G10 vs Yunnei DEF30CZFB5
The Cummins QSB5G10 and Yunnei DEF30CZFB5 are both diesel generator engines in a similar power class. Both are rated at roughly 79 kVA. Displacement is 4.5 L versus 3 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G10 | Yunnei DEF30CZFB5 |
|---|---|---|
| Headline rating | 79 kVA | 79 kVA |
| Standby (50 Hz) | 63 kWe | — |
| Prime (50 Hz) | 58 kWe | — |
| Standby (60 Hz) | 73 kWe | — |
| Prime (60 Hz) | 66 kWe | 63 kWe |
| Displacement | 4.5 L | 3 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Final Tier 4 / EU Stage IIIA | Euro Stage V |
| Dry weight | — | — |
| Origin | United States / United Kingdom | China |
Choosing between Cummins QSB5G10 and Yunnei DEF30CZFB5
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.