Cummins QSB5G12 vs Yunnei DEF47CZAA5
The Cummins QSB5G12 and Yunnei DEF47CZAA5 are both diesel generator engines in a similar power class. Both are rated at roughly 144 kVA. Displacement is 4.5 L versus 4.7 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB5G12 | Yunnei DEF47CZAA5 |
|---|---|---|
| Headline rating | 143 kVA | 145 kVA |
| Standby (50 Hz) | 114 kWe | — |
| Prime (50 Hz) | 103 kWe | 116 kWe |
| Standby (60 Hz) | 126 kWe | — |
| Prime (60 Hz) | 114 kWe | — |
| Displacement | 4.5 L | 4.7 L |
| Configuration | L4 | L4 |
| Cylinders | 4 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 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 QSB5G12 and Yunnei DEF47CZAA5
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 Yunnei DEF47CZAA5 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.