Caterpillar C4.4 vs Yunnei DEF30CBB5
The Caterpillar C4.4 and Yunnei DEF30CBB5 are both diesel generator engines in a similar power class. Both are rated at roughly 56 kVA. Displacement is 4.4 L versus 3 L. The table below compares their full specifications side by side.
| Specification | Caterpillar C4.4 | Yunnei DEF30CBB5 |
|---|---|---|
| Headline rating | 56 kVA | 56 kVA |
| Standby (50 Hz) | 45 kWe | — |
| Prime (50 Hz) | 40 kWe | — |
| Standby (60 Hz) | 50 kWe | — |
| Prime (60 Hz) | 45 kWe | 45 kWe |
| Displacement | 4.4 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 Tier 3 | Euro Stage V |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Caterpillar C4.4 and Yunnei DEF30CBB5
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.