Caterpillar C6.6 vs SDEC 4HTAA4.3-G36
The Caterpillar C6.6 and SDEC 4HTAA4.3-G36 are both diesel generator engines in a similar power class. Both are rated at roughly 157 kVA. Displacement is 6.6 L versus 4.3 L. The table below compares their full specifications side by side.
| Specification | Caterpillar C6.6 | SDEC 4HTAA4.3-G36 |
|---|---|---|
| Headline rating | 156 kVA | 158 kVA |
| Standby (50 Hz) | 125 kWe | 126 kWe |
| Prime (50 Hz) | 113 kWe | 113 kWe |
| Standby (60 Hz) | 150 kWe | — |
| Prime (60 Hz) | 136 kWe | — |
| Displacement | 6.6 L | 4.3 L |
| Configuration | L6 | L4 |
| Cylinders | 6 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 3 | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Caterpillar C6.6 and SDEC 4HTAA4.3-G36
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 SDEC 4HTAA4.3-G36 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.