Cummins 6BT5.9-G1 vs SDEC SC4H140D2
The Cummins 6BT5.9-G1 and SDEC SC4H140D2 are both diesel generator engines in a similar power class. Both are rated at roughly 119 kVA. Displacement is 5.9 L versus 4 L. The table below compares their full specifications side by side.
| Specification | Cummins 6BT5.9-G1 | SDEC SC4H140D2 |
|---|---|---|
| Headline rating | 118 kVA | 119 kVA |
| Standby (50 Hz) | 94 kWe | 95 kWe |
| Prime (50 Hz) | 75 kWe | 86 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 5.9 L | 4 L |
| Configuration | L6 | L4 |
| Cylinders | 6 | 4 |
| Rated speed | 1,500 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | China National Stage II / Unregulated |
| Dry weight | — | — |
| Origin | China | China |
Choosing between Cummins 6BT5.9-G1 and SDEC SC4H140D2
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 SC4H140D2 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.