Liebherr D9612 vs Mitsubishi S12H-PTA Switchable
The Liebherr D9612 and Mitsubishi S12H-PTA Switchable are both diesel/hvo generator engines in a similar power class. Both are rated at roughly 1,206 kVA. Displacement is 27 L versus 37.11 L. The table below compares their full specifications side by side.
| Specification | Liebherr D9612 | Mitsubishi S12H-PTA Switchable |
|---|---|---|
| Headline rating | 1,200 kVA | 1,211 kVA |
| Standby (50 Hz) | 960 kWe | 968.8 kWe |
| Prime (50 Hz) | 864 kWe | 883.2 kWe |
| Standby (60 Hz) | — | 1,064 kWe |
| Prime (60 Hz) | — | 940.8 kWe |
| Displacement | 27 L | 37.11 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,500 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel/HVO | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Euro Stage V / U.S. EPA Tier 2 / U.S. EPA Final Tier 4 | Unregulated |
| Dry weight | — | 4450 kg |
| Origin | Switzerland | Japan |
Choosing between Liebherr D9612 and Mitsubishi S12H-PTA Switchable
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 Mitsubishi S12H-PTA Switchable has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.