Mitsubishi
Mitsubishi 12KU30GSI
KU30GSI
Mitsubishi 12KU30GSI 322.3L inline-12 medium-speed lean-burn natural-gas engine for continuous utility power and CHP. MHI publishes 3,800 kW electrical output at 750 rpm/50 Hz and 3,650 kW at 720 rpm/60 Hz. The KU30GSI prioritizes 46.5% power-generation efficiency; MHI specifies NOx below 320 ppm at O2=0% under its stated ISO 3046 gas and site conditions.
- Prime Power · 50 Hz
- 4,750 kVA
- Electrical Output
- 3,800 kWe
- Cylinders
- L12
- Displacement
- 322.3 L
- Rated Speed
- 750 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf · kWe estimated — see note below
50 Hz750 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 3800 | 4750 |
Note: The manufacturer does not publish a separate kWe rating for this engine. kWe values shown are estimated from the rated mechanical output (kWm) using a conservative 90% alternator efficiency factor.
Mitsubishi 12KU30GSI generator set context
The Mitsubishi 12KU30GSI is listed here as a natural gas generator-drive engine for 50 Hz generator sets, with a headline 4,750 kVA / 3,800 kWe / prime rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | Mitsubishi |
| Model | 12KU30GSI |
| Series | KU30GSI |
| Configuration | L12 |
| Cylinders | 12 |
| Displacement | 322.3 L |
| Dry Weight | 40000 kg |
| Dimensions (L×W×H) | 9850 × 3180 × 4980 mm |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Country of Origin | Japan |
Frequently asked questions
What is the power output of the Mitsubishi 12KU30GSI?
The Mitsubishi 12KU30GSI is rated at 4,750 kVA prime at 50 Hz (750 rpm).
Does the 12KU30GSI run at 50 Hz or 60 Hz?
The Mitsubishi 12KU30GSI is rated for 50 Hz (750 rpm).
What fuel does the Mitsubishi 12KU30GSI use?
The Mitsubishi 12KU30GSI is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 12KU30GSI?
The Mitsubishi 12KU30GSI is an inline-12 (12-cylinder) engine with a displacement of 322.3 L.
Is the Mitsubishi 12KU30GSI still in production?
Yes — the Mitsubishi 12KU30GSI is a current production model.
Is a datasheet available for the 12KU30GSI?
Yes — an official Mitsubishi datasheet for the Mitsubishi 12KU30GSI can be downloaded from this page.
Related Engines
Compare Mitsubishi 12KU30GSI
Reference
- Canonical page
- /engines/mitsubishi-12ku30gsi
- Last database update
- 2026-07-23
- Manufacturer files
- 3 datasheets linked
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