Cummins
Cummins QSG12-G4
QSG12
Cummins QSG12-G4 11.8L in-line 6-cylinder diesel engine for generator sets. 333 kWe prime / 364 kWe standby at 50Hz (383 / 418 kWe at 60Hz). Cummins High Pressure Common Rail fuel system, air-to-air charge cooled. Turbocharged, Charge Air Cooled.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-06-29
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 455 kVA
- Electrical Output
- 364 kWe
- Cylinders
- L6
- Displacement
- 11.8 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 356 | 333 | 416 |
| Standby Power | 390 | 364 | 455 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 408 | 383 | 479 |
| Standby Power | 445 | 418 | 523 |
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Cummins QSG12-G4 overhaul & repair parts
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Cummins QSG12-G4 generator set context
The Cummins QSG12-G4 is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 455 kVA / 364 kWe / standby 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 | Cummins |
| Model | QSG12-G4 |
| Series | QSG12 |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 11.8 L |
| Fuel Consumption | 82 L/hr |
| Dry Weight | 1110 kg |
| Dimensions (L×W×H) | 2293 × 1083 × 1705 mm |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | China |
Frequently asked questions
What is the power output of the Cummins QSG12-G4?
The Cummins QSG12-G4 is rated at 455 kVA standby / 416 kVA prime at 50 Hz (1,500 rpm); and 523 kVA standby / 479 kVA prime at 60 Hz (1,800 rpm).
Does the QSG12-G4 run at 50 Hz or 60 Hz?
The Cummins QSG12-G4 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Cummins QSG12-G4 use?
The Cummins QSG12-G4 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QSG12-G4?
The Cummins QSG12-G4 is an inline-6 (6-cylinder) engine with a displacement of 11.8 L.
What is the catalog status of the Cummins QSG12-G4?
The Cummins QSG12-G4 is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the QSG12-G4?
This page links reference documents for the Cummins QSG12-G4. Check each document's title, model coverage, revision and rating conditions before using it for selection.