Cummins QST30
Cummins QST30 30.48 L V12 diesel engine for generator and industrial constant-speed applications. EPA annual certification data lists up to 1,111 kW mechanical power at 1800 RPM. U.S. EPA Interim Tier 4 / U.S. EPA Final Tier 4. Electrical ratings are stored only where an official Cummins generator-set rating card identifies the exact engine model.
Production StatusIn Production
QST30 Series
- Mechanical Output
- 1,111 kW
- Cylinders
- V12
- Displacement
- 30.48 L
- Rated Speed
- 1,500 RPM
Estimated electrical output
Engine power × 0.90. These are estimates, not manufacturer generator ratings. Actual output depends on the alternator and operating conditions.
| Frequency / duty | Engine | Estimate |
|---|---|---|
| Frequency and duty unverified | 1,111 kWm | 999.9 kWe |
Datasheet & documents
Match the model number on your engine plate to the document. Check its revision date and the speed and duty listed for each power rating.
Technical specifications
Technical Specifications
| Brand | Cummins |
| Model | QST30 |
| Series | QST30 Series |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 30.48 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Interim Tier 4 / U.S. EPA Final Tier 4 |
| Certifications | U.S. EPA Interim Tier 4, U.S. EPA Final Tier 4 |
| Country of Origin | United States |
Check your engine model
The Cummins QST30 is a diesel generator-drive engine for applications whose frequency must be verified, rated at 1,111 kW / standby rating. Match the model and serial number on your engine plate when requesting a manual or parts. The ratings and emissions information below help identify the version fitted to your generator.
Other ways this model is written
qst30Cummins QST30QST30 Series QST30
QST30 repair parts
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Frequently asked questions
What fuel does the Cummins QST30 use?
The Cummins QST30 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QST30?
The Cummins QST30 is a V12 (12-cylinder) engine with a displacement of 30.48 L.
What emissions information is listed for the QST30?
This record lists U.S. EPA Interim Tier 4 / U.S. EPA Final Tier 4 for the Cummins QST30. Confirm the exact engine family, model year, configuration and applicable manufacturer certification documents before specifying it for a regulated project. A database label does not establish certification of a complete generator package.
What is the catalog status of the Cummins QST30?
The Cummins QST30 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 QST30?
This page links reference documents for the Cummins QST30. Check each document's title, model coverage, revision and rating conditions before using it for selection.