Cummins
Cummins QST30
QST30 Series
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.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-24
- Package route
- diesel generator sets
- Mechanical Output
- 1,111 kW
- Cylinders
- V12
- Displacement
- 30.48 L
- Rated Speed
- 1,500 RPM
Ask about Cummins QST30
Choose parts / service or sourcing. Your message includes this model and page link.
Cummins QST30 overhaul & repair parts
Already running a Cummins QST30? Start with the parts you need, then send your nameplate so we can help check the right references for your engine.
These categories have model-related records. Part numbers need further checking before we display them here.
Let’s identify the right parts.
The model is the starting point. Serial numbers and build configurations can change which parts fit.
- Take a clear photo of the engine nameplate.
- Tell us what needs repair or replacement.
- Send both in WhatsApp to start a fitment check.
Opens WhatsApp with QST30 and your selected categories included. Attach your photos there.
Cummins QST30 generator set context
The Cummins QST30 is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 1,111 kW / 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.
Also searched as
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 |
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.