Cummins
Cummins QST30-C
QST30 Series
Cummins QST30-C 30.48 L V12 turbocharged and aftercooled diesel engine. EPA annual certification records list constant-speed configurations from 634 to 783 kWm at 1800 RPM under Tier 2.
Overhaul & repair parts- Manufacturer files
- No datasheet
- Last updated
- 2026-07-25
- Package route
- diesel generator sets
- Mechanical Output
- 783 kW
- Cylinders
- V12
- Displacement
- 30.48 L
- Rated Speed
- 1,500 RPM
Ask about Cummins QST30-C
Choose parts / service or sourcing. Your message includes this model and page link.
Cummins QST30-C overhaul & repair parts
Already running a Cummins QST30-C? 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-C and your selected categories included. Attach your photos there.
Cummins QST30-C generator set context
The Cummins QST30-C is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 783 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-C |
| Series | QST30 Series |
| Configuration | V12 Turbocharged Aftercooled |
| Cylinders | 12 |
| Displacement | 30.48 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Tier 2 |
| Certifications | U.S. EPA Tier 2 |
| Country of Origin | United States |
Frequently asked questions
What fuel does the Cummins QST30-C use?
The Cummins QST30-C is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QST30-C?
The Cummins QST30-C is a V12 (12-cylinder) engine with a displacement of 30.48 L.
What emissions information is listed for the QST30-C?
This record lists U.S. EPA Tier 2 for the Cummins QST30-C. 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-C?
The Cummins QST30-C is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.