Cummins
Cummins QSB4.5
QSB4.5 Series
Cummins QSB4.5 4.46 L L4 diesel engine for generator and industrial constant-speed applications. EPA annual certification data lists up to 155 kW mechanical power at 1800 RPM. U.S. EPA Tier 3 / U.S. EPA Final Tier 4. Electrical ratings are stored only where an official Cummins generator-set rating card identifies the exact engine model.
- Electrical Output
- 155 kW
- Cylinders
- L4
- Displacement
- 4.46 L
- Rated Speed
- 1,500 RPM
Cummins QSB4.5 generator set context
The Cummins QSB4.5 is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 155 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.
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Technical Specifications
| Brand | Cummins |
| Model | QSB4.5 |
| Series | QSB4.5 Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 4.46 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Tier 3 / U.S. EPA Final Tier 4 |
| Certifications | U.S. EPA Tier 3, U.S. EPA Final Tier 4 |
| Country of Origin | United States |
Frequently asked questions
What fuel does the Cummins QSB4.5 use?
The Cummins QSB4.5 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QSB4.5?
The Cummins QSB4.5 is an inline-4 (4-cylinder) engine with a displacement of 4.46 L.
What emissions standard does the QSB4.5 meet?
The Cummins QSB4.5 is certified to U.S. EPA Tier 3 / U.S. EPA Final Tier 4 emissions standards.
Is the Cummins QSB4.5 still in production?
Yes — the Cummins QSB4.5 is a current production model.
Is a datasheet available for the QSB4.5?
Yes — an official Cummins datasheet for the Cummins QSB4.5 can be downloaded from this page.
Reference
- Canonical page
- /engines/cummins-qsb45
- Last database update
- 2026-07-24
- Manufacturer files
- 1 datasheet linked
Need this engine?
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