Caterpillar
Caterpillar C6.6
C Series
Caterpillar C6.6 6.6L 6-cylinder diesel engine for generator sets. 150 ekW standby at 60Hz. U.S. EPA Tier 3. Turbocharged Aftercooled (ACERT).
- Standby Power · 50 Hz
- 156 kVA
- Electrical Output
- 125 kWe
- Cylinders
- L6
- Displacement
- 6.6 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 | 125.6 | 113 | 141.3 |
| Standby Power | 138.9 | 125 | 156.3 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 151.1 | 136 | 170 |
| Standby Power | 166.7 | 150 | 187.5 |
Caterpillar C6.6 generator set context
The Caterpillar C6.6 is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 156 kVA / 125 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.
Also searched as
Technical Specifications
| Brand | Caterpillar |
| Model | C6.6 |
| Series | C Series |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 6.6 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Tier 3 |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the Caterpillar C6.6?
The Caterpillar C6.6 is rated at 156 kVA standby / 141 kVA prime at 50 Hz (1,500 rpm); and 188 kVA standby / 170 kVA prime at 60 Hz (1,800 rpm).
Does the C6.6 run at 50 Hz or 60 Hz?
The Caterpillar C6.6 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Caterpillar C6.6 use?
The Caterpillar C6.6 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the C6.6?
The Caterpillar C6.6 is an inline-6 (6-cylinder) engine with a displacement of 6.6 L.
What emissions standard does the C6.6 meet?
The Caterpillar C6.6 is certified to U.S. EPA Tier 3 emissions standards.
Is the Caterpillar C6.6 still in production?
Yes — the Caterpillar C6.6 is a current production model.
Is a datasheet available for the C6.6?
Yes — an official Caterpillar datasheet for the Caterpillar C6.6 can be downloaded from this page.
Related Engines
Compare Caterpillar C6.6
Reference
- Canonical page
- /engines/caterpillar-c6-6
- Last database update
- 2026-06-28
- Manufacturer files
- 2 datasheets linked
Need this engine?
Need a generator package using this engine? Haifeng Machinery can help with sizing, alternator selection, controller, enclosure, voltage, and compliance support.
Get a Quote ↗Or browse Haifeng's diesel generator sets ↗