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).
Overhaul & repair parts- Manufacturer files
- 2 datasheets
- Last updated
- 2026-06-28
- Package route
- diesel generator sets
- 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 |
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Caterpillar C6.6 overhaul & repair parts
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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.
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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 information is listed for the C6.6?
This record lists U.S. EPA Tier 3 for the Caterpillar C6.6. 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 Caterpillar C6.6?
The Caterpillar C6.6 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 C6.6?
This page links reference documents for the Caterpillar C6.6. Check each document's title, model coverage, revision and rating conditions before using it for selection.