Cummins INDUSTRIAL ENGINES
In ProductionCummins 4B3.9-G11
B3.9 Series
The Cummins 4B3.9-G11 is a 3.9-litre inline-4 diesel engine for generator sets, rated at 25 kVA / 20 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
Standby Power
31 kVA
Electrical Output
25 kWe
Cylinders / Config
L4
Displacement
3.9 L
Rated Speed
1,500 RPM
ISO 8528 Power Ratings
Power Factor: 0.8 pfkWm = mechanical engine shaft power · kWe = electrical output · kVA = apparent electrical power.
| Operating Duty | kWm (Mechanical) | kWe (Electrical) | kVA (Rating) |
|---|---|---|---|
| Prime | 18.9 | 17 | 21.3 |
| Standby | 22.2 | 20 | 25 |
| Operating Duty | kWm (Mechanical) | kWe (Electrical) | kVA (Rating) |
|---|---|---|---|
| Prime | 22.2 | 20 | 25 |
| Standby | 27.8 | 25 | 31.3 |
Mechanical & Electrical Specifications
| Brand | Cummins |
| Model | 4B3.9-G11 |
| Series | B3.9 Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 3.9 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | China |
Frequently Asked Questions
What is the power output of the Cummins 4B3.9-G11?
The Cummins 4B3.9-G11 is rated at 25 kVA standby / 21 kVA prime at 50 Hz (1,500 rpm); and 31 kVA standby / 25 kVA prime at 60 Hz (1,800 rpm).
Does the 4B3.9-G11 run at 50 Hz or 60 Hz?
The Cummins 4B3.9-G11 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Cummins 4B3.9-G11 use?
The Cummins 4B3.9-G11 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 4B3.9-G11?
The Cummins 4B3.9-G11 is an inline-4 (4-cylinder) engine with a displacement of 3.9 L.
Is the Cummins 4B3.9-G11 still in production?
Yes — the Cummins 4B3.9-G11 is a current production model.
Is a datasheet available for the 4B3.9-G11?
Yes — an official Cummins datasheet for the Cummins 4B3.9-G11 can be downloaded from this page.