Cummins INDUSTRIAL ENGINES
In ProductionCummins QSB3.9-G39
QSB3.9 Series
The Cummins QSB3.9-G39 is a 3.9-litre inline-4 diesel engine for generator sets, rated at 125 kVA / 100 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
Standby Power
125 kVA
Electrical Output
100 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 | 88.9 | 80 | 100 |
| Standby | 111.1 | 100 | 125 |
Mechanical & Electrical Specifications
| Brand | Cummins |
| Model | QSB3.9-G39 |
| Series | QSB3.9 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 QSB3.9-G39?
The Cummins QSB3.9-G39 is rated at 125 kVA standby / 100 kVA prime at 50 Hz (1,500 rpm).
Does the QSB3.9-G39 run at 50 Hz or 60 Hz?
The Cummins QSB3.9-G39 is rated for 50 Hz (1,500 rpm).
What fuel does the Cummins QSB3.9-G39 use?
The Cummins QSB3.9-G39 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QSB3.9-G39?
The Cummins QSB3.9-G39 is an inline-4 (4-cylinder) engine with a displacement of 3.9 L.
Is the Cummins QSB3.9-G39 still in production?
Yes — the Cummins QSB3.9-G39 is a current production model.