Yunnei
Yunnei DEF20NKA4
DEF20 Series
The Yunnei DEF20NKA4 is a 2-litre inline-4 diesel engine for generator sets, rated at 21 kVA / 17 kWe prime power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China. It meets Euro Stage V emissions standards.
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- Manufacturer files
- 2 datasheets
- Last updated
- 2026-05-29
- Package route
- diesel generator sets
- Prime Power · 50 Hz
- 21 kVA
- Electrical Output
- 17 kWe
- Cylinders
- L4
- Displacement
- 2 L
- Rated Speed
- 1,500 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 18.9 | 17 | 21.3 |
Yunnei DEF20NKA4 generator set context
The Yunnei DEF20NKA4 is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 21 kVA / 17 kWe / prime 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 | Yunnei |
| Model | DEF20NKA4 |
| Series | DEF20 Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 2 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Euro Stage V |
| Country of Origin | China |
Frequently asked questions
What is the power output of the Yunnei DEF20NKA4?
The Yunnei DEF20NKA4 is rated at 21 kVA prime at 50 Hz (1,500 rpm).
Does the DEF20NKA4 run at 50 Hz or 60 Hz?
The Yunnei DEF20NKA4 is rated for 50 Hz (1,500 rpm).
What fuel does the Yunnei DEF20NKA4 use?
The Yunnei DEF20NKA4 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the DEF20NKA4?
The Yunnei DEF20NKA4 is an inline-4 (4-cylinder) engine with a displacement of 2 L.
What emissions standard does the DEF20NKA4 meet?
The Yunnei DEF20NKA4 is certified to Euro Stage V emissions standards.
Is the Yunnei DEF20NKA4 still in production?
Yes — the Yunnei DEF20NKA4 is a current production model.
Is a datasheet available for the DEF20NKA4?
Yes — an official Yunnei datasheet for the Yunnei DEF20NKA4 can be downloaded from this page.