SDEC
SDEC 4ZT4.1-G21
Z Series
The SDEC 4ZT4.1-G21 is a 4.1-litre inline-4 diesel engine for generator sets, rated at 74 kVA / 59 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
- Standby Power · 50 Hz
- 74 kVA
- Electrical Output
- 59 kWe
- Cylinders
- L4
- Displacement
- 4.1 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 | 60 | 54 | 67.5 |
| Standby Power | 65.6 | 59 | 73.8 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 70 | 63 | 78.8 |
| Standby Power | 76.7 | 69 | 86.3 |
Technical Specifications
| Brand | SDEC |
| Model | 4ZT4.1-G21 |
| Series | Z Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 4.1 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | China National Stage II / Unregulated |
| Country of Origin | China |
Frequently asked questions
What is the power output of the SDEC 4ZT4.1-G21?
The SDEC 4ZT4.1-G21 is rated at 74 kVA standby / 68 kVA prime at 50 Hz (1,500 rpm); and 86 kVA standby / 79 kVA prime at 60 Hz (1,800 rpm).
Does the 4ZT4.1-G21 run at 50 Hz or 60 Hz?
The SDEC 4ZT4.1-G21 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the SDEC 4ZT4.1-G21 use?
The SDEC 4ZT4.1-G21 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 4ZT4.1-G21?
The SDEC 4ZT4.1-G21 is an inline-4 (4-cylinder) engine with a displacement of 4.1 L.
Is the SDEC 4ZT4.1-G21 still in production?
Yes — the SDEC 4ZT4.1-G21 is a current production model.
Is a datasheet available for the 4ZT4.1-G21?
Yes — an official SDEC datasheet for the SDEC 4ZT4.1-G21 can be downloaded from this page.
Related Engines
Compare SDEC 4ZT4.1-G21
Reference
- Canonical page
- /engines/sdec-4zt4-1-g21
- Last database update
- 2026-05-29
- Manufacturer files
- 1 datasheet linked
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