Jenbacher
Jenbacher J420
Type 4
Jenbacher J420 Type 4 lean-burn natural-gas engine for generator and CHP service. Jenbacher publishes up to 1,562 kWe at 50 Hz and 1,427 kWe at 60 Hz at generator terminals, with electrical efficiency up to 44.1%. Output and emissions depend on gas quality, NOx configuration, voltage and site conditions; the published NOx variants are not an EPA Tier or EU Stage engine certification.
Overhaul & repair parts- Manufacturer files
- 3 datasheets
- Last updated
- 2026-07-24
- Package route
- gas generator sets
- Prime Power · 50 Hz
- 1,953 kVA
- Electrical Output
- 1,562 kWe
- Cylinders
- V20
- Displacement
- 61.1 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 | — | 1562 | 1952.5 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 1427 | 1783.8 |
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Jenbacher J420 generator set context
The Jenbacher J420 is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 1,953 kVA / 1,562 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 | Jenbacher |
| Model | J420 |
| Series | Type 4 |
| Configuration | V20 |
| Cylinders | 20 |
| Displacement | 61.1 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Austria |
Frequently asked questions
What is the power output of the Jenbacher J420?
The Jenbacher J420 is rated at 1,953 kVA prime at 50 Hz (1,500 rpm); and 1,784 kVA prime at 60 Hz (1,800 rpm).
Does the J420 run at 50 Hz or 60 Hz?
The Jenbacher J420 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Jenbacher J420 use?
The Jenbacher J420 is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the J420?
The Jenbacher J420 is a V20 (20-cylinder) engine with a displacement of 61.1 L.
What is the catalog status of the Jenbacher J420?
The Jenbacher J420 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 J420?
This page links reference documents for the Jenbacher J420. Check each document's title, model coverage, revision and rating conditions before using it for selection.