Isuzu
Isuzu 4BG1T
BG1 Series
Isuzu 4BG1T 4.329L 4-cylinder diesel engine for generator sets. 52.8 kWe standby at 60Hz / 44 kWe at 50Hz. Used in Denyo DCA gensets. Direct Injected, Turbocharged.
Overhaul & repair parts- Manufacturer files
- 2 datasheets
- Last updated
- 2026-06-11
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 55 kVA
- Electrical Output
- 44 kWe
- Cylinders
- L4
- Displacement
- 4.329 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf · kWe estimated — see note below
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 44.4 | 40 | 50 |
| Standby Power | 48.9 | 44 | 55 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 53.3 | 48 | 60 |
| Standby Power | 58.7 | 52.8 | 66 |
Note: The manufacturer does not publish a separate kWe rating for this engine. kWe values shown are estimated from the rated mechanical output (kWm) using a conservative 90% alternator efficiency factor.
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Isuzu 4BG1T overhaul & repair parts
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Isuzu 4BG1T generator set context
The Isuzu 4BG1T is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 55 kVA / 44 kWe / standby 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 | Isuzu |
| Model | 4BG1T |
| Series | BG1 Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 4.329 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Japan |
Frequently asked questions
What is the power output of the Isuzu 4BG1T?
The Isuzu 4BG1T is rated at 55 kVA standby / 50 kVA prime at 50 Hz (1,500 rpm); and 66 kVA standby / 60 kVA prime at 60 Hz (1,800 rpm).
Does the 4BG1T run at 50 Hz or 60 Hz?
The Isuzu 4BG1T is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Isuzu 4BG1T use?
The Isuzu 4BG1T is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 4BG1T?
The Isuzu 4BG1T is an inline-4 (4-cylinder) engine with a displacement of 4.329 L.
What is the catalog status of the Isuzu 4BG1T?
The Isuzu 4BG1T 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 4BG1T?
This page links reference documents for the Isuzu 4BG1T. Check each document's title, model coverage, revision and rating conditions before using it for selection.