Hatz
Hatz 1D81C
1D Series
Hatz 1D81C 0.667L (approx.) 1-cylinder diesel engine for generator sets. 4.2 kWe standby at 50Hz / 5.1 kWe at 60Hz. U.S. EPA Tier 4 Interim. Air-cooled.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-06-11
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 5 kVA
- Electrical Output
- 4 kWe
- Cylinders
- L1
- Displacement
- 0.667 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 | 4.2 | 3.8 | 4.7 |
| Standby Power | 4.7 | 4.2 | 5.3 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 5.1 | 4.6 | 5.7 |
| Standby Power | 5.7 | 5.1 | 6.4 |
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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Hatz 1D81C generator set context
The Hatz 1D81C is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 5 kVA / 4 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 | Hatz |
| Model | 1D81C |
| Series | 1D Series |
| Configuration | L1 |
| Cylinders | 1 |
| Displacement | 0.667 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Air-Cooled |
| Emissions Standard | U.S. EPA Tier 4 Interim |
| Country of Origin | Germany |
Frequently asked questions
What is the power output of the Hatz 1D81C?
The Hatz 1D81C is rated at 5 kVA standby / 5 kVA prime at 50 Hz (1,500 rpm); and 6 kVA standby / 6 kVA prime at 60 Hz (1,800 rpm).
Does the 1D81C run at 50 Hz or 60 Hz?
The Hatz 1D81C is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Hatz 1D81C use?
The Hatz 1D81C is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 1D81C?
The Hatz 1D81C is an inline-1 (1-cylinder) engine with a displacement of 0.667 L.
What emissions information is listed for the 1D81C?
This record lists U.S. EPA Tier 4 Interim for the Hatz 1D81C. Confirm the exact engine family, model year, configuration and applicable manufacturer certification documents before specifying it for a regulated project. A database label does not establish certification of a complete generator package.
What is the catalog status of the Hatz 1D81C?
The Hatz 1D81C 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 1D81C?
This page links reference documents for the Hatz 1D81C. Check each document's title, model coverage, revision and rating conditions before using it for selection.