Mitsubishi
Mitsubishi S4Q2-61SDB
S4Q2 Series
Mitsubishi S4Q2-61SDB 2.505L L4 constant-speed diesel engine for generator applications. Official MHI output without fan - 50 Hz: prime 19.6 kWm at 1485 rpm, standby 21.5 kWm at 1485 rpm. Emissions: Unregulated.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-23
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 23 kVA
- Electrical Output
- 18 kWe
- Cylinders
- L4
- Displacement
- 2.505 L
- Rated Speed
- 1,485 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf · kWe estimated — see note below
50 Hz1485 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 19.6 | 16.6 | 20.8 |
| Standby Power | 21.5 | 18.2 | 22.8 |
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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Mitsubishi S4Q2-61SDB overhaul & repair parts
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Mitsubishi S4Q2-61SDB generator set context
The Mitsubishi S4Q2-61SDB is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 23 kVA / 18 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 | Mitsubishi |
| Model | S4Q2-61SDB |
| Series | S4Q2 Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 2.505 L |
| Dry Weight | 195 kg |
| Dimensions (L×W×H) | 707 × 504 × 633 mm |
| 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 Mitsubishi S4Q2-61SDB?
The Mitsubishi S4Q2-61SDB is rated at 23 kVA standby / 21 kVA prime at 50 Hz (1,485 rpm).
Does the S4Q2-61SDB run at 50 Hz or 60 Hz?
The Mitsubishi S4Q2-61SDB is rated for 50 Hz (1,485 rpm).
What fuel does the Mitsubishi S4Q2-61SDB use?
The Mitsubishi S4Q2-61SDB is a diesel generator-set engine.
What is the displacement and cylinder configuration of the S4Q2-61SDB?
The Mitsubishi S4Q2-61SDB is an inline-4 (4-cylinder) engine with a displacement of 2.505 L.
What is the catalog status of the Mitsubishi S4Q2-61SDB?
The Mitsubishi S4Q2-61SDB 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 S4Q2-61SDB?
This page links reference documents for the Mitsubishi S4Q2-61SDB. Check each document's title, model coverage, revision and rating conditions before using it for selection.