Mitsubishi
Mitsubishi S12A2-PTA
S12A2 Series
Mitsubishi S12A2-PTA 33.930L V12 constant-speed diesel engine for generator applications. Official MHI output without fan - 50 Hz: prime 679 kWm at 1500 rpm, standby 746 kWm at 1500 rpm; 60 Hz: prime 761 kWm at 1800 rpm, standby 850 kWm at 1800 rpm. Emissions: Unregulated.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-23
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 886 kVA
- Electrical Output
- 709 kWe
- Cylinders
- V12
- Displacement
- 33.93 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 | 679 | 644.8 | 806 |
| Standby Power | 746 | 708.8 | 886 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 761 | 723.2 | 904 |
| Standby Power | 850 | 807.2 | 1009 |
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 S12A2-PTA overhaul & repair parts
Already running a Mitsubishi S12A2-PTA? Start with the parts you need, then send your nameplate so we can help check the right references for your engine.
Reviewed part-number references
A starting point for identification. Fitment must be confirmed before ordering.
- Turbocharger49181-03720
Turbocharger assembly
Fitment check: Match the exact MTEA Engine Type label S12A2-PTA; use the complete engine serial number and current MEeS illustration to select among all listed turbocharger numbers before ordering
Source: Mitsubishi Turbocharger and Engine America official catalog - 49181-03720-Turbocharger
Selected references only; this is not a complete overhaul list or a stock listing.
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Mitsubishi S12A2-PTA generator set context
The Mitsubishi S12A2-PTA is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 886 kVA / 709 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 | S12A2-PTA |
| Series | S12A2 Series |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 33.93 L |
| Dry Weight | 3400 kg |
| Dimensions (L×W×H) | 2060 × 1382 × 1542 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 S12A2-PTA?
The Mitsubishi S12A2-PTA is rated at 886 kVA standby / 806 kVA prime at 50 Hz (1,500 rpm); and 1,009 kVA standby / 904 kVA prime at 60 Hz (1,800 rpm).
Does the S12A2-PTA run at 50 Hz or 60 Hz?
The Mitsubishi S12A2-PTA is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Mitsubishi S12A2-PTA use?
The Mitsubishi S12A2-PTA is a diesel generator-set engine.
What is the displacement and cylinder configuration of the S12A2-PTA?
The Mitsubishi S12A2-PTA is a V12 (12-cylinder) engine with a displacement of 33.93 L.
What is the catalog status of the Mitsubishi S12A2-PTA?
The Mitsubishi S12A2-PTA 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 S12A2-PTA?
This page links reference documents for the Mitsubishi S12A2-PTA. Check each document's title, model coverage, revision and rating conditions before using it for selection.