The Cummins Onan C1250 D6 generator is listed with standby output of 1120 kW, Diesel fuel, 60 Hz operation, 8 available voltage configurations, and A (U) / B (V) / C (W).
Generator • Diesel • 60 Hz • A (U) / B (V) / C (W)
Key specifications
Useful generator charts
Charts are shown only when this model has enough usable source data.
55.3 kW
55.6 kW
1,120 kW
1,120 kW
How the Cummins Onan C1250 D6 compares
This compares the supplied numeric specification with Cummins Onan generators in the same broad standby-power class where enough comparable data exists.
About 39% below the similar-output Cummins Onan average. Around the 14th percentile for this field.
About 33% below the similar-output Cummins Onan average. Around the 25th percentile for this field.
About 77% below the similar-output Cummins Onan average. Around the 13th percentile for this field.
Generator information
| Manufacturer | Cummins Onan |
|---|---|
| Model | C1250 D6 |
| Generator type | Generator |
| Fuel | Diesel |
| Frequency | 60 Hz |
Electrical output
| Standby power | 1120 kW |
|---|---|
| Prime power | 1120 kW |
| Standby kVA | 1270.0 |
| Voltage options | 219/380 V, 2400/4160 V, 254/440 V, 7200/1247 V, 277/480 V, 7620/1320 V, 347/600 V, 7970/1380 V |
| Phase | A (U) / B (V) / C (W) |
Engine, cooling and controls
| Engine model | Cummins/Onan KTA50 series |
|---|---|
| Engine displacement | 3, 051 cu in (50 L) |
| Aspiration / cooling | turbocharged and after-cooled |
| Rated engine speed | 50 rpm |
| Engine oil capacity | 11.8 gal (44.7 L) |
| Engine coolant capacity | 91.9 gal (348 L) |
| Oil capacity | 11.8 gal (44.7 L) |
| Controller | PowerCommand, PowerCommand 3.3 |
Physical specifications
| Dry weight | 20, 260 lb (9, 190 kg) |
|---|---|
| Dimensions (L × W × H) | 201 × 78.7 × 88.1 in (5105 × 2000 × 2238 mm) |
Battery
| Battery cranking | 1800 CCA |
|---|
Maintenance and service parts
| Engine oil | Interval: 3600 hr; Specification: 5W-40; Capacity: 160.0 L |
|---|---|
| Oil filter | Part number: LF3325 |
| Fuel filter | Part number: FS1006 | —; Interval: 1800 hr; Specification: Dual spin on paper element fuel filters with standard water separator |
| Air filter | Interval: 3600 hr; Specification: Dry replaceable element |
| Coolant | Interval: 3600 hr; Specification: 50/50 Ethylene Glycol and Water; Capacity: 12.7 L |
Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Cummins North America generator website.