Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 125 kW |
| Standby kVA | 156 |
| Prime power | 112.5 kW |
| Emissions | EPA Tier 3 |
| Controller | PowerCommand 1.1, PowerCommand 1.1 (standard); PowerCommand 2.3 optional, PowerCommand 2.3 |
| Oil capacity | 12.2 L |
| Voltage options | 120/240 V, 120/208 V, 277/480 V, 347/600 V, 127/220 V |
| Phase | 1-phase and 3-phase |
| Rated current | 521 A |
| Battery cranking | 850 CCA |
| Battery voltage | 12 (2 x 12 volt in parallel, negative ground) V |
| Battery quantity | 2 |
| Coolant capacity | 16 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2482×1016×1321 mm |
| Dry weight | 1173 kg |
| Wet weight | 1173 kg |
Engine
| Displacement | 4.5 L |
|---|---|
| Aspiration | Turbocharged and charge air cooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan QSB5 Series| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | ||||
| Spark plug | — |
Service specifications
15| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | AFLEX-H (shake table test datum) | <=3.200 | g | AC156, tri-axial, 5% damping SRS |
| Other | AFLEX-V (shake table test datum) | <=1.333 | g | AC156, tri-axial, 5% damping SRS |
| Other | ARIG-H (shake table test datum) | <=2.400 | g | AC156, tri-axial, 5% damping SRS |
| Other | ARIG-V (shake table test datum) | <=0.533 | g | AC156, tri-axial, 5% damping SRS |
| Other | Ground snow load limit | 30 | psf | For indoor (covered) and outdoor (exposed) installation |
| Other | Horizontal design seismic coefficient (z/h = 0.0) | 1.440 | g | Certified seismic design level, IBC Importance IP <= 1.5, Soil Classes A-E, Risk Categories I-IV, Design Categories A-F, SDS <= 2.000 g |
| Other | Random frequency variation | 0.5 | % | |
| Other | SDS (g) at z/h=1 for C10 D6 - C60 D6 | 2.0 | g | Certified SDS, z/h = 1 |
| Other | SDS (g) at z/h=1 for C50 D6C - C125 D6C | 2.5 | g | Certified SDS, z/h = 1 |
| Other | ZPA-H (shake table test datum) | <=2.160 | g | AC156, tri-axial, 5% damping SRS |
| Other | ZPA-V (shake table test datum) | <=0.480 | g | AC156, tri-axial, 5% damping SRS |
| Speed | Rated speed | 1800 | rpm | |
| Temperature | Alternator standard temperature rise | 120 | C | Standby |
| Voltage | Random voltage variation | 1.0 | % | |
| Voltage | Voltage regulation, no load to full load | 1.0 | % | no load to full load |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Cummins/Onan C125 D6C?
The Cummins/Onan C125 D6C is rated 125 kW standby (156.0 kVA).
Which engine powers the Cummins/Onan C125 D6C?
The Cummins/Onan C125 D6C is powered by the Cummins/Onan QSB5 Series engine.
What fuel does the Cummins/Onan C125 D6C use?
The Cummins/Onan C125 D6C runs on diesel.
How much coolant does the Cummins/Onan C125 D6C hold?
The Cummins/Onan C125 D6C cooling system holds 16 liters (4.2 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
How much oil does the Cummins/Onan C125 D6C take?
The Cummins/Onan C125 D6C has an engine oil capacity of 12.2 liters (12.9 US quarts), per the manufacturer specification sheet.
What is the continuous rating of the Cummins/Onan C125 D6C?
The Cummins/Onan C125 D6C is rated 112.5 kW prime (141 kVA), against 125 kW standby.
How much does the Cummins/Onan C125 D6C weigh?
The Cummins/Onan C125 D6C has a dry weight of 1173 kg (2586 lb).
What voltages is the Cummins/Onan C125 D6C available in?
The Cummins/Onan C125 D6C is offered in 120/240 V, 120/208 V, 277/480 V, 347/600 V, 127/220 V, 1-phase and 3-phase-phase.
What battery does the Cummins/Onan C125 D6C use?
The Cummins/Onan C125 D6C uses 2 batteryies, 12 (2 x 12 volt in parallel, negative ground) V each, 850 CCA, per the manufacturer specification sheet.
Parts
1| Part # | Description | Qty | System | |
|---|---|---|---|---|
| AC156 | ISO 17025 Laboratory | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 25% | 11.36 | 3.0 |
| Prime | 50% | 21.2 | 5.6 |
| Prime | 75% | 31.8 | 8.4 |
| Prime | 100% | 35.2 | 9.3 |
| Standby | 25% | 12.49 | 3.3 |
| Standby | 50% | 23.09 | 6.1 |
| Standby | 75% | 31.42 | 8.3 |
| Standby | 100% | 38.99 | 10.3 |
Available documents
This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.