Description
Airman SDG125S-8E1 Mobile Diesel Generator Overview
The Airman SDG125S-8E1 is a trailer-mounted mobile diesel generator rated at 125 kVA prime and 137.5 kVA standby. It switches between three-phase and single-phase output and runs on a Tier 4 Final Isuzu BR-4HK1X engine. The manufacturer positions it for construction, disaster relief and off-grid operations where high output and long runtime are needed.
At full load it runs for 23.3 hours. Smartload Load Bank technology handles load management, CamLock connections allow quick, secure setup, and a lockable voltage selector switch adds flexibility while helping keep operation safe. Two-way auxiliary fuel tank piping lets you connect an external tank, which makes sense for remote sites that need continuous power.
To help the generator start and run in varied conditions, it includes a battery disconnect, an engine block heater and an onboard battery charger. The integrated trailer has a GVWR of 8,352 lb and weighs 1,650 lb on its own, and the full list of electrical and physical specifications appears in the table below.
Single-phase voltages run from 120V up to 277V and three-phase voltages from 208V up to 480V, with rated three-phase current of 328 A at 208V, 300 A at 240V and 150 A at 480V. The fuel tank holds 168 gallons. Operating weight is 6,702 lb and dry weight is 5,379 lb, and the unit measures 113 x 51 x 73 inches without the trailer.
Key Features
- 125 kVA prime and 137.5 kVA standby ratings
- Tier 4 Final Isuzu BR-4HK1X diesel engine producing 147.9 HP at 1,800 RPM
- 23.3 hours of runtime at full load
- Smartload Load Bank system for managing changing loads
- CamLock connection panel and lockable voltage selector switch
- Two-way auxiliary fuel piping for connecting external tanks
- Battery disconnect, engine block heater and onboard battery charger
Who It’s For
Aimed at crews and organizations that need movable three-phase or single-phase power on construction sites, in disaster response or at remote locations, especially where an external fuel tank may be added for longer operation.
Specifications
| Model Number | SDG125S-8E1 |
| Prime Power | 125 kVA / 100 kW |
| Standby Power | 137.5 kVA / 110 kW |
| Engine | Isuzu BR-4HK1X: 147.9 HP @ 1,800 RPM |
| Voltage: Single Phase | 120V / 127V / 139V / 240V / 254V / 277V |
| Voltage: Three Phase | 208V / 220V / 240V / 416V / 440V / 480V |
| Amperage: 3 Phase 208V | 328 A |
| Amperage: 3 Phase 240V | 300 A |
| Amperage: 3 Phase 480V | 150 A |
| Amperage: 1 Phase 240V | 300 A |
| Runtime @ Full Load | 23.3 hours |
| Fuel Tank Capacity | 168 gal |
| EPA Emission Level | Tier 4 Final |
| Operating Weight | 6,702 lbs |
| Dry Weight | 5,379 lbs |
| GVWR | 8,352 lbs |
| Trailer Weight | 1,650 lbs |
| Dimensions (W/O Trailer) | 113″ L x 51″ W x 73″ H |
| Dimensions (With Trailer) | 196″ L x 79″ W x 85″ H |
| Warranty | Manufacturer Warranty |
| Prop 65 | WARNING: Cancer and Reproductive Harm: www.P65Warnings.ca.gov |
Buying advice: read our guide to how long a generator can run, or compare all diesel generators.
Reviews
There are no reviews yet.