The Atlas Copco QAS 330 is the second-largest model in the QAS lineup, delivering 264 kW of prime power (330 kVA) from a John Deere 9.0-liter inline-six diesel at 1,800 RPM. It shares the same enclosure platform and 385-gallon fuel tank as the QAS 250, providing approximately 25.6 hours of runtime at 75% load.
The Leroy Somer LSA 46.2 L9 alternator and AREP excitation system deliver clean, regulated power for demanding construction and temporary power applications. At 73 dBA, the QAS 330 maintains the same noise level as the smaller QAS 250 — a testament to Atlas Copco's Swedish sound engineering heritage.
The QAS 330 and QAS 250 share the same John Deere 6090HFG06 engine, enclosure, 385-gallon fuel tank, and 25-gallon DEF tank. The power increase from 200 kW to 264 kW comes from the alternator upgrade: the QAS 330 uses the Leroy Somer LSA 46.2 L9, a higher-output variant in the same frame family as the QAS 250's LSA 46.2 L6.
For fleet operators, this platform commonality across the 250 and 330 models means shared filters, fluids, enclosure components, and service procedures. Combined with the QAS 150/200 platform commonality on the 6068 engine, an Atlas Copco fleet can cover 120-264 kW with just two engine families (6068 and 6090) and highly overlapping parts inventories.
The QAS 330 pushes the John Deere 6090 platform close to its output ceiling in the QAS lineup. At 264 kW prime, the engine is working harder than in the QAS 250, which means adherence to maintenance intervals — particularly oil changes at 500 hours and fuel filter replacement — is critical for long-term reliability.
Atlas Copco's after-sale service weakness is especially impactful at this power level. Downtime on a 264 kW unit serving a construction site or data center is expensive, and the factory service network's pattern of unreturned calls and parts delays is not acceptable for critical applications. For QAS 330 owners in Northern California, OnPoint provides responsive local service for both routine maintenance and emergency repairs, with experience across the full QAS lineup including the shared 6090 platform.
Engineering specifications
Acoustic
Sound @ 7m, 75% load
73 dBA
Enclosure
Sound-attenuated
Fuel system & runtime
Integral fuel tank
385 gal
DEF tank
25 gal
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Get pricing & lead time on the Atlas Copco QAS 330
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Estimated runtime
24.6 hours(1.0 days)
Fuel consumption ≈ 15.66 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.
Service intervals
Manufacturer-recommended intervals for the Atlas Copco QAS 330 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Air filter
Every 500 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Common failure modes
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
Component
Symptom
Typical hours
Severity
Fuel filter
Restricted fuel flow, hard starting, power loss
500+
minor
Starting battery
Failed start or slow cranking after extended storage
4,380+
minor
Coolant hoses
Weeping at clamp joints, low coolant warning
5,000+
minor
Frequently Asked Questions
What is the prime and standby rating of the Atlas Copco QAS 330?
The QAS 330 delivers 264 kW prime power and 290 kW standby power. It is the second-largest model in the QAS portable lineup, sharing its John Deere 6090 platform and 385-gallon fuel tank with the QAS 250.
What engine does the Atlas Copco QAS 330 use?
The QAS 330 is powered by a John Deere 6090HFG06 9.0-liter inline-6 turbocharged-aftercooled diesel engine running at 1,800 RPM — the same engine as the QAS 250. The power increase from 200 kW to 264 kW comes from the larger Leroy Somer LSA 46.2 L9 alternator.
What are the service intervals for the QAS 330?
Oil changes are due every 500 hours or 12 months, whichever comes first. Air filter and fuel filter replacement intervals are 500 hours. Major engine overhaul is specified at 20,000 hours. The 25-gallon DEF tank requires periodic refill for Tier 4 Final SCR compliance.
Is the Atlas Copco QAS 330 EPA Tier 4 Final compliant?
Yes. The QAS 330 is EPA Tier 4 Final and CARB compliant, legal for operation throughout California. The John Deere 6090HFG06 uses DOC and SCR aftertreatment with a 25-gallon DEF tank integrated into the unit.
How does the QAS 330 compare to the QAS 410?
The QAS 410 steps up to a Scania DC13 085A 12.7-liter engine delivering 328 kW prime vs. the QAS 330's 264 kW. The QAS 410 uses a 412-gallon fuel tank and switches to three-phase-only 277/480V output. The QAS 330 still supports single-phase and multi-voltage configurations.
What fuel does the Atlas Copco QAS 330 use?
The QAS 330 runs on diesel with DEF required for SCR aftertreatment. The 385-gallon integral fuel tank provides approximately 25.6 hours of runtime at 75% load. The 25-gallon DEF tank is shared with the QAS 250.
Who services Atlas Copco generators in Northern California?
OnPoint Generators provides local service and maintenance for Atlas Copco QAS units including the John Deere 6090-powered QAS 250 and QAS 330. We serve the Bay Area and Northern California with technicians experienced in both routine maintenance and emergency repairs on the full QAS lineup.
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