Overview#
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.
Shared platform with the QAS 250#
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.
Our service experience#
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.
