Caterpillar · Cat D-Series GC (Diesel)

Cat D350 GC

350 kW standby / 315 kW prime · Diesel · Liquid-cooled

350 kW diesel standby generator from Cat's GC value-engineered line. C13 turbocharged inline-6 with simplified controls for commercial standby.

Standby power
350 kW / 315 kW prime
Voltage options
277/480V, 346/600V
Frequency / Phase
60 Hz · 3-phase
Engine
Caterpillar C13 · 12.5L
EPA / Emissions
Tier 4 Final
standbyCommercialHealthcaremanufacturing
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Overview#

The Cat D350 GC is a 350-kilowatt diesel standby generator that introduces the C13 engine to Cat's GC value-engineered line. The 12.5-liter inline-6 represents a significant step up in displacement, providing generous reserve capacity and strong transient response for demanding commercial applications.

C13 platform entry#

The C13 is Cat's mid-heavy diesel — 12.5 liters across six cylinders, used extensively in trucks, construction equipment, and power generation. The D350 GC brings this robust platform into the value-engineered line at 350 kW, filling the gap between the C9-based models and larger institutional generators.

Our service perspective#

The C13 is one of Cat's highest-volume engine platforms. Parts are readily available, and the inline-6 layout provides excellent access for routine service. At 350 kW, the engine runs well within its design limits, contributing to long service life.

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Estimate runtime for the Cat D350 GC

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

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Estimated runtime

10.6 hours(0.4 days)

Fuel consumption ≈ 18.90 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.

Frequently Asked Questions

What is the Cat D350 GC?
The D350 GC is Cat's 350 kW value-engineered diesel generator, introducing the C13 inline-6 engine (12.5L). The larger displacement provides excellent reserve capacity and step-load acceptance for hospitals, campuses, and manufacturing facilities.
What engine does the D350 GC use?
The Cat C13 — a 12.5-liter turbocharged-aftercooled inline-6 that's also used in Cat's on-highway trucks and heavy construction equipment. It's a proven, high-volume platform with excellent parts availability.

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