The Castair I538HC1-S is an 8-series three-phase industrial air compressor with a 5HP motor, horizontal tank, and factory-mounted magnetic starter. The 38-series designation puts this in Castair's larger tank, three-phase category — combining the efficiency of three-phase motor operation with more stored air volume than the 33-series provides. The mounted starter handles overload protection and simplifies installation on a three-phase panel.
Note: Manufacturer specification sheets for this model were not available at time of publication. Contact us for confirmed CFM output, operating PSI, and exact tank capacity before ordering.
Key Features
- 5 HP Three-Phase Motor: More efficient and smoother than single-phase — built for commercial duty cycles
- Three-Phase Power: Requires three-phase electrical service
- Larger Horizontal Tank (38-series): More stored air than the 33-series — supports higher or more sustained air demand
- Factory-Mounted Magnetic Starter: Overload protection included; wire to your three-phase panel without additional hardware
- Cast Iron Industrial Pump: Built for sustained commercial operation
- Industrial Series Grade: Castair commercial tier
Technical Specifications
- Horsepower: 5 HP
- Phase: Three-phase (3-phase)
- Tank Orientation: Horizontal
- Starter: Mounted magnetic starter included
- Model: I538HC1-S
- Series: Industrial
- Voltage: 208V/230V/460V three-phase (confirm supply voltage at order)
- CFM / PSI / Tank Size: Contact us — manufacturer spec sheet not yet available online
What This Compressor Handles
- Three-phase shops where the 33-series tank was not enough stored volume
- Multi-tool environments with higher peak air demand
- Body shops, fleet service centers, and light manufacturing on three-phase power
- Facilities that want to step up tank capacity without moving to a larger motor
Why Buy From OEM Diagnostic Tools?
We have worked with professional shops on compressor selection since 2016 and carry the full Cast Air three-phase horizontal lineup from 33-series to 38-series. We can help you determine whether the larger tank is justified for your actual demand. Free shipping, full warranty, and pre-sale guidance on every order.
Call for pricing and availability.
Call 866-217-0063 for quick answers and help!

