VIAIR 300P Portable Compressor (30033)


VIAIR’s 300P is a larger portable compressor kit with a 150 psi rating that is capable of inflating up to 33-inch tires easily. Simply clamp the power leads to your battery, connect the tire chuck to the valve stem, and turn the unit on.


VIAIR’s 300P is a larger portable compressor kit with a 150 psi rating that is capable of inflating up to 33-inch tires easily. Simply clamp the power leads to your battery, connect the tire chuck to the valve stem, and turn the unit on. Monitor the tire pressure using the 5-in-1 inflator/deflator inline pressure gauge. This VIAIR 300P compression system includes a range of accessories stowable in its soft carry case, including the following:

  • Inflation tips
  • 5-in-1 inflator/deflator
  • Open ended air hose with 100 psi gauge
  • Dual heavy duty direct battery clamps

Powerful Portable Compression Rated for 33″ Tires

The VIAIR 300P Portable Compressor offers inflation of up to 33-inch tires at a rapid rate. Operate the compressor up to 150 psi for up to 15 continuous minutes at a time, providing that there are 30 minutes provided afterwards to cool the unit. The unit is powered by an easy to establish temporary connection to a 12-volt battery power source via included alligator clamps.


The 300P comes with an open-ended tire inflation hose with a 100 psi air pressure gauge that offers the following functions: air up, air up intermittently, air down, air down intermittently, and check tire pressure. To check tire pressure, simply turn off the portable compressor to halt inflation and check the pressure on the air pressure gauge. Additional parts provided include an inline fuse holder, a 8′ power cable, a heavy duty sand tray with vibration isolators, and a deluxe carry bag.


  • Motor voltage: 12 volt
  • Motor type: Permanent magnetic
  • Max. duty cycle: 33% @ 100 psi
  • Max. working pressure: 150 psi
  • Max. Amp draw: 28 Amps
  • Continuous use @ 72°F & 30 psi: 40 min
  • Max. ambient temperature: 158°F
  • Min. ambient temperature: -40°F
  • CFM @ 0 PSI: 2.40
  • Fuse: 40 Amps
  • Inline pressure gauge: 100 psi
  • Auto. Reset thermal protection: Yes
  • Dimensions: 9.80″L x 4.90″W x 7.50″H
  • Net weight: 8.60 lbs

About Compressor Duty Cycle

Compressor duty cycle refers to the amount of time a compressor can run in a given time period, at 100 psi and at a standard ambient temperature of 72°F. Duty Cycle is commonly expressed in percentile as: compressor on time (compressor on time + off time) %.

As an example, a compressor that is rated for 25% duty cycle means that compressor can be operated at: 100 psi @ 72°F for 10 minutes on and 30 minutes off. 10 min. on / (10 min. on + 30 Min. off) = 10 min. / 40 Min = 25% duty cycle.

What’s in the Box:

  • 1-VIAIR 300P portable air compressor
  • 1-Deluxe zippered carry bag with storage compartments
  • 1-25′, 5-in-1 inflator/deflator open ended air hose with 120 psi gauge
  • 1-Heavy duty sand tray with vibration isolators
  • 1-Set of dual heavy duty direct battery clamps
  • 1-8′ power cable
  • 1-3 piece inflation tips kit
  • 1-Inline fuse holder
  • 1-Owner’s manual

VIAIR Corporation warrants this product, when properly installed and under normal conditions of use, to be free from defects in workmanship and materials for a period of one (1) year from its original date of purchase. This warranty covers product defects only. It does not cover incidental or consequential damages as a result of misuse or abuse.

Heavy Duty Compressors for Tire Inflation: The VIAIR 300P-450P

You can use VIAIR’s heavy duty portable tire inflators on any vehicle with a 12v battery source, and with tires ranging from 33″ to 42″ diameter.

These compressors work for both on-road and off-road vehicles.

VIAIR’s Automatic Tire Inflatiors make tire filling simple! While most portable air compressors must be turned off between tire fills and checking tire pressure, these automatic compressors only operate while the trigger on the inflation gun is pulled. This will certainly save you much needed time, making the overall process of filling your tires seem effortless.

For those in the off-road segment, air down tires allows for better traction while off-roading. Once your tires need to get back to their normal pressures, you simply hook the compressor up to your battery, and fill them to the recommended on-road pressure your vehicle suggests.

For those in the on-road segment, proper tire inflation is important because it helps keep your tires lasting longer. Moreover, proper tire pressure is  better for gas mileage. Proper tire mantenance overall makes for a better ride while keeping you safe on the road.

Additional information

Weight 8.7 lbs
Dimensions 10 × 7.5 × 5 in




Item Weight

8.7 pounds

Product Dimensions

10 x 7.5 x 5 inches

Country of Origin


Item model number




Manufacturer Part Number


OEM Part Number


Special Features

Amp Draw: 28 amps Compressor: Light Duty Dimensions: Viair 30033 Dimensions. Duty Cycle: 33 percent Max PSI: 150 Performance Data: Viair 30033 Performance and Tire Fill Rate data.


30 Amps


12 Volts DC


Viair Corporation


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