LJ5120K Quiet Air Compressor 5 Gallon
- Tank Volume: 5 gallons
- Capacity: 5 gallons
- Air Flow Capacity: 3 CFM
- Maximum Pressure: 120 psi
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A 110 volt, 5 gallon portable compressor for garage-scale air needs rather than continuous shop use.
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ASIN: B0DC6HB3B4Model: LJ5120KCategory: Air Compressors
Overview
The LJ5120K is a corded electric air compressor from Quiet, built around a 5 gallon tank and running on standard 110 volt household power. It fits garage and workshop users who need portable compressed air without a 220 volt hookup.
A 5 gallon tank puts this compressor in the portable category rather than the stationary shop class, useful for brad nailing, inflation and short bursts of air tool use rather than continuous spray finishing. Running on 110 volt AC means it plugs into a normal outlet, at the cost of the extra reserve a larger tank would give. Quiet's naming suggests reduced noise is a selling point, though no decibel figure is given in this data.
- Corded electric, 110 volt AC
- 5 gallon tank
- Portable garage-class compressor
Who it's for
Fits users who need compressed air for trim nailing, tire and sports equipment inflation, or occasional air tool use in a garage. Less suited to anyone running air tools continuously or needing a large-tank shop compressor.
Pros and cons
- Runs on standard 110 volt outlets
- 5 gallon tank in a portable size class
- No decibel or noise rating listed despite the Quiet name
- Tank size limits continuous air tool use
Performance notes
Tank size governs how long a compressor can supply air before the motor has to cycle back on, and 5 gallons is enough for intermittent tasks like nailing or inflating but will cycle more often under continuous air tool draw. Corded 110 volt operation keeps it compatible with a standard household outlet rather than requiring dedicated shop wiring.
Specifications
| Brand | Quiet |
|---|---|
| Model | LJ5120K |
| Dimensions & fit | |
| Hose Length | 25 feet |
| Item Dimensions L X W X H | 22 × 11 × 19.1 inches |
| Capacity & performance | |
| Tank Volume | 5 gallonshigher than 55% of 34 air compressors |
| Capacity | 5 gallonshigher than 58% of 32 air compressors |
| Air Flow Capacity | 3 CFM |
| Noise | 70 dBlower than 56% of 33 air compressors |
| Power & efficiency | |
| Maximum Power | 1.2 hphigher than 74% of 32 air compressors |
| Maximum Horsepower | 1.2 hphigher than 70% of 24 air compressors |
| Power Source | Corded Electric |
| Voltage | 110 voltslower than 52% of 34 air compressors |
| Construction & materials | |
| Material Type | Alloy Steel |
| Color | White |
| Included components | |
| Unit Count | 1 |
| Included Components | 13 pieces air tool accessories kit, 25 ft PVC air hose, 5 gallon air tank, wheels kit |
| Other details | |
| Maximum Pressure | 120 psilower than 88% of 26 air compressors |
| Additional Features | Ultra Quiet |
| Recommended Uses For Product | Blow Cleaning |
| Style | Air Compressor With Kits |
Closest rivals on specs
California Air Tools CAT-4710W Quiet Air Compressor 4.7 Gallon- Maximum Power 1.2 vs 1 hp (+20%)
- Air Flow Capacity 3 vs 2 CFM (+50%)
- Maximum Horsepower 1.2 vs 1 hp (+20%)
California Air Tools CAT-4610AC Ultra Quiet Air Compressor- Noise 70 vs 60 dB (+17%)
- Maximum Power 1.2 vs 2 hp (-40%)
- Air Flow Capacity 3 vs 2 CFM (+50%)
Pancake Air Compressor Kit 6 Gallon 175 PSI- Noise 70 vs 82 dB (-15%)
- Maximum Power 1.2 vs 1.5 hp (-20%)
- Capacity 5 vs 6 gallons (-17%)
Frequently asked questions
What size tank does the Quiet LJ5120K have?
It has a 5 gallon tank.
Does the LJ5120K need special wiring?
No, it runs on standard 110 volt AC household power.
Is the LJ5120K meant for continuous air tool use?
Its 5 gallon tank is sized for intermittent tasks like nailing and inflation rather than continuous draw.