Over 15 years experience of providing support of MEAN WELL Power Supplies
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Mean Well HLG-120H-42A Power Supply 120W 42V - Adjustable
The HLG-120H is a 120W Mean Well power converter (input range: 90~305VAC, operating temperature: -40~+80℃).
Key Features
- ✓ Input voltage range: 90~305VAC
- ✓ DC output voltage adjustable ±10%
- ✓ 3.75KVAC reinforced I/O isolation
- ✓ Cooling by free air convection
- ✓ Wide operating temperature: -40~+80℃
- ✓ Protections: Short circuit / Over voltage / Over temperature
- ✓ Active PFC — meets international energy efficiency regulations
- ✓ Safety approvals: Note.8 SAFETY &
- ✓ 3 years warranty
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BrandMean Well
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SeriesHLG Series
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Power Rating120 Watt
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Output Voltage42 Volt
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Rated Current2.9 Ampere
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Input Voltage90V~305V
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No of Output1
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Dimming ControlBuilt-in Potentiometer
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Standards MetCB,CCC,CE,EAC,PSE,RCM,TUV,UL
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Operation ModeConstant Current,Constant Voltage
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Operating Temperature-40°C~80°C
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Warranty7 Year
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Length8.66 in
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Width2.68 in
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Height1.53 in
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Weight2.47 lb
::specification::
Frequently Asked Questions
Can I use the HLG-120H-42A to fine-tune the voltage for a 42V LED panel array?
Yes. The HLG-120H-42A includes a built-in potentiometer that lets you adjust the output voltage and current within the 21-42V CC range. This is useful when you need to match the driver precisely to a specific 42V LED panel or module string for optimal brightness and efficiency.
Is the HLG-120H-42A suitable for indoor commercial 42V LED troffer installations?
Yes. At 120W and 42V with adjustable output, the HLG-120H-42A can drive 42V LED troffers and panel lights in office or retail ceilings. The IP65 water-resistant rating handles above-ceiling environments where dust and occasional condensation are present.
Can the HLG-120H-42A power 42V LED modules in a large backlit sign or display?
Yes. With 120W at 42V, the HLG-120H-42A provides enough power for a substantial array of 42V LED sign modules. The adjustable output allows you to dial in the exact operating point, and the 90-305VAC input accommodates most commercial mains supplies worldwide.
How many meters of 42V LED strip can the HLG-120H-42A drive?
Divide 120W by your strip's power consumption per meter. For example, a 42V strip rated at 12W/m allows up to 10 meters (120W / 12W per meter = 10m). Always check your strip's rated power per meter and keep total load at or below 120W.
Is the HLG-120H-42A appropriate for a covered parking structure or carport?
Yes. The IP65 rating protects against dust and low-pressure water jets from any direction, which is sufficient for sheltered outdoor or semi-enclosed environments like parking garages, carports, and covered walkways. For fully exposed outdoor locations with heavy rain, an IP67-rated variant such as the HLG-120H-42 or HLG-120H-42B is recommended.
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Other HLG-120H Models
1 other model| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well HLG-120H-15A Power Supply 120W 15V - Adjustable | 120W | 15V | 8A | IP65 | $54.29 | View |
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