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Mean Well HLG-40H-42AB Power Supply 40W 42V - Adjustable and Dimmable
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Mean Well HLG-40H-42AB Power Supply 40W 42V - Adjustable and Dimmable
The HLG-40H is a 40W Mean Well power converter (input range: 90~305VAC).
Key Features
- ✓ Input voltage range: 90~305VAC
- ✓ DC output voltage adjustable ±10%
- ✓ 3.75KVAC reinforced I/O isolation
- ✓ Cooling by free air convection
- ✓ Protections: Short circuit / Over voltage / Over temperature
- ✓ Active PFC — meets international energy efficiency regulations
- ✓ Safety approvals: Note.8 SAFETY & EMC
- ✓ 3 years warranty
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BrandMean Well
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SeriesHLG Series
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Power Rating40 Watt
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Output Voltage42 Volt
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Rated Current0.96 Ampere
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Input Voltage90V~305V
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No of Output1
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Dimming Control10V PWM,1-10V,Built-in Potentiometer,Resistance
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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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Length6.73 in
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Width2.42 in
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Height1.45 in
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Weight1.61 lb
::specification::
Frequently Asked Questions
Can the HLG-40H-42AB dim 42V LED strips via a building automation system?
Yes. The HLG-40H-42AB accepts 1-10V and PWM dimming signals, making it compatible with most building automation and smart-lighting controllers. At 40W and 42V output, it can drive a small run of 42V LED strips with smooth brightness adjustment.
Is the HLG-40H-42AB a good choice for adjustable, dimmable 42V LED accent lighting?
Yes. It combines a built-in potentiometer for voltage/current trimming with a 1-10V/PWM dimming input, giving you both set-and-forget calibration and dynamic brightness control. The 40W capacity suits small accent-lighting installations such as cove lighting or display shelves.
Can I use the HLG-40H-42AB for a small dimmable 42V LED sign?
Yes. The 42V output at up to 0.96A matches standard 42V sign modules, and the dimming input allows day/night brightness scheduling. The adjustable output lets you fine-tune voltage to the exact module string, and the wide 90-305VAC input handles most commercial mains supplies.
How many meters of 42V LED strip can the HLG-40H-42AB drive?
That depends on the strip's wattage per meter. The HLG-40H-42AB delivers up to 40W at 42V. A strip rated at 8W/m could run up to 5 meters (40W / 8W per meter = 5m). Always check your strip's rated power per meter and keep combined load at or below 40W.
Can the HLG-40H-42AB be used in a semi-exposed outdoor environment?
Yes. Its IP65 rating protects against dust ingress and water jets from any direction, suitable for covered outdoor areas, soffits, and ventilated enclosures. For installations fully exposed to rain or standing water, consider the IP67-rated HLG-40H-42B instead.
What are the differences between the HLG-40H-42, 42A, 42AB, and 42B variants?
All four share the same 40W / 42V / 0.96A core specs. The base HLG-40H-42 has no adjustment or dimming and is IP67 waterproof. The -42A adds a potentiometer for output adjustment (IP65). The -42AB adds both adjustment and 1-10V/PWM dimming (IP65). The -42B adds dimming input only and retains IP67.
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Other HLG-40H Models
6 other models| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well HLG-40H-12B Power Supply 40W 12V - Dimmable | 40W | 12V | 3.33A | IP67 | $38.39 | View |
| Mean Well HLG-40H-24B Power Supply 40W 24V - Dimmable | 40W | 24V | 1.67A | IP67 | $33.90 | View |
| Mean Well HLG-40H-24A Power Supply 40W 24V - Adjustable | 40W | 24V | 1.67A | IP65 | $37.32 | View |
| Mean Well HLG-40H-12 Power Supply 40W 12V | 40W | 12V | 3.33A | IP67 | $34.41 | View |
| Mean Well HLG-40H-15B Power Supply 40W 15V - Dimmable | 40.5W | 15V | 2.67A | IP67 | $35.33 | View |
| Mean Well HLG-40H-15A Power Supply 40W 15V - Adjustable | 40W | 15V | 2.67A | IP65 | $37.32 | View |
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