Over 15 years experience of providing support of MEAN WELL Power Supplies
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Mean Well HLG-40H-42 Power Supply 40W 42V
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 ControlNone
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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 I use the HLG-40H-42 to power 42V LED panel lights?
Yes. The HLG-40H-42 delivers 40W at 42V in constant-current mode, which suits 42V LED panels commonly used in commercial and architectural lighting. Its CC voltage range of 25-42V also accommodates panels with slightly lower forward-voltage requirements during startup.
Is the HLG-40H-42 a good choice for outdoor 42V LED landscape lighting?
Yes. With an IP67 waterproof rating it can handle direct rain, sprinkler exposure, and ground-level moisture. The 40W output at 42V is well-suited for small landscape accent fixtures or path lights that run on a 42V bus.
Can the HLG-40H-42 drive 42V LED modules in a small light box or sign?
Yes, provided the total load does not exceed 40W. At 42V and 0.96A, it matches standard 42V LED module strings. The wide 90-305VAC input range accommodates most mains voltages worldwide, which is useful for commercial signage installations.
How many meters of 42V LED strip can the HLG-40H-42 support?
That depends on the strip's power consumption per meter. The HLG-40H-42 supplies up to 40W at 42V. For a strip rated at 8W/m you could run up to 5 meters (40W / 8W per meter = 5m). Always verify your strip's rated power per meter and keep total draw at or below 40W.
Can the HLG-40H-42 be left exposed to rain without an additional enclosure?
Yes. Its IP67 rating means the unit is sealed against dust and protected against temporary submersion in water up to 1 meter. It can be mounted outdoors without a secondary enclosure, even in heavy rain or sprinkler zones.
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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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