Constant Voltage Power Supplies
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Magnitude VersaDrive 5-way Universal Dimmable Constant Voltage LED Power Supply - 300W - 24VDC Magnitude VersaDrive 5-way Universal Dimmable Constant Voltage LED Power Supply - 300W - 24VDCShowHide specs
- Input Voltage
- 120-277 VAC
- Output Voltage
- 24 VDC
- Output Power
- 300 Watts
- Water Resistance
- Weatherproof
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Magnitude VersaDrive 5-way Universal Dimmable Constant Voltage LED Power Supply - 288W - 24VDC Magnitude VersaDrive 5-way Universal Dimmable Constant Voltage LED Power Supply - 288W - 24VDCShowHide specs
- Input Voltage
- 120-277 VAC
- Output Voltage
- 24 VDC
- Output Power
- 340 Watts
- Water Resistance
- Weatherproof
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Dimmable LED Driver - 60W-150W Power Supply - Waterproof - 36V Dimmable LED Driver - 60W-150W Power Supply - Waterproof - 36VShowHide specs
- Input Voltage
- 120-277 VAC
- Output Voltage
- 36 VDC
- Output Power
- 60 Watts, 100 Watts, 150 Watts
- Water Resistance
- Waterproof
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Dimmable LED Driver -Power Supply - Waterproof - 48V Dimmable LED Driver -Power Supply - Waterproof - 48VShowHide specs
- Input Voltage
- 120-277 VAC
- Output Voltage
- 48 VDC
- Output Power
- 60 Watts, 100 Watts, 150 Watts
- Water Resistance
- Waterproof
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Mean Well LED Switching Power Supply - PWM Series 40-200W LED Power Supply - 36V Dimmable Mean Well LED Switching Power Supply - PWM Series 40-200W LED Power Supply - 36V DimmableShowHide specs
- Input Voltage
- 120-277 VAC
- Output Voltage
- 36 VDC
- Output Power
- 40 Watts, 90 Watts, 120 Watts, 200 Watts
- Water Resistance
- Waterproof
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Mean Well LED Switching Power Supply - PWM Series 60-200W LED Power Supply - 48V Dimmable Mean Well LED Switching Power Supply - PWM Series 60-200W LED Power Supply - 48V DimmableShowHide specs
- Input Voltage
- 120-277 VAC
- Output Voltage
- 48 VDC
- Output Power
- 60 Watts, 120 Watts, 200 Watts
- Water Resistance
- Waterproof
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Class 1
Class 1 LED drivers have output ranges outside UL Class 2 (UL 1310). Safety protection is required within the fixture (LED light) on Class 1 products. Class 1 circuits must be powered by a source with a maximum of 30V and 1 kVA.
Class 2
Class 2 power supplies must meet the National Electric Code (NEC) and Underwriters Laboratories (UL 1310) standards for wiring requirements and power limitations of AC/DC power supplies to minimize shock or fire risks. All Class 2 power supplies must meet the NEC overcurrent protection and wiring sizing regulations. They must be constructed with ‘In-Wall’ rated wiring for permanent installation inside walls or floors, where they may be surrounded by insulation. These wiring requirements help prevent cracking or melting of the wire, which could cause a fire hazard. These power supplies must have a maximum power capacity of 100 VA and cannot exceed a 30 VAC or 60 VDC output, minimizing the risk of electric shock or overheating from excessive currents.
Class II
Class II power supplies must follow the International Electrotechnical Commission IEC 61439-1 design. This code details that Class II power supplies must have two layers of insulation between the user and the internal current-carrying components to protect the user from electrical shock. The initial layer is "basic" insulation. The second double layer is a reinforcement layer that eliminates the need for a protective earth connection (earthing) or a ground connection since the power supply is grounded within the product's casing.
Why would I need a constant voltage power supply?
Constant voltage power supplies are suitable for powering LEDs equipped with resistors or constant current drivers, which regulate the flow of current and may require a constant-voltage power supply when the desired operating voltage differs from the available power source (such as in homes or vehicles).
For instance, LED light strips often incorporate current-regulating resistors. If the light strip operates within a range of 9-14.8 volts in direct current (DC), it can be directly connected to a 12-volt DC system in a vehicle without requiring a constant-voltage power supply. However, if you want to install the same light strip in a home with a 120-volt alternating current (AC) wiring system, you must reduce and convert the voltage from AC to DC using a power supply.
In certain cases, constant-current drivers are available that match the voltage and current requirements of both the product and the power source (home, vehicle, etc.), eliminating the need for a constant-voltage power supply.
What are the differences between a power supply and a driver?
A driver and a power supply are the same thing. These terms are used interchangeably. Drivers tend to refer more to constant current power supplies.
What features are available with constant voltage power supplies?
Dimmable
Certain power supplies and drivers are compatible with TRIAC and other dimmers. If you wish to dim your LEDs, purchase a compatible power supply that allows you to dim 0-100%.
Plug-In
These are 120V and plug into a home’s outlet after being connected to the LED via a barrel connector.
Waterproof
Waterproof voltage power supplies help power outdoor and underwater LEDs in pools, fountains, etc.
What types of LEDs would require a constant voltage power supply?
The most common use for constant voltage power supplies is LED strip lights.
What are the benefits of using a constant voltage power supply?
Constant voltage supplies provide a consistent voltage across the LEDs so that minimal voltage drop ensures all your LEDs work properly and effectively.
What is the difference between NEC Class 2 and IEC Class II?
NEC Class 2 refers to the output voltage and power of AC/DC power supplies. So it focuses on wiring details like wire size, derating factors, installation, and overcurrent protection limits. Class 2 power supplies are considered less of a fire hazard and have less risk of causing electrical shocks.
On the other hand, IEC Class II refers to the internal construction of the power supply and its electrical insulation. With Class II power supplies, there are two layers of insulation, and they have a two-wire power cord.
For more details on Class 2 and Class II, read our blog “Is There a Difference Between Class 2 and Class II Power Supplies?”