1. Introduction
This manual provides detailed instructions for the safe and efficient installation, operation, and maintenance of the EverSale Mean Well HLG-100H-48A 100W LED Power Supply. This unit is designed for various LED lighting applications, offering both constant current and constant voltage modes, and is suitable for both indoor and outdoor environments.
2. Important Safety Instructions
Please read and understand all safety instructions before installing or operating the HLG-100H-48A power supply. Failure to follow these instructions may result in electric shock, fire, or other hazards.
- Installation should be performed by a qualified electrician in accordance with all national and local electrical codes.
- Disconnect all power to the unit before installation, maintenance, or any wiring changes.
- Ensure proper grounding of the unit to prevent electric shock.
- Do not operate the unit in environments exceeding its specified temperature range or humidity levels.
- Avoid exposing the unit to direct water spray or immersion unless specifically designed for such conditions (IP67 rated for this model).
- Do not open the casing of the power supply; there are no user-serviceable parts inside.
- Ensure adequate ventilation around the unit for proper heat dissipation.
3. Product Overview and Features
The HLG-100H-48A is a high-performance 100-watt Class I LED power supply from Mean Well, known for its robust design and reliability. It features an aluminum-encased design, making it suitable for demanding indoor and outdoor applications.
Key Features:
- 100 Watt Class I LED Power Supply
- Universal AC Input: 90 ~ 305Vac (Full range)
- Output Voltage: 48VDC
- Constant Current Region: 2A @ 24-48V
- Adjustable Voltage & Current Output with on-board potentiometers (A-type and Blank type)
- Built-in active Power Factor Correction (PFC) function
- High efficiency up to 93%
- Protections: Short circuit, Over current, Over voltage, Over temperature
- Cooling by free air convection
- OCP point adjustable through output cable or internal potentiometer
- IP67 rated for indoor or outdoor installations, suitable for dry/wet/damp locations
- 3-in-1 dimming function (1~10Vdc, PWM signal or resistance) for B-type models
- Compliance with worldwide safety regulations for lighting
- 5-year warranty

Figure 1: A front-angle view of the EverSale Mean Well HLG-100H-48A 100W LED Power Supply, showcasing its aluminum casing, input/output cables, and product labeling with model number and specifications.
4. Installation and Wiring
Proper installation is crucial for the safe and optimal performance of the HLG-100H-48A. Ensure all connections are secure and comply with local electrical codes.
4.1 Mounting
The HLG-100H-48A is designed for various mounting applications, including rack mount. Ensure the mounting location allows for adequate free air convection cooling. Avoid enclosing the unit in a sealed space without proper ventilation.
4.2 Electrical Connections
Refer to the diagrams below for correct input (AC) and output (DC) wiring. Always ensure power is disconnected before making any connections.
Input Wiring:
- FG (Green/Yellow): Ground connection
- AC/L (Brown): Live AC input
- AC/N (Blue): Neutral AC input
Output Wiring:
- +V (Red): Positive DC output to LED fixture
- -V (Black): Negative DC output to LED fixture

Figure 2: Technical drawing showing the mechanical dimensions of the HLG-100H power supply, along with wiring diagrams for the Blank and A-Type models, indicating input/output connections and the location of voltage and current adjustment potentiometers.

Figure 3: Technical drawing for the HLG-100H D-Type model, including its dimensions. This image also features a block diagram of the power supply's internal components, a derating curve showing load versus ambient temperature, and static characteristics illustrating load versus input voltage.
4.3 Output Adjustment (A-type and Blank type)
For HLG-100H-48A and Blank type models, the output voltage (Vo ADJ.) and constant current (Io ADJ.) can be adjusted via internal potentiometers. These are typically accessed by removing a rubber stopper on the casing. Exercise caution when making adjustments while the unit is powered.
4.4 Waterproof Connection
For installations in wet, damp, or outdoor environments, it is essential to use appropriate waterproof connectors and cable joiners to maintain the IP67 rating of the power supply. Refer to the diagram below for recommended connection methods.

Figure 4: Diagrams illustrating waterproof connection methods for the HLG-100H, including M12 and M15 pin configurations, cable joiner specifications (CJ04-1, CJ04-2), and an optional junction box for secure outdoor installations.
5. Operating Instructions
The HLG-100H-48A is designed for straightforward operation once properly installed.
5.1 Constant Voltage (CV) and Constant Current (CC) Modes
The power supply operates in both constant voltage and constant current modes, automatically switching between them depending on the load characteristics of the connected LED fixture. The typical LED power supply I-V curve illustrates these operating regions.

Figure 5: Graphs illustrating the power factor characteristic in constant current mode, efficiency versus load at different input voltages (115Vac, 230Vac, 277Vac), and a typical LED power supply I-V curve showing constant voltage and constant current regions.
5.2 Dimming Operation (B-type only)
For HLG-100H-48B models, a built-in 3-in-1 dimming function is available, allowing for flexible control of LED brightness. This function supports:
- 1-10Vdc Dimming: Connect a 1-10Vdc signal to the DIM+ and DIM- terminals.
- PWM Signal Dimming: Connect a PWM signal (frequency 100Hz-3KHz) to the DIM+ and DIM- terminals.
- Resistance Dimming: Connect a variable resistor between DIM+ and DIM- terminals.
Refer to the diagram below for specific wiring and resistance values for output current adjustment.

Figure 6: Diagram detailing the dimming functionality for the HLG-100H B-Type model, including wiring for 1-10Vdc, PWM signal, and resistance dimming, along with a table of resistance values for output current adjustment.
6. Maintenance and Care
The HLG-100H-48A is designed for reliable operation with minimal maintenance. To ensure its longevity and optimal performance, consider the following:
- Cleaning: Periodically clean the exterior of the unit to prevent dust and debris buildup, which can hinder heat dissipation. Use a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Inspection: Regularly inspect all wiring connections for tightness and signs of wear or damage. Ensure cables are not pinched or stressed.
- Ventilation: Verify that the ventilation openings are clear and unobstructed to allow for proper airflow and cooling.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges.
7. Troubleshooting Guide
If the HLG-100H-48A is not functioning as expected, consult the following troubleshooting steps before contacting support:
- No Output Power:
- Check if the AC input power is connected and active.
- Verify all input and output wiring connections are correct and secure.
- Check for tripped circuit breakers or blown fuses in the input circuit.
- Incorrect Output Voltage/Current:
- Ensure the load (LED fixture) is compatible with the power supply's specifications.
- If applicable (A-type/Blank type), check the settings of the Vo ADJ. and Io ADJ. potentiometers.
- For B-type models, verify the dimming signal or resistance is correctly applied and within the specified range.
- Flickering or Unstable Output:
- Check for loose connections or damaged wiring.
- Ensure the load is stable and not drawing excessive current.
- Verify the input AC voltage is stable and within the specified range.
- Overheating:
- Ensure adequate ventilation and airflow around the unit.
- Verify the ambient temperature is within the operating limits.
- Check if the load is exceeding the power supply's maximum output.
If the issue persists after performing these checks, please contact customer support.
8. Technical Specifications
The following table provides detailed technical specifications for the HLG-100H series LED power supplies, including electrical characteristics, protection features, and environmental ratings.

Figure 7: A detailed table outlining the electrical, environmental, and safety specifications for the HLG-100H series LED power supplies, including input/output characteristics, protection features, and compliance standards.
Key Specifications for HLG-100H-48A:
- Input Voltage: 90 ~ 305Vac
- Output Voltage: 48VDC
- Rated Current: 2.1A
- Rated Power: 100.8W
- Efficiency: Up to 93%
- Dimensions: 8.66 x 2.68 x 1.53 inches (220 x 68 x 38.8 mm)
- Weight: 2.47 Pounds (1.12 kg)
- Operating Temperature: -40°C to +70°C (refer to derating curve)
- Protection: Short Circuit, Overload, Over Voltage, Over Temperature
- Safety Standards: UL, cUL, TUV, CB, CE, EN, EAC, CCC
- IP Rating: IP67
9. Warranty and Support
9.1 Warranty Information
The EverSale Mean Well HLG-100H-48A LED Power Supply comes with a 5-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by improper installation, misuse, unauthorized modifications, or natural disasters.
9.2 Customer Support
For technical assistance, troubleshooting, or to initiate a warranty claim, please contact EverSale customer support through their official website or the retailer from whom the product was purchased. Provide your product model number (HLG-100H-48A) and a detailed description of the issue to expedite service.





