I. Comparison of Core Technical Parameters

　　The parameters of 300W switching power supplies from different manufacturers vary and need to be matched according to the requirements of the power tools (information compiled from technical data of multiple brands):

　　ATO ATO-S-300-15: Input range covers 90-132/180-264VAC, output voltage is 15V DC, rated current is 20A, efficiency reaches 78%, ripple noise is controlled at 150mVp-p. It has triple protection functions of short circuit, overload, and overvoltage, uses built-in DC fan cooling, and the operating temperature range is -10~+50℃.

　　Chenglian CLU-300A Series: Input range is 190-264VAC, providing multiple output voltage options of 12/24/36/48V DC, rated current corresponds to 6.3-25A. Efficiency ranges from 85% to 87%, ripple noise ≤500-600mVp-p, and protection functions include short circuit and overload (hiccup mode). It features a self-cooling design and can operate stably in environments ranging from -30°C to +60°C.

　　Jinrui open-rack power supply: Wide input range up to 90-264VAC, output voltage covering 12-48V DC, rated current adjusted according to output voltage. Efficiency can reach up to 93%, ripple noise parameters are not explicitly stated, equipped with short circuit, overload, and overvoltage protection mechanisms, and uses a 20.5CFM air-cooling solution. Operating temperature parameters are not specified.

　　II. Key Points for Power Tool Compatibility Selection

　　Voltage Matching Principle: The rated voltage of the power tool motor determines the power supply output voltage. For example, 15V is suitable for small electric drills, and 24-48V is suitable for heavy tools such as grinders. Wide input range (90-264VAC) is more suitable for use in many regions worldwide.

　　Protection and Reliability First

　　Power tools often operate in dusty/vibrating environments and must meet the following requirements:

　　Over-temperature protection (e.g., shutdown at ≥80℃)

　　High insulation resistance (≥10MΩ)

　　Vibration resistance (10-500Hz/2G)

　　Efficiency and Heat Dissipation Compatibility

　　For long-term outdoor operation, a cooling system (e.g., Chenglian CLU-300A) is preferred. For high-load scenarios, air cooling is recommended (efficiency increased to 93%) to avoid overheating shutdown.

　　Safety Certification Compatibility

　　The North American market requires UL1012 certification, Europe requires EN60950, and China requires GB4943.

　　III. Mainstream Products and Applicable Scenarios

　　ATO ATO-S-300-15: Its core advantages lie in low cost, wide protection range, and fan cooling design. It is suitable for small drills, grinders, and other light power tools, making it an economical product.

　　Ryobi RYi300BG: Supports 40V lithium battery compatibility, uses pure sine wave technology, and features one USB-A, one USB-C, and one 120V socket, along with a vehicle-mounted LED light. Suitable for portable power tools requiring battery inverters, with a suggested retail price of $99.00 and a 5-year limited warranty.

　　Chenglian CLU-300A-48: Features -30℃ low-temperature start-up capability and high-altitude adaptability, suitable for heavy-duty tools such as outdoor cutting machines and air compressors; an industrial-grade product.

　　Jinrui open-rack power supply: With 93% high efficiency, PFC function, and a 3-year warranty as its core advantages, it is suitable for stationary power tools on production lines, targeting the mid-to-high-end market. A similar Mornsun LBH300-13Bxx series also supports a wide input range of 85-305VAC, with an aluminum substrate operating temperature of -40~+100℃ and an isolation voltage of 3000VAC. IV. Key Design and Application Considerations

　　Load Margin Reserved

　　It is recommended to select a power supply with 130% of the tool's maximum power (e.g., select a 130W or higher power supply for a 100W tool) to extend its lifespan.

　　EMC Compliance Design

　　The power supply must comply with the EN55032 electromagnetic compatibility standard to avoid interference with the tool's control system. For example, the Cincon CBM300S series has a built-in EMI solution that meets the EN 55032 Class B standard.

　　Maintenance Ease

　　Air-cooled models require regular cleaning of the fan dust filter. For self-cooled models, pay attention to the installation space for heat dissipation (Chenglian models are only 240×63×30mm in size). For models with temperature-controlled fans, such as the Zhejiang Jingchuang S-300 series, also pay attention to the cold start current parameters (20A/115V, 40A/230V).

Read recommendations:

Bedroom direct charger

12V2A Wall Plug US Plug

18V European standard battery charger

1000W Desktop power wholesaler

Transformer Oil Quality Deterioration Causes