MEAN WELL LRS-350-12 High Power Switching Power Supply 348W 12V 29A

The MEAN WELL LRS-350-12 stands as a robust 350W high-power switching power supply, engineered for demanding industrial applications requiring a stable 12V DC output at a substantial 29A current. This unit distinguishes itself through its high reliability, compact design, and adherence to stringent safety certifications, making it an ideal choice for powering a wide array of electronic equipment. Key advantages include its excellent efficiency, low ripple and noise, and comprehensive protection features.

Product Specifications

| Parameter              | Value                                      |

| :--------------------- | :----------------------------------------- |

| Output Voltage         | 12V DC                                     |

| Rated Current          | 29A                                        |

| Rated Power            | 348W                                       |

| Input Voltage Range    | 90-264VAC (47-63Hz), 127-370VDC            |

| Efficiency             | 88%                                        |

| Operating Temperature  | -25°C to +70°C                             |

| Dimensions (L x W x H) | 215mm x 115mm x 30mm                       |

| Certifications         | UL62368-1, TUV BSMI, CB, CE                 |

| Protection Features    | Short circuit, Overload, Over voltage, Over temperature |

Core Features & Market Positioning

The MEAN WELL LRS-350-12 is positioned as a cost-effective yet high-performance power solution for industrial automation, LED lighting, and communication systems. Its design prioritizes efficiency, achieving 88% typical efficiency, which translates to reduced energy consumption and heat dissipation. This focus on efficiency, coupled with a wide operating temperature range from -25°C to +70°C, ensures reliable operation in challenging environments. The power supply's compliance with international safety standards like UL62368-1 and TUV BSMI further solidifies its market appeal, offering users peace of mind regarding safety and regulatory adherence. The low profile (30mm height) allows for integration into space-constrained systems, a critical advantage in many industrial enclosures.

Key Application Scenarios

This 12V, 29A power supply is exceptionally well-suited for applications demanding high current at a regulated voltage. Common industrial scenarios include powering LED displays and signage, automated machinery control systems, security and surveillance equipment, and various types of communication infrastructure. Its ability to provide a stable 12V output is crucial for sensitive electronics that require consistent power delivery to function optimally. The LRS-350-12 is also a prime candidate for battery charging systems and general industrial power distribution where a reliable and high-amperage 12V source is needed.

Practical System Integration Guidance

Integrating the MEAN WELL LRS-350-12 into an industrial system is straightforward due to its standard input and output terminals. The unit accepts a universal AC input voltage range of 90-264VAC, simplifying global deployment. For wiring, it is essential to use appropriate gauge wires rated for the maximum current draw (29A) to prevent overheating and voltage drop. The power supply features screw terminals for both AC input (L, N, FG) and DC output (+V, -V), facilitating secure connections. Ensure proper grounding (FG terminal) for safety and to minimize electrical noise. Ventilation is critical; maintain adequate clearance around the unit, especially when operating at full load, to prevent thermal shutdown.

Operation and Risk Mitigation

Safe operation of the MEAN WELL LRS-350-12 requires adherence to electrical safety standards and proper handling. Always disconnect power before making or breaking connections. The unit incorporates over-voltage protection, overload protection, and over-temperature protection to safeguard both the power supply and the connected load. In the event of an overload, the power supply will typically shut down or limit output current. Upon removal of the fault condition, it will usually auto-recover. If the unit overheats, it will shut down; allow it to cool before resuming operation. Avoid operating the unit in environments with excessive dust, humidity, or corrosive substances, as these can degrade performance and compromise safety.

Scalability & Long-Term Value

The LRS-350-12 offers inherent scalability through parallel or series configurations, though specific implementation details and derating should be consulted in the datasheet for optimal performance and longevity. Its robust construction and MEAN WELL's reputation for reliability contribute to its long-term value, minimizing downtime and replacement costs. For systems requiring advanced monitoring or integration into an Industrial Internet of Things (IIoT) framework, the LRS-350-12 can serve as a foundational power component. While this specific model doesn't have built-in communication interfaces, it provides a stable power base for other intelligent devices within a networked industrial setup.

Frequently Asked Questions

What is the maximum input voltage for the MEAN WELL LRS-350-12?

The power supply accepts a wide AC input voltage range. This covers standard global mains voltages. It can also handle DC input for specific applications.

It supports input voltages from 90 to 264VAC. This ensures versatility in different power grids worldwide. The DC input range is 127 to 370VDC.

This broad input range provides flexibility for diverse industrial environments. It also helps in regions with unstable power sources.

How efficient is the MEAN WELL LRS-350-12?

This power supply boasts a high energy efficiency rating. It is designed to minimize power loss during operation. This leads to cost savings on electricity bills.

The LRS-350-12 achieves up to 88% efficiency. This is a significant figure for a 350W unit. High efficiency also means less heat generation.

Reduced heat output allows for more compact enclosure designs. It also extends the lifespan of the power supply itself.

What safety certifications does the LRS-350-12 have?

This power supply meets several crucial international safety standards. These certifications are vital for industrial equipment. They ensure user and system protection.

Key certifications include UL62368-1, TUV BSMI, CB, and CE. These cover electrical safety and electromagnetic compatibility.

Having these approvals simplifies system integration into products for global markets. It confirms the unit's reliability and safety compliance.

What are the dimensions of the MEAN WELL LRS-350-12?

The physical size of the power supply is important for integration. This model features a slim and compact form factor. It is designed for space-constrained applications.

Its dimensions are 215mm in length, 115mm in width, and 30mm in height. The low profile is a key design advantage.

These dimensions allow it to fit easily into 1U rack-mount chassis or narrow enclosures. This makes it a versatile choice for many system designs.

Can the LRS-350-12 be used in extreme temperatures?

Yes, this power supply is built for robust environmental conditions. It can operate reliably across a broad temperature spectrum. This makes it suitable for harsh industrial settings.

The specified operating temperature range is -25°C to +70°C. This wide range ensures performance in both cold and hot environments.

However, ensure adequate ventilation, especially at higher temperatures or full load, to maintain optimal performance and longevity.

What is the rated output power and current of this unit?

The LRS-350-12 is rated for a significant power output. This allows it to drive high-demand equipment. It provides a stable and substantial current.

It delivers a continuous 348W of power. The rated output current is 29A at 12V DC. This is suitable for many industrial loads.

This high current capacity makes it ideal for applications needing a strong 12V source, like motor drivers or large LED arrays.

What protection features are built into the LRS-350-12?

Safety and reliability are paramount in its design. The unit includes multiple built-in protection mechanisms. These safeguard the power supply and connected devices.

It features protection against short circuits, overloads, and over-voltages. An over-temperature protection feature is also included.

These protections ensure safe operation and prevent damage during fault conditions, allowing for quick recovery.

Is the MEAN WELL LRS-350-12 suitable for LED lighting applications?

Absolutely. The stable 12V DC output and high current capability make it an excellent choice. It can efficiently power large LED installations.

Its low ripple and noise characteristics are beneficial. This ensures consistent light output and prevents flickering in LED displays.

The wide operating temperature range also supports outdoor or unconditioned environments where LED lighting is common.

Does this power supply require forced cooling?

The LRS-350-12 is designed for convection cooling primarily. However, forced cooling can enhance performance and lifespan. It is recommended at higher loads or temperatures.

Adequate airflow is crucial for effective heat dissipation. Free air movement around the unit is essential for its operation.

For continuous operation at maximum load in enclosed spaces, adding a fan or ensuring robust ventilation is advisable.

What is the warranty period for the MEAN WELL LRS-350-12?

MEAN WELL typically offers a substantial warranty on its industrial power supplies. This reflects their commitment to quality and durability. Specific terms may vary by region or distributor.

Most MEAN WELL LRS series power supplies come with a 3-year limited warranty. This covers defects in materials and workmanship.

Always check the product documentation or with your supplier for the exact warranty details applicable to your purchase.