Compliance to EN55022(CISPR22), GB9254 CLASS B, EN55014 EN 61000-3-2,-3
EMC Immunity
Compliance to EN61000-4-2,3,4,5,6,8,11, EN61000-6-2(EN50082-2), heavy industry level, criteria A
OTHERS
Dimension
99*82*30mm (L*W*H)
Weight
0.23Kg
Packing
60pcs/carton/14.8kg/0.88CUFT
NOTE
1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12” twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
3. Tolerance: includes set up tolerance, line regulation and load regulation.
4. Line regulation is measured from low line to high line at rated load.
5. Load regulation is measured from 0% to 100% rated load.
6. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives.
7. Length of set up time is measured at cold first start. Turning ON/OFF the power supply very quickly may lead to increase of the set up time.
Product Description
LRS-35W
The LRS-35 series is a 35W single-output enclosed switching power supply that accepts a full range of 85V to 264V AC input. The series offers six output voltage options: 5V, 12V, 15V, 24V, 36V, and 48V. With an ultra-thin design measuring only 30mm in thickness and a metal mesh case, it achieves efficient heat dissipation through free air convection without the need for a fan. The operating temperature range covers -30℃ to +70℃. No-load power consumption is below 0.2W, meeting international energy efficiency standards. This series has obtained multiple safety certifications including UL, TUV, and CCC, making it suitable for power supply needs in various industrial and household equipment.
Product Features
Full-range AC input:
Supports 85~264VAC full-range input, also compatible with 120~373VDC input. Global use without switching.
Ultra-thin body:
Only 30mm thick (1U height), compact dimensions of 99×82×30mm, saving installation space.
Multiple protections:
Short circuit protection, overload protection, and over-voltage protection. Automatically recovers after fault removal or recovers upon re-power-on.
Wide temperature operation:
Stable operation from -30℃ to +70℃. Derating curve must be referenced for high-temperature use.
Metal mesh cooling:
Metal mesh case design enhances heat dissipation. Natural convection cooling, no fan required, suitable for dust-free or silent environments.
High efficiency & energy saving:
Full-load efficiency up to 82%~89% (depending on model). No-load power consumption less than 0.2W, meeting international energy requirements.
LED operation indicator:
LED lights up when power is on, providing clear power status.
Strong vibration resistance:
Withstands 5G vibration test, suitable for industrial environments with significant vibration.
100% burn-in test:
100% full-load burn-in test before shipment, ensuring long-term stability and reliability.
Complete safety certifications:
Compliant with UL60950-1, TUV EN60950-1, EN60335-1, CCC GB4943 and other standards, meeting requirements for export to multiple countries.
Product Applications
Thanks to its compact size, wide-temperature operation, and complete safety certifications, the LRS-35 series is widely used in the following scenarios:
3D printers: Provides stable DC power for control boards, heated beds, and extruders.
CNC equipment: Powers mainboards and stepper motor drives for engraving machines and laser cutters.
LED lighting: Drives 12V/24V/48V lighting systems such as LED strips, advertising light boxes, and landscape lighting.
Industrial automation: Provides stable power for PLCs, sensors, relays, industrial PCs, and other equipment.
Household appliances: Compliant with EN60335-1 standard, suitable for household appliance products.
Security monitoring: Powers security equipment such as cameras, recorders, and access control systems.
Instruments and meters: Powers laboratory instruments, measurement devices, and electronic test equipment.
Communication equipment: Provides power for routers, switches, base station equipment, etc.
Applicable model reference table:
Model
Output
Typical Applications
LRS-35-5
5V / 7A / 35W
TTL logic circuits, MCU development boards
LRS-35-12
12V / 3A / 36W
3D printers, LED strips, small motors
LRS-35-24
24V / 1.5A / 36W
CNC equipment, PLCs, stepper motors
LRS-35-48
48V / 0.8A / 38.4W
Communication equipment, PoE power, large LED screens
Frequently Asked Questions
Q1: What is the difference between the LRS-35 series and a standard linear power supply? Compared to traditional linear power supplies, switching power supplies are smaller, lighter, and more efficient (up to 89%), but have slightly higher ripple and noise. The LRS-35 series is suitable for most industrial equipment with size and power consumption requirements, and its ripple specifications already meet conventional control circuit needs.
Q2: How does ripple and noise affect equipment, and how can it be reduced? Ripple and noise are inherent AC components in the output of a switching power supply. Excessive ripple may affect precision analog circuits or communication signal quality. Ripple for each LRS-35 model is controlled between 80mVp-p and 200mVp-p. It is recommended to connect a 0.1μF and 47μF capacitor in parallel at the output terminal, or install an LC filter near the load.
Q3: How to select a switching power supply? What parameters should be considered? Three core parameters should be considered: input voltage (must match local mains), output voltage (must match equipment rated voltage), and output power (recommend that total load power does not exceed 80% of the power supply's rated power). In addition, operating ambient temperature, installation space dimensions, and safety certification requirements are also important factors.
Q4: What is the EMC performance of this product? The LRS-35 series EMI radiation complies with EN55022 CLASS B (suitable for residential and light industrial environments). EMC immunity complies with EN61000-4 series standards (heavy industrial level, Class A for industrial environments). It can be directly integrated into various industrial equipment.
Q5: What should I do if the output is abnormal, flickering, or not working? Common causes and solutions:
Check if the input power cord is well connected and if the input voltage is within the 85~264VAC range.
Check if the load exceeds the rated power, which may trigger overload protection.
Check if the LED indicator is on; if not, check the input power.
If the load is short-circuited, the power supply will enter hiccup protection mode; it will automatically recover after the load is disconnected.
If everything above is normal and it still does not work, contact Leyu Electric's after-sales service.
Q6: Can multiple power supplies be connected in parallel to increase power? Direct parallel connection is not recommended. If higher power is required, it is recommended to select a higher power model from the LRS series (e.g., LRS-50, LRS-75, etc.) or use a dedicated parallel power supply solution with current sharing function.
Q7: What do load regulation and voltage accuracy mean? Load regulation refers to the percentage change in output voltage when the load changes from 0% to 100%. The LRS-35 series is controlled within ±0.5% to ±1.0%, indicating very stable output. Voltage accuracy refers to the deviation of the output voltage from the nominal value at the factory. Each model is controlled within ±1.0% to ±2.0%.
Leyu , based in Wenzhou Leqing, enjoys a developed economy and convenient air, water, rail, and road transport. For 14 years, we have specialized in designing and producing switching power supplies and off-grid solar inverters, with CE, ROHS, CCC, IP67, and ISO9001 certifications. Our modern production and testing equipment ensure reliable performance—our 0.3‰ defect rate far exceeds the national 3% standard.
We offer OEM/ODM services (design, prototyping, production, testing, delivery) backed by senior engineers and strong R&D partnerships. Leyu products are exported to over 50 countries across Europe, the Americas, Southeast Asia, South America, and Africa. Our young, energetic foreign trade team (avg. 3 years’ experience) and our commitment to sincere, attentive service have built a trusted brand. As a high-tech enterprise integrating R&D, production, sales, and technical support, Leyu strives to become a national-class electrical company.
Company History
2021
Late 2020
Early 2020
2018
2015
2013
2009
2007
Taking Another Step Forward
The company obtained multiple intellectual property rights (patents/trademarks, etc.) and established a new company, continuously expanding its business landscape and moving toward a higher stage of development.
A New Era of Operations
An International Operations Department was formed by seven people, covering multiple platforms such as Alibaba International Station, AliExpress, Made in China, Foreign Trade Express, Google, Taobao, and Tmall. The establishment of the Operations Department marked the beginning of a new digital, multi channel era for "Leyu".
Moving to New Premises
The Foreign Trade Department moved entirely out of the factory into a brand new office building, neighboring Yueqing Ali and Times Square, upgrading both the working environment and brand image.
Shenzhen Presence
Foreign trade business expanded to Shenzhen with the establishment of a branch office, getting closer to cutting-edge markets and resources.
Factory Upgrade
The factory underwent comprehensive renovation and relocation, improving production capacity and environmental standards.
Independent Department & Market Expansion
The Foreign Trade Department was formally established, extending the sales network from Southeast Asia to Europe and accelerating internationalization.
Stepping into Foreign Trade
The company shifted its focus to foreign trade, successfully obtained foreign trade qualification certification, and officially started its overseas market journey.
Renaming and New Beginning
To expand capital scale and explore broader markets, the original "Yueqing Leyu Electric Co., Ltd." was officially renamed "Zhejiang Leyu Electric Co., Ltd.", laying the foundation for the company's upgrading and development.
Service
Leyu always puts customers at the center, integrates sincere service into every step, and with solid technology, reliable quality, efficient response, and worry-free transportation, becomes your trustworthy long-term partner.
Quality Assurance
Leyu strictly implements quality control that is 100 times better than the national standard (0.3‰ failure rate). All products are certified with CE, ROHS, CCC, IP67, etc., and undergo 100% full-load burn-in testing.
After Sales Service
Leyu has established a rapid response mechanism, patiently listens to customer feedback, and promptly resolves any issues during use, so customers have no worries.
Technical Support
Leyu provides full-process technical support from product design, drawing, and R&D to testing, ensuring that customized needs are professionally fulfilled.
Transportation Service
Leyu cooperates with multiple reliable logistics partners to provide efficient and safe domestic and international shipping solutions, ensuring products reach customers on time and in perfect condition.
Features: High efficiency, high reliability AC input range selected by switch 100% full load burn-in test Protections: Short circuit/ Over load/ Over voltage Fixed switching frequency at 25 KHz 2 years warranty
Features: Universal AC input/ full range Withstand 300VAC surge input for 5 seconds Protections: Short circuit / Overload / Over voltage Cooling by free air convection LED indicator for power on 100% full load burn-in test High operating temperature up to 70℃ High efficiency, long life and high reliability 2 years warranty
Features: Universal AC input/ full range Protections:Short circuit/ Over load/ Over voltage/ Over temperature Cooling by free air convection Can be installed on DIN rail TS-35/7.5 or 15 LED indicator for power on 100% full load burn-in test Fixed switching frequency at 67KHz 2 year warranty
Features： • Universal AC input / Full range EMC standards: •EN55022 class B • Economical and slim design • Protections: Short circuit / Overload / Over voltage / Over temperature • Cooling by free air convection • Can be installed on DIN rail TS-35 / 7.5 or 15 • EN61000-6-2(EN50082-2) industrial immunity level • 100% full load burn-in test • 2 years warranty
Professional 18-year China manufacturer of switching power supplies and off-grid solar inverters. CE, ROHS, ISO9001 certified, low defect rate, supports OEM/ODM customization, fast global delivery for industrial, LED, medical and solar power projects.
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TOP SELLING PRODUCTS
The laser cutting speed is fast, the incision is smooth and flat, and there is generally no need for subsequent processing.
Leyu Electric actively participates in numerous professional electrical and new energy exhibitions both domestically and internationally, continuously showcasing core products such as switching power supplies and off-grid solar inverters to global customers. At the booth, the company attracts many visitors with its modern craftsmanship, authoritative certifications (CE, ROHS, CCC, IP67), and quality standards that exceed national requirements.
Through live demonstrations and in-depth discussions, Leyu not only conveys its innovative design and customized OEM/ODM service capabilities but also strengthens its connections with markets in over 50 countries, including Europe, the Americas, Southeast Asia, South America, and Africa. Each exhibition serves as a powerful testament to the brand's strength, technical expertise, and commitment to sincere service, further consolidating Leyu's reputation as a responsible industry benchmark.
Certificates
We put customers first — listening to your needs, providing premium products, and offering outstanding service to fully meet your expectations.
ROHS-HLG
CE-LRS
GTS
CE-Adapter
CE
FAQ
How many voltage you can supply?
5V,9V,12V,13.8V,15V,18V,24V,36V,48V,50V,60V,110V(Depend on items).
We have the best professional and experienced engineer and strict QA and QC system.Repair rate under 0.1%-0.2%.
What's your delivery time?
Sample or small quantity order delivery in3-5 working days, large quantity order normally ship in 10-20working days.
How to request a sample? Can the sample be engraved with a logo?
Leyu supports sample orders with MOQ as low as 1 piece and accepts custom logo on samples for OEM orders (minimum quantity and cost negotiable with our sales team). Bulk orders support full OEM/ODM customization including case color, label design, and packaging.
Welcome To Contact Us
If you have any questions or needs about our products or services, please feel free to contact us at any time. We look forward to working with you and providing you with the best packaging solutions.
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