| Quantity: | |
|---|---|
SPECIFICATION | |||||||||
OUTPUT | |||||||||
Model | SD-50A-5 | SD-50B-5 | SD-50C-5 | SD-50A-12 | SD-50B-12 | SD-50C-12 | SD-50A-24 | SD-50B-24 | SD-50C-24 |
DC Voltage | 5V | 12V | 24V | ||||||
Rated Current | 10A | 4.2A | 2.1A | ||||||
Current Range | 0~10A | 0~4.2A | 0~2.1A | ||||||
Rated Power | 50W | 50.4W | 50.4W | ||||||
Ripple & Noise | 100mVp-p | 120mVp-p | 150mVp-p | ||||||
Voltage Adj. Range | 4.5~5.5VDC | 11~16VDC | 23~30VDC | ||||||
Voltage Tolerance | ±2.0% | ±1.0% | ±1.0% | ||||||
Line Regulation | ±0.5% | ±0.3% | ±0.2% | ||||||
Load Regulation | ±0.5% | ±0.3% | ±0.2% | ||||||
Setup, Rise, Hold Up Time | 2.5s,50ms,------at full load | ||||||||
Voltage Range | A:9.2~18VDC B:19~36VDC C:36~72VDC | ||||||||
Efficiency | 70% | 73% | 76% | 72% | 75% | 78% | 74% | 80% | 83% |
DC Current | A:7A/12V | B:3A/24V | C:1.5A/48V | ||||||
Over Load | 105~150% rated output power | ||||||||
Protection type: Hiccup mode,recovers automatically after fault condition is removed | |||||||||
Over Voltage | 5.75~6.75V/10%load | 16.8~20V/10%load | 31.5~37.5V/10%load | ||||||
Protection type: Hiccup mode,recovers automatically after fault condition is removed | |||||||||
Working Temp. | -10~+60℃ (Refer to "Derating Curve") | ||||||||
Working Humidity | 20~90% RH non-condensing | ||||||||
Storage temp., Humidity | -20~+85℃ ,10~95%RH | ||||||||
Temp. Coefficient | ±0.03%/℃ (0~50℃) | ||||||||
Vibration | 10~500Hz,2G10min./1cycle,60min.each along X, Y,Z axes | ||||||||
Safety Standards | Design refer to LVD | ||||||||
Withstand Voltage | I/P-O/P:1.5KVAC I/P-FG:2.0KVAC O/P-FG:0.5KVAC | ||||||||
Isolation Resistance | I/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC /25℃ /70%RH | ||||||||
EMC Emission | Compliance to EN55022(CISPR22)Class B | ||||||||
EMC Immunity | Compliance to EN61000-4-2,3,4,6,8, EN55024, heavy industry level, criteria A | ||||||||
Dimension | 159*97*38mm(L*W*H) | ||||||||
Weight | 0.48Kg | ||||||||
Packing | 24pcs/12.7Kg/0.75CUFT | ||||||||
NOTE | |||||||||
1. All parameters NOT specially mentioned are measured at 12,24,48VDC 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. 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. | |||||||||
Leyu Electric (Yueqing Leyu Electric Automation Co., Ltd.) presents the SD-50B-24, a 50W single-output DC-DC converter. It accepts an input voltage range of 19–36VDC (nominal 24V) and delivers 24VDC output with a rated current of 2.1A. The converter comes in a metal case measuring 159×97×38mm, with efficiency up to 80%. It is designed for applications that require stable, isolated power from a 24V battery or vehicle power source, accommodating voltage swings from 19V to 36V.
2:1 wide input range
Input voltage 19–36VDC, compatible with voltage fluctuations of a nominal 24V battery system (e.g., lead‑acid battery float charge can reach 28.8V).
1500VAC I/O isolation
Isolation voltage of 1500VAC between input and output, suitable for industrial equipment or battery systems that require ground isolation.
Built-in EMI filter
Typical output ripple and noise of 120mVp‑p, meeting the requirements of general industrial electronics.
Hiccup mode protection
Short‑circuit and overload protection (105%–150% of rated power); automatic recovery after fault removal.
100% full‑load burn‑in
Every unit is full‑load tested before shipment to eliminate early failures.
Fixed switching frequency
83 kHz, reducing interference to sensitive circuits.
2‑year warranty.
Wide voltage adaptability:
Input range 19–36V covers the discharge cut‑off voltage (approx. 20V) to maximum charge voltage (approx. 29V) of a 24V battery system – no additional voltage regulation needed.
Isolation reduces common‑mode interference:
1500VAC isolation effectively blocks ground loop noise from the battery side, ideal for precision measurement or communication equipment.
No external filter required
Built‑in EMI filtering simplifies end‑device design.
Moderate efficiency
80% efficiency is reasonable for a 50W isolated DC‑DC converter; heat generation is manageable with natural convection cooling.
Full certifications
Complies with LVD, EN55022 Class B and heavy industrial immunity standards (EN61000‑6‑2), facilitating export.
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.
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.
Leyu provides full-process technical support from product design, drawing, and R&D to testing, ensuring that customized needs are professionally fulfilled.
Leyu has established a rapid response mechanism, patiently listens to customer feedback, and promptly resolves any issues during use, so customers have no worries.
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.
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.
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Established In
Technical Staff
Have an excellent after-sales service team to ensure that the first time to solve customer after-sales problems.
More than 10 precision production line, easy to realize large quantities of goods, to provide you with the best price.
We have an excellent technical team, which can be designed according to customers requirements.
Founding Year
Years of Innovation
Global Reach
Employees Worldwide
Choosing Leyu means choosing quality control that is 100 times stricter than the national standard (0.3‰ vs. 3%), globally recognized certifications (CE/ROHS/CCC/IP67), and switching power supplies & off-grid inverters verified in over 50 countries — backed by excellent craftsmanship and sincere service, safeguarding every power connection you make.
We put customers first — listening to your needs, providing premium products, and offering outstanding service to fully meet your expectations.
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