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SDS8-40S13R8
SMUN
Our SDSJ Series boost buck DC-DC converter is engineered to deliver a highly stable, non-isolated power conversion solution for demanding industrial and automotive applications. Designed to handle an ultra-wide 8-40VDC input range and provide a precise 13.8VDC output, this series offers a versatile power rating spanning from 41.4W to 759W, alongside output current options ranging from 3A up to 55A. For procurement managers and technical engineers, ensuring consistent voltage stability is critical to system reliability. This 8-40V to 13.8V DC-DC converter guarantees exceptional energy efficiency and minimal power consumption, making it an ideal choice for continuous-duty equipment. By integrating this robust component into your supply chain, you secure a reliable power foundation that minimizes operational risks and enhances the overall performance of your industrial and mobile equipment.

Model No. | Input voltage | Output voltage | Output current | Rated power | Efficiency | Size |
SDSJ8-4013R803 | 8-40VDC | 13.8VDC | 3 Amps | 41.4W | 89.60% | 64*57*22mm |
SDSJ8-4013R805 | 8-40VDC | 13.8VDC | 5 Amps | 69W | 93.50% | 74*74*32mm |
SDSJ8-4013R810 | 8-40VDC | 13.8VDC | 10 Amps | 138W | 93.50% | 74*74*32mm |
SDSJ8-4013R820 | 8-40VDC | 13.8VDC | 20 Amps | 276W | 96.20% | 74*74*32mm |
SDSJ8-4013R825 | 8-40VDC | 13.8VDC | 25 Amps | 345W | 96.90% | 100*80*39mm |
SDSJ8-4013R830 | 8-40VDC | 13.8VDC | 30 Amps | 414W | 96.40% | 100*80*39mm |
SDSJ10-4413R840 | 10-44VDC | 13.8VDC | 40 Amps | 552W | 96.60% | 140*120*42.5mm |
SDSJ10-4413R855 | 10-44VDC | 13.8VDC | 55 Amps | 759W | 95.80% | 140*120*42.5mm |
Operating with a peak efficiency of up to 96.9% and maintaining a typical 95% efficiency at a 12V input, our automotive DC-DC power converter significantly minimizes energy loss during voltage conversion. For large-scale deployments, this high efficiency directly translates to reduced thermal stress on internal components and lower long-term operating costs. This thermal efficiency extends the service life of both the converter and the connected equipment, providing a strong competitive edge for your integrated product lines.
Industrial and outdoor applications demand uncompromising durability. Featuring an IP68 waterproof and dustproof rating, this high efficiency DC-DC boost buck converter is fully sealed to perform reliably in harsh, moisture-heavy, and vibration-prone environments. Whether deployed in heavy machinery or marine vessels, the rugged enclosure eliminates the need for frequent replacements and significantly reduces after-sales maintenance costs for your engineering projects.
System safety is paramount in power management. This converter is equipped with built-in short circuit, overload, and over-temperature protections. These integrated safeguards actively protect both the power module and your valuable connected equipment from unexpected electrical surges or thermal events. By reducing failure rates, it ensures uninterrupted, stable operation even in continuous full-load scenarios.
The 13.8V DC power converter for vehicles is a versatile component widely deployed across multiple demanding sectors. Typical applications include automotive electronics, telecommunications infrastructure, logging vehicles, electric forklifts, industrial automation systems, marine equipment, and off-grid solar power systems. It is perfectly suited for any project requiring stable, regulated voltage conversion in environments where input voltages frequently fluctuate. By standardizing on this converter, manufacturers can streamline their component sourcing for various mobile and stationary power projects.
Reliability is built into every stage of our manufacturing process. All IP68 waterproof DC-DC converter units are rigorously designed to meet CE and RoHS compliance standards. Prior to shipment, each unit undergoes 100% full-load burn-in testing to guarantee out-of-the-box performance. Internally, we utilize high-reliability NCC and NICHICON capacitors to ensure long-term electrical stability. To give our trade clients full peace of mind for bulk procurement, we back this series with a comprehensive 3-year global warranty.
We understand that secure logistics and flexible ordering are critical for your supply chain. Each converter unit is carefully packed in anti-static packaging and housed within reinforced export cartons to prevent mechanical damage during international transit. We support global shipping via sea, air, and express courier networks, offering flexible lead times tailored to your specific project schedules. Furthermore, we accept low minimum order quantities (MOQ) for initial trial orders and provide custom parameter adjustments for bulk procurement to precisely match your unique engineering requirements.
The core series supports a highly versatile 8-40VDC wide input range. For our high-power models, the input range is optimized for 10-44VDC. This broad compatibility ensures seamless integration with standard 12V, 24V, and 36V battery systems commonly found in automotive and industrial setups.
All models are engineered with standard short circuit, overload, and over-temperature protection mechanisms. Importantly, these units feature an auto-recovery function that safely restores power output once the electrical fault is removed, minimizing system downtime.
Yes, we provide extensive customization services for bulk orders. Our engineering team can facilitate custom parameter tuning, specific housing adjustments, and tailored connector modifications to perfectly align with your specific application needs.
Contact our technical sales team today to request a personalized quotation for our 8-40V to 13.8V boost buck DC-DC converter. We offer highly competitive bulk pricing structures, complimentary technical support, and accessible sample testing services to ensure you find the exact power management solution for your upcoming projects.