| Availability: | |
|---|---|
| Quantity: | |
SDJ-48S13R8
SMUN
The 48V to 13.8V DC DC Step Down Converter is an industrial-grade non-isolated switch-mode power solution, engineered to convert 36V/48V nominal DC input (featuring an ultra-wide 30-60VDC range) into a precision-regulated 13.8VDC output. Designed specifically for negative ground systems, this series offers output current ratings from 5A to 100A, delivering 69W to 1380W of rated power. It is built to address the strict power conversion requirements of telecommunications infrastructure, industrial automation, and renewable energy storage. Achieving a peak efficiency of up to 97%, this 30-60VDC to 13.8VDC Non-isolated DC Converter minimizes thermal dissipation and energy loss, ensuring consistent performance during long-term continuous operation. It serves as a dependable choice for mission-critical power infrastructure, helping to reduce maintenance frequency and operational costs.

Model No. | Input voltage | Output voltage | Output current | Rated power | Efficiency | Size |
SDJ-48S13R805 | 30-60VDC | 13.8VDC | 5 Amps | 69W | 92.20% | 64*57*22mm |
SDJ-48S13R810Z | 30-60VDC | 13.8VDC | 10 Amps | 138W | 93.70% | 64*57*22mm |
SDJ-48S13R815 | 30-60VDC | 13.8VDC | 15 Amps | 207W | 95.80% | 74*74*32mm |
SDJ-48S13R820 | 30-60VDC | 13.8VDC | 20 Amps | 276W | 95% | 74*74*32mm |
SDJ-48S13R830 | 30-60VDC | 13.8VDC | 30 Amps | 414W | 95.30% | 100*80*39mm |
SDJ-48S13R840 | 30-60VDC | 13.8VDC | 40 Amps | 552W | 96.30% | 100*80*39mm |
SDJ-48S13R850M | 30-60VDC | 13.8VDC | 50 Amps | 690W | 97% | 100*80*36mm |
SDJ-48S13R860M | 30-60VDC | 13.8VDC | 60 Amps | 828W | 96.50% | 100*80*36mm |
SDJ-48S13R880 | 30-60VDC | 13.8VDC | 80 Amps | 1104W | 96% | 140*120*42.5mm |
SDJ-48S13R8100 | 30-60VDC | 13.8VDC | 100 Amps | 1380W | 97% | 140*120*42.5mm |
The table above outlines the standard specifications. Custom configurations are available upon request based on specific project requirements.
Achieving up to 97% peak efficiency, this 48V 13.8V Step Down DC Power Converter significantly reduces energy waste and thermal buildup within 48V power infrastructures. This high conversion rate translates to lower long-term operating costs, extended equipment lifespan, and reduced cooling requirements, delivering measurable value for large-scale deployment projects.
Featuring an IP68 waterproof and dustproof rating, the converter is fully shielded against moisture, dust ingress, vibration, and severe weather conditions. It maintains stable voltage output in both indoor telecom cabinets and exposed outdoor remote installations, helping to prevent unplanned downtime and minimize replacement frequency in demanding environments.
Integrated safety mechanisms—including short circuit, overload, over-temperature, and over-voltage protections—safeguard both the converter and the connected load. Each unit undergoes 100% full-load burn-in testing under extreme temperature fluctuations, ensuring continuous and stable power delivery for critical telecommunications and industrial control applications.
Available in 10 standard current ratings from 5A to 100A, the series provides scalable options for various load requirements. We also support customized voltage, current, housing, and connector configurations for volume orders. This flexibility allows system integrators and procurement teams to match the power solution precisely to their unique project specifications without prohibitive upfront engineering costs.
This IP68 48V 13.8V DC Converter for Telecom is engineered for sectors that demand highly reliable power conversion. Typical applications include telecommunications infrastructure (such as 5G base stations, remote communication sites, and backup power arrays), renewable energy setups (off-grid solar installations, wind turbine auxiliary power, and energy storage systems), industrial automation (heavy equipment control and factory automation networks), as well as transportation and marine environments (railway auxiliary power and shipboard communication systems).
All 48V to 13.8V DC DC Converters are manufactured to comply with strict CE and RoHS standards. The internal circuitry utilizes industrial-grade NCC and NICHICON capacitors to maintain stable performance amidst fluctuating input voltages and extreme temperature variations. Every unit is subjected to rigorous 100% full-load burn-in testing prior to dispatch. We provide a 1-3 year warranty for volume orders, offering procurement teams assurance in product reliability and long-term operational stability.
Packaging: Units are secured in anti-static, moisture-proof, and shock-resistant industrial packaging. Custom branded packaging is available for volume distribution orders.
Shipping: We support global logistics via sea freight, air cargo, and international express couriers. Flexible terms including DDP, DDU, and EXW are available to accommodate specific import and supply chain requirements.
Order Terms: We offer flexible minimum order quantities (MOQs) and provide sample units for initial technical evaluation. Standard volume orders typically require a lead time of 10-15 working days, with comprehensive OEM/ODM support for specialized project demands.
Yes. The unit is designed with an ultra-wide 30-60VDC input range, making it fully compatible with both 36V and 48V nominal power systems commonly utilized in telecom and industrial applications.
The converter is equipped with comprehensive short circuit, overload, over-temperature, and over-voltage protection circuits. These features ensure continuous power delivery and protect sensitive downstream equipment even under abnormal operating conditions, which is vital for maintaining telecom infrastructure stability.
Whether sourcing units for telecom infrastructure deployment, industrial system integration, or volume distribution, we provide tailored power solutions to meet your technical specifications. Contact our engineering and sales team today to discuss your project requirements, request sample testing support, and receive a customized quotation for the 48V to 13.8V DC DC Step Down Converter.