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48V 13.8V DC DC Converter Step Telecom

Features Design meeting ROHS / CE High efficiency up to 97% (@48V input) Non-isolated between input and output lnternal capacitor:NCC NICHICON (high reliability) 100% full load burn-in test Waterproof level IP68, 1-3 years warranty Short circuit,Over load, and Over temperature protections Applications: Electromotor Telecommunications, Logging Vehicles Forklifts and on.
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  • SDJ-48S13R8

  • SMUN


Product Overview


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.


48V 13.8V DC DC Converter Step Telecom


Technical Parameters


Standard Model Specifications

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.


Core Advantages for Procurement & Engineering


Optimized Efficiency for 48V Power Systems

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.

IP68-Rated Enclosure for Environmental Resilience

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.

Comprehensive Protection for Mission-Critical Power Supply

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.

Scalable Specifications for Diverse Projects

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.


Target Industries & Applications


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).


Quality Assurance & Compliance


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, Shipping & Order Terms


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.


FAQ


Can this 48V to 13.8V DC converter work with 36V nominal power systems?

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.

What protection features does this converter offer for telecom base station 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.


Get Your Custom Quotation


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.


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 No. 5, Zhengshun West Road, Xiangyang Industrial Zone, Liushi,Yueqing,Zhejiang,China,325604
+86-13868370609 
+86-0577-62657774 

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