company blog about Mingjiada Electronics Stocks Delta’s Isolated DC-DC Power Supply Modules, Enabling High-Density Power Supply for Servers

As computing density in data centers continues to rise, upgrading server rack bus voltages from the traditional 12V to 48V has become an industry trend. In a 48V two-level power supply architecture, isolated DC-DC power modules play a critical role in efficiently converting the 48V bus to a 12V intermediate bus; their conversion efficiency and power density directly impact the performance of the entire system’s power supply chain. Shenzhen Mingjiada Electronics Co., Ltd. currently maintains a long-term stock of various Delta Electronics isolated DC-DC power modules, providing server system integrators and equipment manufacturers with a one-stop procurement service featuring genuine, original products and fast delivery.

I. Overview of Key Models in Stock

(1) Q50SN12072RNDHQ—864W 1/4-brick Isolated LLC Resonant IBC

The Q50SN12072 is Mingjiada’s current flagship Delta isolated DC-DC power module. It features an industry-standard 1/4-brick package (58.48 × 36.94 × 11.56 mm, weighing only 71 g) and is specifically designed for 48V-to-12V two-stage power supply scenarios in high-density cloud computing and AI servers.

Input Voltage: 38–60 V DC (wide DC bus)

Output Voltage/Current: 12 V / 72 A

Maximum Output Power: 864 W

Peak Efficiency: Up to 98.3% (@54 Vin)

Topology: LLC Resonant + IBC Isolated Hybrid Topology

Monitoring Interface: Full PMBus Digital Monitoring System

Package: Industrial-standard 1/4-brick

This module employs an LLC resonant + IBC isolated hybrid topology, enabling soft-switching operation across the entire load range, which significantly reduces switching losses and electromagnetic interference. The IBC isolation architecture provides complete electrical isolation between the input and output, effectively shielding the downstream 12V load from voltage fluctuations on the 48V bus side. The module’s rear features an aluminum alloy heat sink, with thermal compound filling the gap between the PCB and the heat sink, ensuring reliable operation at high power levels and meeting the demanding conditions of 24/7, full-load operation in data centers.

(2) Q48SC12042NRAH—500W 1/4-Brick Isolated DC-DC Converter

The Q48SC12042 is designed for data communication, server, and industrial equipment applications. It features an input voltage range of 36V to 75V and delivers a stable 12V/42A output at a standard 48V input. With a rated power of 500W, it achieves a full-load efficiency of 95.0%.

Input Voltage: 36–75 V DC

Output Voltage/Current: 12 V / 42 A (adjustable from 8 V to 13.2 V)

Rated Power: 500 W

Full-Load Efficiency: 95.0%

Isolation Voltage: 1500 V

Package Dimensions: 58.4 × 36.8 × 12.4 mm (DOSA 1/4-brick)

Operating Temperature: -40°C to +85°C

This module features a built-in digital PWM controller and supports the PMBus communication protocol, enabling functions such as output voltage feedback, fault protection, output voltage fine-tuning, and on/off control. Its droop-type current sharing capability supports direct parallel operation without the need for additional OR-gate FETs, simplifying the design complexity of multi-module power supply systems. The module integrates multiple fault protection features, including input under-voltage lockout, output overcurrent protection, overvoltage protection, and over-temperature protection, making it suitable for the always-on operating environments of servers and telecommunications equipment.

II. Other Available Isolated DC-DC Series

Mingjiada also stocks the following series of Delta isolated DC-DC power modules, allowing for flexible selection based on specific power and packaging requirements:

V48S Series (1/16-brick, 36–75V input): Covering output specifications such as 5V/20A (100W), 5V/17A (85W), 12V/7.5A (90W), and 3.3V/15A (50W), these modules feature a 1500V isolation voltage and support both monotonic startup to normal and pre-biased load startup. They are used in server and data storage applications.

Q48S Series (1/4-brick, 36–75V input): Fully digital-controlled DC/DC converters offering output specifications such as 12V/25A (300W), 12V/34A (408W), and 12V/42A (504W). They feature 2250V isolation voltage and basic insulation, and support PMBus communication and remote switch control.

E48S Series (1/8-brick, 36–75V input): Covering a power range of 60–300W, with output voltages of 3.3–48V and load currents of 5–25A, this series features 1500V isolation voltage and fully digital control technology. It integrates functions such as input under-voltage lockout, output overcurrent and overvoltage protection, and over-temperature protection, making it an ideal choice for server and data storage applications.

III. Supply Service Advantages of Mingjiada Electronics

Established in 1996, Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned authorized independent distributor of electronic components, specializing in the distribution of products from over 500 well-known manufacturers. The company possesses extensive original manufacturer channel resources and inventory capabilities in the power module sector. The company operates branches in Hong Kong, Japan, Russia, and Taiwan, among other locations, and has obtained ISO 9001:2014 international quality standard certification, enabling it to provide customers with full-cycle supply support—from sample verification to bulk delivery.

For Delta’s isolated DC-DC power modules, Mingjiada Electronics offers the following core services:

Guarantee of Genuine Products: All modules are procured through official OEM channels; they are brand-new, genuine products with traceable batch information;

In-Stock Inventory Support: Key models such as the Q50SN12072 and Q48SC12042 are kept in stock long-term, supporting both small-batch sample purchases and large-volume supply;

Rapid Delivery Capability: Leveraging our Shenzhen headquarters and Hong Kong branch, we provide fast logistics and customs clearance services to customers worldwide.

To inquire about the inventory status of Delta’s isolated DC-DC power modules or to request samples, please contact the Mingjiada Electronics sales team or visit our official website at www.integrated-ic.com for online inquiries.