Murata Launches 1W DC-DC Converter with Reinforced Isolation & Ultra-Low Capacitance

Murata Manufacturing has launched the NXJ1T series, a high-performance 1W DC-DC converter designed to provide reinforced isolation for communication interfaces and analog front-end (AFE) measurement circuits. With 4.2kVDC isolation (Hi Pot Test) and compliance with UL62368 safety standards, the NXJ1T series delivers exceptional electrical isolation, noise immunity, and thermal reliability for industrial, energy, and medical applications.

As industries transition to higher voltage systems, particularly in 800V electric vehicles (EV) and supporting chargers, battery energy storage (BESS), and renewable energy infrastructure, the need for robust isolation in communication and sensing systems has become increasingly critical. Furthermore, in medical applications, where low leakage current and safety isolation are essential, reliable power solutions must also meet stringent regulatory requirements like ANSI/AAMI ES60601-1.

Murata’s NXJ1T series addresses these challenges, offering a compact (10.55mm x 13.70mm x 4.04mm), high-performance DC-DC converter engineered for safety and durability in the most demanding environments. It features an unregulated 1W 5V input to 5V/200mA output design, ideal for embedded systems. Murata's proprietary molding technology provides the NXJ1T series with high ingress protection against dust and particulates in harsh industrial environments and extreme temperatures. During development, the DC-DC converter has successfully undergone 1,000 temperature cycles between -40°C and 125°C, demonstrating its ability to withstand the highest levels of thermal stress.

Manufactured in the UK, the NXJ1T incorporates Murata’s proprietary block-coil transformer technology, providing high isolation, low leakage current, and exceptional performance. In contrast to many alternative solutions on the market, which utilize wireless power coils that exhibit low coupling factors, high switching frequencies (approximately 10 MHz), and low efficiencies of typically around 40-60%, Murata's block-coil transformer technology facilitates lower switching frequencies (500 kHz–2 MHz) and higher efficiencies of approximately 80%. The result is exceptional common mode transient immunity (CMTI) and significantly lower isolation capacitance, making the NXJ1T series an ideal choice for engineers requiring high-performance power isolation in electrically noisy environments.

Each device features UL62368 recognition including reinforced insulation to 200Vrms and basic insulation to 250Vrms, providing an added layer of protection in high-voltage environments, while the under-voltage lockout (UVLO) functionality enhances operational stability, preventing erratic behavior under fluctuating power conditions. Furthermore, in medical equipment, where low leakage current is critical for patient-connected applications, the NXJ1T’s ultra-low isolation capacitance helps minimize unwanted leakage, supporting compliance with stringent safety standards like IEC 60601-1 when used within a certified system.

With a standard industry pin out and compact surface mount device (SMD) package, the NXJ1T provides seamless system integration into applications such as CAN Bus systems in EV chargers, heavy industrial automation systems, and medical instrumentation including X-ray, laser, ultrasound, and surgical instrumentation. In these high-voltage deployments, the DC-DC converters can deliver long-term stability and safety in high-voltage applications.

“As power system voltages continue to rise across industrial, and medical sectors, engineers require robust isolation solutions that can withstand demanding environments while maintaining efficiency,” said Ann-Marie Bayliss, Product Manager at Murata. She continued, “With its advanced transformer technology, the NXJ1T series delivers class-leading isolation, ultra-low leakage current, and high reliability, helping designers create safer and more efficient systems across a wide range of applications.”

The NXJ1T series will be showcased at Murata's booth (stand 508 – hall 9) during PCIM 2025 in Nuremberg Messe, Germany, from May 6th to 8th.

www.murata.com