Naxinwei: Launches Solid-State Relay – NSI7117

Recently, NSI Micro officially launched its next-generation solid-state relay NSI7117 series. The new devices are designed for battery management systems in new-energy vehicles ( BMS ) and other key application scenarios, the electromagnetic compatibility performance has been optimized in a targeted manner ( EMC ), in electromagnetic interference suppression ( EMI ) and electromagnetic immunity ( EMS ) Achieving system-level improvements on two fronts, it comprehensively meets the increasingly stringent electromagnetic compatibility requirements of new-energy vehicles, providing robust support for highly reliable automotive applications.

New energy vehicles BMS Because the system is directly connected to the high-voltage battery pack, it inherently demands exceptionally high electromagnetic compatibility (EMC) performance, requiring stable operation of sampling, sensing, and control functions even in complex electromagnetic environments. Today, driven by the trend toward lightweighting in new‑energy vehicles, battery systems are rapidly evolving toward multi‑material battery‑pack architectures. While the incorporation of composite materials enables both weight reduction and structural integration, it also diminishes the natural electromagnetic shielding provided by traditional metal enclosures, thereby… BMS The system is confronted with an increasingly complex and demanding electromagnetic environment. Against this backdrop, Novosense’s next-generation solid-state relays… NSI7117 Through optimization EMC Design helps automakers and battery manufacturers achieve a higher level of system reliability in the context of the multi-material structural trend.

Outstanding EMC Performance and robust electromagnetic compatibility in demanding environments for multi-material battery systems.

Naxin Micro NSI7117 Targeting BMS The electromagnetic interference characteristics in high-voltage applications have been systematically optimized, achieving industry-leading electromagnetic compatibility performance. EMC ). During system integration testing with key customers, based on real-world application scenarios, NSI7117 In electromagnetic interference emission ( EMI ) performs exceptionally well in:

•     Electrostatic discharge immunity ( ESD ， ISO 10605 ) Through in shutdown mode ±8kV Test;

•     Electrical Fast Transient/Burst ( EFT ， IEC 61000-4-4 ) reach Class 4 Level;

•     Conducted and Radiated Emissions ( CISPR 25 ) respectively reach the voltage method Class 3 or 4 (According to different frequency points), current method Class 5 and radiated emissions Class 5 The level effectively reduces system-level electromagnetic radiation introduced during the switching process.

Thanks to the excellent EMI Control capability enables customers to significantly reduce board-level corrective measures such as filtering and shielding during the overall system development process, thereby lowering… EMC Reduce debugging complexity and shorten the development cycle.

In electromagnetic immunity ( EMS ) in terms of, NSI7117 It also boasts excellent system robustness. The device can operate across the entire frequency range via… 200mA Large Current Injection Test ( BCI ， ISO 11452-4 ， Class A ), and successfully passed the radiation immunity test ( RI ， ISO 11452-2 ， Class A ) and handheld transmitter immunity testing ( PTI ， ISO 11452-9 ， Class 2 ).

Against the backdrop of multi-material battery casings reducing shielding effectiveness and further complicating the system’s electromagnetic environment, NSI7117 It can effectively reduce the risk of false triggers and abnormal switching, thereby providing… BMS The system delivers enhanced electromagnetic reliability and robust security. Moreover, its highly robust anti‑interference design helps reduce the need for redundant protective measures at the system level, further simplifying the hardware architecture and verification process.

Reliability has been comprehensively upgraded, accelerating the replacement of mechanical relays and optocoupler relays.

Compared with mechanical relays and optocoupler relays, solid-state relays in new energy vehicles… BMS It offers superior overall performance. Mechanical relays suffer from contact wear, limited lifespan, and relatively slow response times; while optocoupler relays improve isolation, they still face limitations in terms of voltage withstand, leakage current, and long-term stability.

Solid-state relays, which are based on semiconductor-based contactless switching, offer higher reliability and longer service life, and can operate reliably under harsh conditions such as high voltage and high temperature, effectively reducing the risk of system failure. They are increasingly becoming the preferred choice for high-voltage applications. BMS An important selection criterion for switching devices in the system.

On this basis, Novosem NSI7117 Further breakthroughs have been achieved in high-voltage capability and reliability under extreme operating conditions. The product integrates two chips internally. SiC MOSFET , each device supports up to 1700V It exhibits high voltage withstand capability, with excellent avalanche resistance and transient overvoltage tolerance. This characteristic enables it to maintain stable operation even under abnormal conditions in battery systems—such as surges or voltage spikes—thereby effectively enhancing the system’s safety margins.

Meanwhile, NSI7117 Its ability to control leakage under high-voltage, high-temperature conditions is equally outstanding. In 1000V Operating voltage, 125℃ Under high-temperature conditions, the device leakage current can be kept within 1 μA Within this range, it significantly outperforms conventional solutions. This feature helps elevate the overall insulation impedance of the battery pack, reduce the risk of system misjudgments, and improve the accuracy of insulation monitoring, thereby enhancing the vehicle’s human–machine interaction safety under high-voltage conditions.

Meets various safety regulatory requirements and reduces system verification time.

NSI7117 Provide SOW12 Encapsulation, compatible with mainstream optocoupler relays on the market, enabling customers to seamlessly replace and upgrade. In SOW12 Under encapsulation, NSI7117 Achieve 5.91mm Creepage distance on the secondary side; the creepage distance on both the primary and secondary sides also reaches 8mm , satisfy IEC 60747-17 Relevant requirements.

Combining with Naxinwei’s mature capacitive isolation technology, NSI7117 The isolation withstand voltage capability is as high as 5kVrms , and satisfy UL 、 CQC and VDE Compliance with authoritative certification standards helps customers streamline system-level certification processes and shorten product development and time-to-market cycles.

Meanwhile, NSI7117 By leveraging a fully domestic supply chain, we further enhance supply security and delivery reliability. NSI7117 It is about to enter mass production—the automotive-grade version. NSI7117-Q1 satisfy AEC-Q100 Grade 1 Requirements, support –40°C To 125°C It features a wide operating temperature range and is also available in an industrial‑grade version, meeting the requirements of diverse application scenarios.

(Source: Naxinwei Official Website)