KYOCERA AVX, a global pioneer in advanced electronic components, has officially expanded its highly acclaimed TransGuard VT Series. This expansion introduces state-of-the-art 48V automotive MLVs designed specifically for next-generation power supply systems. These new components are engineered to accelerate technological innovation in the rapidly evolving electric and commercial vehicle markets.
Previously, the TransGuard VT Series made headlines as the very first in the industry to offer multilayer varistors rated for an impressive 175°C operation. Now, this latest addition focuses on stabilizing and protecting the increasingly popular higher-voltage architectures found in modern automobiles. It represents a massive step forward for automotive engineering, ensuring long-term reliability in extreme conditions.
The Rise of 48V Power Supply Systems in Vehicles
As the automotive sector transitions toward mass electrification, standard 12V systems are frequently no longer sufficient. Automakers are rapidly adopting higher voltage architectures to handle the increased electrical load of modern infotainment, safety, and performance features. Consequently, the industry-wide demand for robust 48V automotive MLVs has skyrocketed in recent years.
These specialized components are strictly critical for safeguarding sensitive on-board electronics against unpredictable power surges. From advanced driver-assistance systems (ADAS) to heavy-duty motor controls, reliable transient voltage suppression is now mandatory. By addressing this need, KYOCERA AVX is positioning itself directly at the forefront of this global manufacturing shift.
Engineering the Future with ZnO-Based Ceramics
The core of the TransGuard VT Series utilizes highly advanced zinc-oxide-based (ZnO-based) ceramic semiconductor materials. These meticulously engineered materials allow the components to act as highly sensitive, rapid-response switches during electrical anomalies. When a voltage spike occurs, the ceramic structure instantly clamps down to protect downstream components.
This material science breakthrough is what allows these devices to handle massive amounts of energy in such a tiny footprint. It completely redefines how circuit designers approach overvoltage scenarios in restricted automotive spaces.
What Makes 48V Automotive MLVs Essential?
Beyond simple voltage clamping, these compact, surface-mount technology (SMT) packages deliver incredibly reliable bidirectional overvoltage protection. Furthermore, they provide excellent EMI/RFI attenuation capabilities, acting as a powerful two-in-one shield for delicate circuitry. This dual-functionality is a massive advantage for engineers dealing with complex, noisy electrical environments.
By combining these features, engineers can drastically reduce their reliance on discrete MLCCs (Multilayer Ceramic Capacitors). This integration provides substantial savings in both bill of materials (BOM) costs and valuable printed circuit board (PCB) real estate. For high-volume automotive manufacturing, these space and cost reductions are vital for maintaining competitive margins.
Unpacking the TransGuard VT Series Specifications
When it comes to surviving harsh operational environments, these transient voltage suppression (TVS) devices are virtually unmatched. They boast operating temperatures ranging from a freezing -55°C all the way up to an extreme +175°C. Most impressively, they achieve this broad operational threshold with absolutely zero derating across the entire temperature spectrum.
To ensure absolute reliability, these 48V automotive MLVs are fully qualified to stringent industry standards, including AEC-Q200, IEC 61000-4-2, and ISO 10605. They also feature the highest human-body model (HBM) electrostatic discharge (ESD) classification available: Class 6. This elite Class 6 rating guarantees the devices can reliably withstand over 25,000V of sudden electrostatic discharge.
Additionally, they boast the lowest moisture sensitivity level possible, categorized as MSL 1. This grants them an unlimited floor life under specified conditions, fundamentally streamlining the manufacturing process. It completely eliminates the need for any special dry packing procedures or time-consuming pre-reflow baking protocols.
FLEXITERM Technology: Built for Harsh Environments
Automotive environments are notoriously punishing, constantly subjecting delicate electronics to severe movement, engine vibrations, and extreme heat. To combat this, several parts within the series—including select 48V automotive MLVs—feature KYOCERA AVX’s proprietary FLEXITERM terminations. These advanced physical terminations are engineered specifically to absorb severe mechanical stress without failing.
They can seamlessly endure up to 5mm of mechanical board flexure without sustaining any internal cracking or microscopic fractures. Furthermore, they can survive up to 3,000 rigorous temperature cycles reaching up to 150°C. This level of durability significantly exceeds standard testing requirements, which only demand 1,000 cycles at up to 125°C.
Key Applications for Advanced Transient Voltage Suppression
The engineering versatility of these components makes them indispensable across multiple heavy-duty mobility sectors. Ideal applications naturally include protecting high-temperature automotive, industrial, and commercial transportation systems from catastrophic electrical failure. They defend effectively against ESD, load dumps, and dangerous voltage spikes caused by AC and DC motors.
These electrical disruptions frequently originate from engines, radiators, relays, jump starts, and uninterruptible power supplies (UPS). The newly designed 48V automotive MLVs are meticulously tested specifically for motor vehicles utilizing these exact 48V power infrastructures. They are currently available in five distinct EIA chip sizes (0805, 1206, 1210, 1812, and 2220) to suit various spatial needs.
Furthermore, they are rated for 56VDC or 40VAC working voltages, with clamping voltages ranging between 100–110V and jump-start capabilities of 48V. This makes them perfect for the booming electric vehicle market, spanning everything from e-bikes and golf carts to heavy commercial fleets.
Looking Ahead: Securing Automotive Electronics
Other universally shared attributes across the TransGuard VT Series include RoHS-compliant, 100% matte-tin-plated terminations equipped with specialized nickel barriers. They are distributed in highly efficient tape and reel packaging, offering flexible quantities of 1,000, 4,000, or 10,000 parts for rapid, automated assembly lines.
“Our tested and proven TransGuard VT Series provides excellent bidirectional overvoltage protection and EMI/RFI attenuation in a single SMT package,” stated Perrin Hardee, Product Marketing Manager at KYOCERA AVX. He emphasized that they proudly feature the highest-rated operating temperatures in the entire multilayer varistor industry.
Hardee noted that the company is incredibly excited to extend these cost and performance advantages directly to their automotive manufacturing partners. Given the massive proliferation of sensitive automotive electronic systems today, integrating reliable 48V automotive MLVs is more crucial than ever. As vehicles become smarter and more electrified, these specialized components will continue to serve as the invisible guardians of our daily commutes.
