The DFNAK3 Series of High-Power TVS Diodes has been introduced, according to Littelfuse. These compact surface mount devices are perfect for protecting DC-powered systems and Power over Ethernet (PoE) applications in demanding situations because they offer the maximum surge current protection possible in such a small footprint, 3 kA (8/20 µs).
Littelfuse announces the launch of the DFNAK3 Series of High-Power TVS Diodes. These compact surface mount devices deliver 3 kA (8/20 µs) surge current protection—the highest available in such a small footprint—making them ideal for safeguarding DC-powered systems and Power over Ethernet (PoE) applications in demanding environments.
Key Features and Benefits
- 3 kA (8/20 µs) surge current rating for high-reliability DC and PoE systems
- Compact DFN surface mount packages save up to 70% PCB space
- Lower clamping voltage for superior protection of sensitive downstream electronics
- Breakdown voltage above reverse standoff voltage ensures reliable DC line and PoE protection
- Aids compliance with IEC 61000-4-5 (Level 4) and other surge protection standards
The DFNAK3 Series is the smallest 3 kA-rated TVS diode currently available on the market since it uses a compact DFN packaging, in contrast to conventional high-surge TVS diodes that are available in large surface mount or cumbersome axial-leaded packages.
It is 70% lower in height than typical SMD-type coated packages and has a 70% smaller footprint than overcoated equivalents. This allows for high-density, space-constrained PCB designs without sacrificing system durability or surge performance.
Engineered to meet IEC 61000-4-5 Level 4 requirements, the DFNAK3 Series provides a compelling alternative to standard TVS diodes, MOVs, and GDTs, thanks to its lower clamping voltage and superior transient suppression.
The surface mount configuration also supports cost-effective, automated PCB assembly, reducing overall production complexity.
Target Applications
- DC bus protection for Small Cells, Remote Radio Units (RRUs), and Baseband Units (BBUs)
- Power over Ethernet (PoE) systems
- DC power supplies in AI infrastructure and data center servers
- Industrial DC power supplies operating in harsh environments
The DFNAK3 Series continues the Littelfuse mission to deliver innovative surface mount protection solutions in response to evolving customer needs for higher performance in smaller form factors.
Leadership Comments
“The DFNAK3 Series empowers designers to meet today’s miniaturization and performance demands,” said Jenny Chen, Product Marketing Manager, Protection at Littelfuse. “It enables compact, high-density system designs while delivering the same high surge rating as bulkier components—ensuring robust protection for mission-critical applications such as PoE, remote radio units, and data center power supplies.”
Availability
The New Series are available in tape and reel format in quantities of 1,500. Sample requests are accepted through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.
To Know More
Additional information is available on the DFNAK3 Series product page.
