Littelfuse has announced the NANO2 surface-mount 708 series fuse, the first Littelfuse surface-mount fuse offering a 14000A interrupting rating at 80V DC.
Engineered for next-generation 48V DC power architectures, the 708 series addresses the growing protection demands of AI servers, hyperscale data centres, and high-density power distribution systems. As power levels rise and board space shrinks, designers have been forced to rely on oversized, manually installed through-hole or bolt-down fuses. The 708 series provides a compact, automation-friendly alternative without compromising performance.
The NANO2 708 series combines high current ratings (60A to 200A) with an industry-leading interrupting rating in a compact surface-mount package. This enables designers to protect circuits exposed to high fault currents while optimising layout efficiency and enabling fully automated assembly processes.
“With this new fuse – our first Littelfuse surface-mount fuse to deliver a 14000A interrupt rating at 80V DC – we’re giving designers using legacy through-hole or bolt-down solutions a path to transition to surface-mount technology,” said Daniel Wang, Senior Director of Product Management, Over Current–Passives, at Littelfuse. “That shift enables automated manufacturing, improves productivity, and reduces overall system cost.”
Key features and benefits include:
- Interrupting rating: 14kA at 80V DC, supporting high fault current environments
- High current capability: 60A to 200A range for demanding power applications
- Compact surface-mount footprint: enables space savings and supports high-density designs
- Automation-ready assembly: eliminates manual installation associated with legacy fuse formats
- Robust performance: high pulse resistance and compliance with global safety standards
The 708 series is designed as supplemental overcurrent protection for circuits where high fault current is anticipated, including power distribution units (PDUs), power shelves, battery backup units (BBUs), and power supply units (PSUs). It is particularly well-suited for AI server clusters, networking equipment, and hyperscale data centre infrastructure.
Additional applications include renewable energy systems and battery management systems (BMS), where compact, high-power protection solutions are critical.
The 708 series is part of a broad Littelfuse portfolio of 48V protection solutions for data centre infrastructure, complementing existing fuse families including the 456, 871, and 881 series.
The NANO2 surface-mount 708 series fuse are available in tape-and-reel packaging in quantities of 500.
