328 and 688 Series Surge-Tolerant Fuses

Littelfuse's compact, surge-tolerant fuses withstand high lightning surge

The new 328 and 688 series fuses offer protection superior to that of circuit breakers, providing short-circuit and overload protection and ensuring long-term reliability for outdoor applications that operate at high-surge-exposure levels. They also reduce the level of nuisance fuse tripping caused by indirect lightning surges. The 328 series fuse is optimized for outdoor LED lighting applications to protect surge protection devices (SPDs) and luminaries. Both series can be used in power distribution equipment used in wireless telecommunication base transceiver stations (BTS).

  • High-surge-withstanding capability: can withstand 20 hits of 10 kA 8/20 μs surge current without wear-out
  • Compact form-factors with cartridge and axial-lead (pigtail) package options
  • High breaking capacity
  • Operating temperature range: -55°C to 125°C
  • Enhances over-current and short-circuit protection; reduces power downtime caused by nuisance activation caused by indirect lightning surge
  • Small fuse body makes it easier to place in outdoor luminaire and telecom equipment in BTS and ISP datacenters
  • Ensures the fuse will open safely under high fault conditions
  • Suitable for high-temperature outdoor LED lighting or radio antenna applications

328 Series

Manufacturer Part Number Description Available Quantity Datasheets
0328021.MXP FUSE 300V HIGH I2T 3AB 21A 89
0328021.MXEP FUSE 300V HIGH I2T 3AB 21A 999

688 Series

Manufacturer Part Number Description Available Quantity Datasheets
0688030.MXP FUSE 70VDC 6X25 30A 980