Bourns MF-SD/250 Telecom PTC Resettable Fuses

Bourns MF-SD/250 Telecom PTC Resettable Fuses feature a surface-mount package containing twin 250V polymer fuses to save space. Bourns MF-SD/250 twin pack provides tip and ring overcurrent protection with high voltage surge capabilities. These fuses are designed for secondary overcurrent protection in customer premise equipment (CPE), central office (CO), and subscriber line interface card (SLIC) applications.


  • Tip and ring line protection with two devices in one surface-mount package
  • High voltage surge capabilities
  • Assists in meeting ITU-T K.20 / K.21 / K.45 specifications as well as Telcordia GR-1089 intra-building
  • RoHS compliant


  • Used as a secondary overcurrent protection device in:
    • Customer Premise Equipment (CPE)
    • Central Office (CO)
    • Subscriber Line Interface Cards (SLIC)
Publicado: 2010-07-30 | Actualizado: 2022-03-11