Bourns SinglFuse™ SF-3812TM-T Telecom Fuses

Bourns SinglFuse™ SF-3812TM-T Telecom Fuses are ideal for telecom circuit applications requiring low current protection with high surge tolerance. These fuses have a rated voltage of 600VAC with current ratings of 0.5A, 1.25A, and 2A. The fuses are designed for high-definition video streaming and digital Internet of Things (IoT) devices in businesses and homes. Bourns SinglFuse SF-3812TM-T Telecom Fuses are is best suited for telecommunication applications and surge protection systems. The series comply with Telcordia GR-1089-CORE Issue 7 and UL 60950 standards and are UL 248-14 listed.


  • Single blow fuse for overcurrent protection
  • Ceramic tube wire-in-air design
  • Gold-plated brass end caps
  • EIA 3812 surface mount footprint
  • 600VAC with 0.5A, 1.25A, and 2A current ratings
  • Breaking capacity 60A @600VAC
  • -55°C to +125°C operating temperature range
  • Tape-and-reel packaging for automated assembly
  • Telcordia GR-1089-CORE and UL 60950 compliant
  • UL 248-14 listed
  • RoHS compliant
  • Halogen-free


  • Telecom and networking equipment
  • T1/E1/J1
  • 10/100/1000 BaseT Ethernet
  • Fiber to the curb (FTTC)
  • Fiber to the premises (FTTP)
  • Plain old telephone systems (POTS), including phones, modems, and security systems

Basic Construction

Chart - Bourns SinglFuse™ SF-3812TM-T Telecom Fuses

Application Circuit

Application Circuit Diagram - Bourns SinglFuse™ SF-3812TM-T Telecom Fuses
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