1206SFS Series - 1206 Size Lead-Free, Halogen Free, Slow-Blow Chip Fuse

Roll Over to Zoom
Disclaimer Notice

Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

Available in industry standard 1206 and 0603 chip sizes, Littelfuse’s slow-blow chip fuses help provide overcurrent protection on systems that experience large and frequent current surges as part of their normal operation (at voltages up to 63 VDC).

The slow-blow chip fuse’s monolithic, multilayer design helps provide some of the highest current ratings available in the 1206 and 0603 footprints and enhances high-temperature performance in a wide range of circuit protection designs. The devices’ small size, high reliability and strong arc suppression characteristics make them suitable for overcurrent protection of power supplies, capacitor filter banks, Liquid Crystal Display (LCD) backlight inverters, electric motors and portable electronics.


  • Time-delayed design prevents nuisance openings in pulsed and high inrush current applications
  • Small size with high-current ratings
  • Strong arc suppression characteristics


  • Lead-free materials and RoHS compliant
  • Halogen free
  • High-temperature performance
  • -55°C to +125°C operating temperature range


  • Small motors systems
  • Portable electronics
  • Input power ports
  • Power over Ethernet (PoE)
  • Test equipment
  • POL converter protection
  • Computer drives
  • Displays
  • Printers

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VDC (V)Nominal Melting I2T (A2sec)Resistance
Max Operating Temp (°C)SizeProduct
1206SFS100F/63-21630.110.361251206Product SpecificationCheckOrder
1206SFS125F/63-21.25630.220.21251206Product SpecificationCheckOrder
1206SFS150F/63-21.5630.230.151251206Product SpecificationCheckOrder
1206SFS200F/63-22630.630.0881251206Product SpecificationCheckOrder
1206SFS250F/32-22.5320.90.071251206Product SpecificationCheckOrder
1206SFS300F/32-23321.20.0321251206Product SpecificationCheckOrder
1206SFS350F/32-23.5321.60.0281251206Product SpecificationCheckOrder
1206SFS400F/32-24322.20.0241251206Product SpecificationCheckOrder
1206SFS450F/32-24.5323.60.021251206Product SpecificationCheckOrder
1206SFS500F/32-25325.30.0161251206Product SpecificationCheckOrder
1206SFS550F/24-25.5246.40.0141251206Product SpecificationCheckOrder
1206SFS600F/24-26248.50.0111251206Product SpecificationCheckOrder
1206SFS700F/24-2724100.011251206Product SpecificationCheckOrder
1206SFS800F/24-282416.90.0091251206Product SpecificationCheckOrder