397 Series - CP Subminiature Fuses

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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, 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.


  • Lead-free/RoHS Compliant
  • Surge proof for telecom applications
  • Reduced PCB space requirements
  • Direct solderable or plug-in versions
  • Low internal resistance
  • Shocksafe casing
  • Vibration resistant
  • Halogen free

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VAC (V)Resistance
Interrupting RatingNominal Melting I2T (A2sec)Min Operating Temp (°C)Max Operating Temp (°C)MSLNom
397035000000.351250.566550A@125VAC0.6-4085MIL-STD-202 Method 106140400Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397035004400.351250.566550A@125VAC0.6-4085MIL-STD-202 Method 106140400Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397050000000.51250.3423750A@125VAC0.79-4085MIL-STD-202 Method 106170340Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397050004400.51250.3423750A@125VAC0.79-4085MIL-STD-202 Method 106170340Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397080000000.81250.161650A@125VAC2.4-4085MIL-STD-202 Method 106240300Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397080004400.81250.161650A@125VAC2.4-4085MIL-STD-202 Method 106240300Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
3971100000011250.0999950A@125VAC3.5-4085MIL-STD-202 Method 106240240Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
3971100044011250.0999950A@125VAC3.5-4085MIL-STD-202 Method 106240240Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397112500001.251250.0715850A@125VAC5-4085MIL-STD-202 Method 106250200Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397112504401.251250.0715850A@125VAC5-4085MIL-STD-202 Method 106250200Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397115000001.51250.0521750A@125VAC8.5-4085MIL-STD-202 Method 106285190Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder
397115004401.51250.0521750A@125VAC8.5-4085MIL-STD-202 Method 106285190Transient Tolerant (T)TE5 (8.5x8mm)CheckOrder

397 Series Multiple TC Curve

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