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 #VAC (V)Resistance
Nominal Melting I2T (A2sec)Min Operating Temp (°C)Max Operating Temp (°C)MSLOpeningPartner ECAD ModelsStockSamplesCompare
397035000001250.56650.6-4085MIL-STD-202 Method 106Transient Tolerant (T)39703500000CheckOrder
397035004401250.56650.6-4085MIL-STD-202 Method 106Transient Tolerant (T)39703500440CheckOrder
397050000001250.342370.79-4085MIL-STD-202 Method 106Transient Tolerant (T)39705000000CheckOrder
397050004401250.342370.79-4085MIL-STD-202 Method 106Transient Tolerant (T)39705000440CheckOrder
397080000001250.16162.4-4085MIL-STD-202 Method 106Transient Tolerant (T)39708000000CheckOrder
397080004401250.16162.4-4085MIL-STD-202 Method 106Transient Tolerant (T)39708000440CheckOrder
397110000001250.099993.5-4085MIL-STD-202 Method 106Transient Tolerant (T)39711000000CheckOrder
397110004401250.099993.5-4085MIL-STD-202 Method 106Transient Tolerant (T)39711000440CheckOrder
397112500001250.071585-4085MIL-STD-202 Method 106Transient Tolerant (T)39711250000CheckOrder
397112504401250.071585-4085MIL-STD-202 Method 106Transient Tolerant (T)39711250440CheckOrder
397115000001250.052178.5-4085MIL-STD-202 Method 106Transient Tolerant (T)39711500000CheckOrder
397115004401250.052178.5-4085MIL-STD-202 Method 106Transient Tolerant (T)39711500440CheckOrder
To request product environmental information, please complete the Product Environmental Information Request Form.

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