688030 - 688 Series

Series: 688 Questions? Contact Littelfuse Support
Roll Over to Zoom
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.

The 688 series is a 70Vdc rated slow blow ceramic cartridge fuse in 6x25mm form factor, designed in accordance to UL248-14 standard.


  • High Interrupting Rating: 2500A@70Vdc
  • High Surge Withstand Capability
  • Compact form factor with cartridge and axial lead version
  • Lead-Free, RoHS compliant, Halogen-Free
  • Operating Temperature: -55°C to 125 °C



  • SPD in telecom data center
Property (Mouseover for details) Value
Ampere Rating (A) 30
VDC (V) 70
Body Ceramic Body
Nominal Melting I2T (A2sec) 4200
Min Operating Temp °C -55
Max Operating Temp (°C) 125
Marking Code VX
Moisture Sensitivity Level Contact Littelfuse
Nominal Cold Resistance (Ohms) 0.0021
Opening Slo-Blo/Time Lag (T)/Time Delay
Package Size 6x25mm

Littelfuse_TUV_R50119583icon TUV_T_50257715_01_6_18_13

UL_JDYX8icon CUR_JDYX8_E10480_10_30_14

UR UR_JDYX2_E10480_9_30_14

pdf icon Product Selection Guide

Electronics Circuit Protection Product Selection Guide - A guide to selecting Littelfuse circuit protection components for electronic applications...

pdf icon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive, industrial, handheld, computer and telecom markets...

    HalogenFree8/9/2016 PbFree8/9/2016 RoHS8/9/2016