0209001. - 209 Series

Series: 209 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.

Littelfuse 209 Series 350V time-lag (Slo-Blo) fuses are available in cartridge form or with axial leads. This series provides the same performance characteristics as its 3AG counterpart, while occupying one-third the space. Sleeved fuses are available. 


  • In accordance with Underwriter's Laboratories™ Standard UL 248-14
  • Fuses are coard washable in most solvents
  • Available in cartridge and axial lead form and with various forming dimensions
  • RoHS compliant and lead free

Property (Mouseover for details) Value
Ampere Rating (A) 1
Body Glass Body(borosilicate)
Nominal Melting I2T (A2sec) 5.64
Interrupting Rating 100A@350VAC
Marking Code MX
Moisture Sensitivity Level Contact Littelfuse
Nominal Cold Resistance (Ohms) 0.21
Opening Slo-Blo/Time Lag (T)/Time Delay
Min Operating Temp °C -60
Max Operating Temp (°C) 125
Package Size 2AG (5x15mm)
VAC (V) 350

ICPTest_209 pdf

Littelfuse_Suzhou_CQCISO14001icon Suzhou CQC ISO 14001

Littelfuse_Suzhou_CQCISO9001 2000icon Suzhou CQC ISO 90012000 GBT 19001 2000

Littelfuse_Suzhou_ISOTS16949icon Suzhou ISOTS 16949

METI_NBK200405 E10480Cicon UL_NBK200405_E10480C_5_14_15

METI_NBK200405 E10480Dicon UL_NBK200405_E10480D_5_14_15

curus cUR_JDYX8_E10480_101211901

UR UR_JDYX2_E10480_101211901

pdf icon Fuse 209 Datasheet

Littelfuse 209 Series (2AG) 350V, Time-Lag (Slo-Blo®) Fuses are available in cartridge form or with axial leads...

pdf icon Littelfuse Fuse Accessories Selection Guide

A quick reference guide to selecting holders, blocks and clips for fuse applications...

pdf icon Fuse Selection Guide

A quick reference guide to selecting fuses for electronic applications...

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...

pdf icon Electronic Fuse Products Catalog

Littelfuse Electronic Fuse Products Catalog -- Miniature Fuse Products for Overcurrent Protection of Small Electrical and Electrical Applications...