430 Series - 1206 Slo-Blo® Thin-Film Fuse

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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.

The 430 series time-lag (Slo-Blo) surface mount fuse series is a small (1206 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices.

For RoHS compliant and lead-free design, please refer to the Littelfuse 468 series thin film fuse. 


  • For RoHS compliant and Lead-Free designs use 468 series
  • Time delay feature withstands high in-rush currents and prevents nuisance openings
  • Package is visually distinct from fast-acting version for easy identification
  • Top side marking allows visual verification of amperage rating

Access specifications, certifications, check availability and order parts below

Catalog #VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
BodyMin Operating Temp (°C)Max Operating Temp (°C)OpeningCompare
Obsolete: 2008 -11-16
Replaced By: 0468.500NR0468.500
63630.03050.25Epoxy Substrate-5590Slo-Blo/Time Lag (T)/Time Delay
Obsolete: 2008 -11-16
Replaced By: 0468001.NR0468001.
63630.1440.097Epoxy Substrate-5590Slo-Blo/Time Lag (T)/Time Delay
Obsolete: 2008 -11-16
Replaced By: 0468002.NR0468002.
63630.4940.039Epoxy Substrate-5590Slo-Blo/Time Lag (T)/Time Delay
Obsolete: 2008 -11-16
Replaced By: 0468003.NR0468003.
32321.330.02Epoxy Substrate-5590Slo-Blo/Time Lag (T)/Time Delay
Obsolete: 2008 -11-16
Replaced By: 046801.5NR046801.5
63630.2980.056Epoxy Substrate-5590Slo-Blo/Time Lag (T)/Time Delay
To request product environmental information, please complete the Product Environmental Information Request Form.

430 Series Time Curve Data

PCN EFU100 3_PCN Obs_Non RoHS_Thin Film fuse_032708icon Non RoHS Thin Film Fuse Obsoletion

PCN# EFU100-3 Littelfuse Inc. would like to inform customers that it will cease production of its Non-RoHS compliant and lead based Surface Mount Thin Film Fuses products on December 31 2008. The product series impacted are the following. Thin Film Fuse Series - 0430, 0433, 0434 and the 0429xxx.WRM series. The final date for which orders will be taken is September 30, 2008. In all cases Littelfuse has RoHS and Lead-Free alternative series now available . The most up to date information on these series can be found on the Littelfuse website, http://www.littelfuse.com/. Littelfuse Inc is implementing this change so that it can continue to pursue a policy of manufacturing and selling "Green" products.

EC611 Circuit Protection for Lithium Ion and Lithium Polymer Rechargeable Battery Applications

This application note summarizes how the increased use of Lithium-Ion and Lithium Polymer battery packs in applications where user safety is critical, the implementation of secondary protection circuits will ensure an unsurpassed level of safety with minimal cost impact.

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