30409 ATO Circuit Breakers Series - Type I Automatic Reset

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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.

Circuit breakers and fuses are a cost-effective solution to protecting wiring, equipment and subsystems. While fuses are a one-time, disposable solution, circuit breakers can be re-used after overload. Part number suffixes indicate the amperage. eg: 30409-15 is a 15 ampere Type I ATO breaker. 

  • Terminals are grooved so that they can be easily snapped off with pliers to fit the electrical blocks of different vehicles. Amperages 10, 15, 20, 25, 30 available in bulk, box or BP.
  • Use as is (long terminals) for Kenworth trucks. Use with one segment snapped off each terminal for: Dodge trucks, Ford heavy trucks, Navistar trucks. Use with two segments snapped off (short terminals) for Ford pickup trucks.
  • Color-coded housings with rating marked on the top: 10A red, 15A blue, 20A yellow, 25A silver, 30A green.
  • Conform to SAE J553.

Access specifications, certifications, check availability and order parts below

Catalog #Current Rating (Max)Mounting MethodHousingStockCompare
Obsolete: 2021 -12-06
15BladePlated SteelCheck
Obsolete: 2021 -12-06
20BladePlated SteelCheck
Obsolete: 2021 -12-06
Obsolete: 2021 -12-06
30BladePlated SteelCheck
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
30409-15 CIR BRKR 15AMP RoHS No PbFree No
30409-20 CIR BRKR 20AMP RoHS No PbFree No
30409-25 CIR BRKR 25AMP RoHS No PbFree No
30409-30 CIR BRKR 30AMP RoHS No 09/24/2020 PbFree No 09/24/2020 CoC_RoHS9_30409-30 REACH209_Declaration_Contain-_30409-30 Yes
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