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Series: 257
257 Series - ATO® Fast-Acting Automotive Blade Fuse
Technology: Fuses
The ATO� Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating.


Electrical Characteristics

Access specifications, certifications, check availability and order parts below:

Check distributor stock availability by clicking on the [CHECK] link. View certification PDF files by clicking on the certification logo. View the part details by clicking on the part number. To order sample parts, click on the [ADD] link. Click on the 'Key' button to view definitions for each column header. Sort parts by clicking on the column you wish to sort by.


CatalogNo Certs. Amps (A) Nominal Melting I2T (A2sec) Resistance
(Ω)		 IR Stock Sample
Cart
0257001. 10.40.1231000A@32VDC [Check] [Add]
0257002. 21.40.051000A@32VDC [Check] [Add]
0257003. 37.40.0311000A@32VDC [Check] [Add]
0257004. 4140.0231000A@32VDC [Check] [Add]
0257005. 5260.0181000A@32VDC [Check] [Add]
0257010. 101150.00771000A@32VDC [Check] [Add]
0257015. 153400.00481000A@32VDC [Check] [Add]
0257020. 205200.00331000A@32VDC [Check] [Add]
0257025. 2510800.00251000A@32VDC [Check] [Add]
0257030. 3015100.00191000A@32VDC [Check] [Add]
0257035. 3522800.00161000A@32VDC [Check] [Add]
0257040. 4033100.00141000A@32VDC [Check] [Add]
02570501V [Check] [Add]
02570503X [Check] [Add]
02570540V [Check] [Add]
02570575V [Check] [Add]
025707.5 7.5600.0111000A@32VDC [Check] [Add]
0257601.V [Check] [Add]
257001
Replaced By 0257001 		10.40.1231000A@32VDC [Check] [Add]
257002
Replaced By 0257002 		21.40.051000A@32VDC [Check] [Add]
257003
Replaced By 0257003 		37.40.0311000A@32VDC [Check] [Add]
257004
Replaced By 0257004 		4140.0231000A@32VDC [Check] [Add]
257005
Replaced By 0257005 		5260.0181000A@32VDC [Check] [Add]
257010
Replaced By 0257010 		101150.00771000A@32VDC [Check] [Add]
257015
Replaced By 0257015 		153400.00481000A@32VDC [Check] [Add]
257020
Replaced By 0257020 		205200.00331000A@32VDC [Check] [Add]
257025
Replaced By 0257025 		2510800.00251000A@32VDC [Check] [Add]
257030
Replaced By 0257030 		3015100.00191000A@32VDC [Check] [Add]
257035
Replaced By 0257035 		3522800.00161000A@32VDC [Check] [Add]
257040
Replaced By 0257040 		4033100.00141000A@32VDC [Check] [Add]
25707.5
Replaced By 025707.5 		7.5600.0111000A@32VDC [Check] [Add]