251 Series - PICO® II Very Fast-Acting Subminiature Axial leaded fuse

Series: 251
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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 PICO® II Very Fast-Acting Fuse is designed to meet an 
extensive array of performance characteristics in a 
space-saving subminiature package.

 

Features:

  • Very fast-acting
  • Small size
  • Wide current rating range (62mA- 15A)
  • RoHS compliant 
  • Halogen-free available 
  • Wide operating temperature range
  • Low temperature rerating

 

Application Spotlight

 
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Access specifications, certifications, check availability and order parts below

Catalog #VAC (V)VDC (V)VibrationNominal Melting I2T (A2sec)Resistance
(Ω)		BodyMSLOpeningPartner ECAD ModelsStockSamplesCompare
0251.062125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.0001137CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.062CheckOrder
0251.125125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.001741.7CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.125CheckOrder
0251.200125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.895CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.200Check
0251.250125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.01160.665000021CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.250CheckOrder
0251.375125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.02960.395000011CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.375CheckOrder
0251.500125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.05980.280000001CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.500CheckOrder
251_630125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.080.205CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)251-630CheckOrder
0251.750125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.1760.174999997CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251.750CheckOrder
0251001.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.2560.128000006CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251001.CheckOrder
0251002.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.4050.0473CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251002.CheckOrder
0251003.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)1.190.028999999CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251003.CheckOrder
0251004.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)2.450.020400001CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251004.CheckOrder
0251005.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)4.140.0155CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251005.CheckOrder
0251007.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)10.40.0105CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251007.CheckOrder
025101.5125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.7210.035999998CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)025101.5CheckOrder
025101.6125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.07CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)025101.6Check
0251010.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)25.50.00705CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251010.CheckOrder
0251012.3232MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)45.2000010.005CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251012.Check
0251015.125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.7210.035999998CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)0251015.CheckOrder
025102.5125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.7210.035999998CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)025102.5CheckOrder
025103.5125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)1.580.024CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)025103.5CheckOrder
02511.25125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.390.100000001CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)02511.25CheckOrder
02513.15125125MIL-STD-202 Method 201 (10v55 Hz); Method 204 Test Condition C (55v2000 Hz at 10 Gµs Peak)0.0364CeramicMIL-STD-202 Method 106Very Fast-Acting (FF)02513.15Check
Catalog # Certificates
Sorting icon
0251.062 CSAicon
0251.125 CSAiconkcicon
0251.200 CSAiconkcicon
0251.250 CSAiconkcicon
0251.375 CSAiconkcicon
0251.500 CSAiconCCCiconkciconTUVicon
251_630
0251.750 CSAiconkciconTUVicon
0251001. CSAiconCCCiconMETIiconkciconTUVicon
0251002. CSAiconCCCiconMETIiconkciconTUVicon
0251003. CSAiconCCCiconMETIiconkciconTUVicon
0251004. CSAiconCCCiconMETIiconkciconTUVicon
0251005. CSAiconCCCiconMETIiconkciconTUVicon
0251007. CSAiconTUVicon
025101.5 CSAiconMETIiconkciconTUVicon
025101.6 CSAiconMETIiconkciconTUVicon
0251010. CSAiconTUVicon
0251012. CSAicon
0251015. CSAicon
025102.5 CSAiconCCCiconMETIiconkciconTUVicon
025103.5 CSAiconMETIiconkciconTUVicon
02511.25 CSAiconMETIiconkciconkciconTUVicon
02513.15 CSAiconMETIiconkciconTUVicon
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
0251.062PARL FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 Yes
06/12/2011
0251.062NAT1L FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 CoC_RoHS9_0251.062NAT1L REACH197_Declaration_with_Pb_0251.062NAT1L Yes
06/12/2011		 Contains IPC_0251.062NAT1L_0251.062MAT1L
0251.062NRT1L FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 CoC_RoHS9_0251.062NRT1L REACH209_Declaration_Contain-_0251.062NRT1L Yes
06/12/2011		 Contains IPC_0251.062NRT1L
0251.062NAT1HF FUSE 125V PICO FA RoHS HalogenFree .062A RoHS No 05/12/2004 PbFree No 07/12/2012 Yes
06/12/2011
0251.062MXL FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 CoC_RoHS9_0251.062MXL REACH219_Declaration_(Contain)_0251.062MXL Yes
06/12/2011		 Contains IPC_0251.062MXL
0251.062HAT1L FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 Yes
06/12/2011
0251.062PAT1L FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 Yes
06/12/2011
0251.062PAT1HF FUSE 125V PICO FA RoHS HalogenFree .062A RoHS No 05/12/2004 PbFree No 07/12/2012 Yes
06/12/2011
0251.062MAT1L FUSE 125V PICO II FA RoHS .062A RoHS No 05/12/2004 PbFree No 07/12/2012 CoC_RoHS9_0251.062MAT1L REACH197_Declaration_with_Pb_0251.062MAT1L Yes
06/12/2011		 Contains
0251.062MAT1HF FUSE 125V PICO FA RoHS HalogenFree .062A RoHS No 05/12/2004 PbFree No 07/12/2012 Yes
06/12/2011
0251.125NAT1L FUSE 125V PICO II FA RoHS .125A RoHS No 05/12/2004 PbFree No Yes
06/12/2011
0251.200PARL FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200MAT1L FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200MAT1HF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200PARHF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200NRT1HF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200NAT1L FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200PAT1HF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200PAT1L FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200NAT1HF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200MRT1HF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200MXL FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 CoC_RoHS9_0251.200MXL REACH209_Declaration_Contain-_0251.200MXL Yes
06/12/2011		 Contains
0251.200MRT1L FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200MXHF FUSE 125V PICO FA RoHS HalogenFree .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200NRT1L FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.200NAT6L FUSE 125V PICO II FA RoHS .200A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.250PARL FUSE 125V PICO II FA RoHS .250A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.250PAT1L FUSE 125V PICO II FA RoHS .250A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.250MXL FUSE 125V PICO II FA RoHS .250A RoHS No 05/12/2004 PbFree No 07/04/2012 REACH197_Declaration_with_Pb_0251.250MXL Yes
06/12/2011		 Contains IPC_0251.250MXL
0251.250NAT1HF FUSE 125V PICO FA RoHS HalogenFree .250A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.250PAT1HF FUSE 125V PICO FA RoHS HalogenFree .250A RoHS No 05/12/2004 PbFree No 07/04/2012 Yes
06/12/2011
0251.250NAT1L FUSE 125V PICO II FA RoHS .250A RoHS No 05/12/2004 PbFree No 07/04/2012