303 Series - Micro™/TR3; Subminiature Fuses

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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.

Features
  • Lead-free/RoHS Compliant
  • Reduced PCB space requirements
  • Direct solderable or plug-in versions
  • Internationally approved
  • Low internal resistance
  • Shocksafe casing
  • Vibration resistant

Access specifications, certifications, check availability and order parts below

Catalog #VDC (V)VAC (V)Resistance
(Ω)
Nominal Melting I2T (A2sec)MSLOpeningMax Operating Temp (°C)Min Operating TemperatureInterupt Voltage (V) -1Partner ECAD ModelsStockSamplesCompare
303005000011252.927E-05MIL-STD-202 Method 106Fast-Acting (F)70-2512530300500001CheckOrder
303005001311252.927E-05MIL-STD-202 Method 106Fast-Acting (F)70-2512530300500131CheckOrder
303005004211252.927E-05MIL-STD-202 Method 106Fast-Acting (F)70-2512530300500421CheckOrder
303006300011251.1990.00013MIL-STD-202 Method 106Fast-Acting (F)70-2512530300630001CheckOrder
303006301311251.1990.00013MIL-STD-202 Method 106Fast-Acting (F)70-2512530300630131CheckOrder
303006304211251.1990.00013MIL-STD-202 Method 106Fast-Acting (F)70-2512530300630421CheckOrder
303008000011252.230.0002MIL-STD-202 Method 106Fast-Acting (F)70-2512530300800001CheckOrder
303008001311252.230.0002MIL-STD-202 Method 106Fast-Acting (F)70-2512530300800131CheckOrder
303008004211252.230.0002MIL-STD-202 Method 106Fast-Acting (F)70-2512530300800421CheckOrder
303010000011254.380.0004MIL-STD-202 Method 106Fast-Acting (F)70-2512530301000001CheckOrder
303010001311254.380.0004MIL-STD-202 Method 106Fast-Acting (F)70-2512530301000131CheckOrder
303010004211254.380.0004MIL-STD-202 Method 106Fast-Acting (F)70-2512530301000421CheckOrder
303012500011253.4610.0022MIL-STD-202 Method 106Fast-Acting (F)70-2512530301250001CheckOrder
303012501311253.4610.0022MIL-STD-202 Method 106Fast-Acting (F)70-2512530301250131CheckOrder
303012504211253.4610.0022MIL-STD-202 Method 106Fast-Acting (F)70-2512530301250421CheckOrder
303016000011250.0029MIL-STD-202 Method 106Fast-Acting (F)70-2512530301600001CheckOrder
303016001311250.0029MIL-STD-202 Method 106Fast-Acting (F)70-2512530301600131CheckOrder
303016004211250.0029MIL-STD-202 Method 106Fast-Acting (F)70-2512530301600421CheckOrder
303020000011251.350.0042MIL-STD-202 Method 106Fast-Acting (F)70-2512530302000001CheckOrder
303020001311251.350.0042MIL-STD-202 Method 106Fast-Acting (F)70-2512530302000131CheckOrder
303020004211251.350.0042MIL-STD-202 Method 106Fast-Acting (F)70-2512530302000421CheckOrder
303025000011251.150.0082MIL-STD-202 Method 106Fast-Acting (F)70-2512530302500001CheckOrder
303025001311251.150.0082MIL-STD-202 Method 106Fast-Acting (F)70-2512530302500131CheckOrder
303025004211251.150.0082MIL-STD-202 Method 106Fast-Acting (F)70-2512530302500421CheckOrder
303031500011250.9650.015MIL-STD-202 Method 106Fast-Acting (F)70-2512530303150001CheckOrder
303031501311250.9650.015MIL-STD-202 Method 106Fast-Acting (F)70-2512530303150131CheckOrder
303031504211250.9650.015MIL-STD-202 Method 106Fast-Acting (F)70-2512530303150421CheckOrder
303040000011250.8050.025MIL-STD-202 Method 106Fast-Acting (F)70-2512530304000001CheckOrder
303040001311250.8050.025MIL-STD-202 Method 106Fast-Acting (F)70-2512530304000131CheckOrder
303040004211250.8050.025MIL-STD-202 Method 106Fast-Acting (F)70-2512530304000421CheckOrder
303050000011250.5320.042MIL-STD-202 Method 106Fast-Acting (F)70-2512530305000001CheckOrder
303050001311250.5320.042MIL-STD-202 Method 106Fast-Acting (F)70-2512530305000131CheckOrder
303050004211250.5320.042MIL-STD-202 Method 106Fast-Acting (F)70-2512530305000421CheckOrder
303063000011250.14480.015MIL-STD-202 Method 106Fast-Acting (F)70-2512530306300001CheckOrder
303063001311250.14480.015MIL-STD-202 Method 106Fast-Acting (F)70-2512530306300131CheckOrder
303063004211250.14480.015MIL-STD-202 Method 106Fast-Acting (F)70-2512530306300421CheckOrder
303080000011250.025MIL-STD-202 Method 106Fast-Acting (F)70-256330308000001CheckOrder
303080001311250.025MIL-STD-202 Method 106Fast-Acting (F)70-256330308000131CheckOrder
303080004211250.025MIL-STD-202 Method 106Fast-Acting (F)70-256330308000421CheckOrder
303110000011250.083450.039MIL-STD-202 Method 106Fast-Acting (F)70-256330311000001CheckOrder
303110001311250.083450.039MIL-STD-202 Method 106Fast-Acting (F)70-256330311000131CheckOrder
303110004211250.083450.039MIL-STD-202 Method 106Fast-Acting (F)70-256330311000421CheckOrder
303112500011250.059MIL-STD-202 Method 106Fast-Acting (F)70-256330311250001CheckOrder
303112501311250.059MIL-STD-202 Method 106Fast-Acting (F)70-256330311250131CheckOrder
303112504211250.059MIL-STD-202 Method 106Fast-Acting (F)70-256330311250421CheckOrder
303116000011250.0520.11MIL-STD-202 Method 106Fast-Acting (F)70-256330311600001CheckOrder
303116001311250.0520.11MIL-STD-202 Method 106Fast-Acting (F)70-256330311600131CheckOrder
303116004211250.0520.11MIL-STD-202 Method 106Fast-Acting (F)70-256330311600421CheckOrder
303120000011250.040.17MIL-STD-202 Method 106Fast-Acting (F)70-256330312000001CheckOrder
303120001311250.040.17MIL-STD-202 Method 106Fast-Acting (F)70-256330312000131CheckOrder
303120004211250.040.17MIL-STD-202 Method 106Fast-Acting (F)70-256330312000421CheckOrder
303125000011250.23MIL-STD-202 Method 106Fast-Acting (F)70-256330312500001CheckOrder
303125001311250.23MIL-STD-202 Method 106Fast-Acting (F)70-256330312500131CheckOrder
303125004211250.23MIL-STD-202 Method 106Fast-Acting (F)70-256330312500421CheckOrder
303131500011250.45MIL-STD-202 Method 106Fast-Acting (F)70-256330313150001CheckOrder
303131501311250.45MIL-STD-202 Method 106Fast-Acting (F)70-256330313150131CheckOrder
303131504211250.45MIL-STD-202 Method 106Fast-Acting (F)70-256330313150421CheckOrder
303140000011251MIL-STD-202 Method 106Fast-Acting (F)70-256330314000001CheckOrder
303140001311251MIL-STD-202 Method 106Fast-Acting (F)70-256330314000131CheckOrder
303140004211251MIL-STD-202 Method 106Fast-Acting (F)70-256330314000421CheckOrder
303150000011250.01311.5MIL-STD-202 Method 106Fast-Acting (F)70-256330315000001CheckOrder
303150001311250.01311.5MIL-STD-202 Method 106Fast-Acting (F)70-256330315000131CheckOrder
303150004211250.01311.5MIL-STD-202 Method 106Fast-Acting (F)70-256330315000421CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
30300500001 FUSE 125V FA TR3 LL AMMO .050A RoHS No PbFree No No
04/20/2007
30300500131 FUSE 125V FA TR3 LL .050A RoHS No PbFree No No
04/20/2007
30300500421 FUSE 125V FA TR3 SL .050A RoHS No PbFree No No
04/20/2007
30300630001 FUSE 125V FA TR3 LL AMMO .063A RoHS No PbFree No No
04/20/2007
30300630131 FUSE 125V FA TR3 LL .063A RoHS No PbFree No No
04/20/2007
30300630421 FUSE 125V FA TR3 SL .063A RoHS No PbFree No No
04/20/2007
30300800001 FUSE 125V FA TR3 LL AMMO .080A RoHS No PbFree No CoC_RoHS10_30300800001 REACH191_Declaration_30300800001 No
04/20/2007
Does not Contain
30300800131 FUSE 125V FA TR3 LL .080A RoHS No PbFree No CoC_RoHS10_30300800131 REACH191_Declaration_30300800131 No
04/20/2007
Does not Contain
30300800421 FUSE 125V FA TR3 SL .080A RoHS No PbFree No CoC_RoHS10_30300800421 REACH191_Declaration_30300800421 No
04/20/2007
Does not Contain
30301000001 FUSE 125V FA TR3 LL AMMO .100A RoHS No PbFree No No
04/20/2007
30301000131 FUSE 125V FA TR3 LL .100A RoHS No PbFree No CoC_RoHS10_30301000131 REACH209_Declaration_30301000131 No
04/20/2007
Does not Contain
30301000421 FUSE 125V FA TR3 SL .100A RoHS No PbFree No No
04/20/2007
30301250001 FUSE 125V FA TR3 LL AMMO .125A RoHS No PbFree No No
04/20/2007
30301250131 FUSE 125V FA TR3 LL .125A RoHS No PbFree No No
04/20/2007
30301250421 FUSE 125V FA TR3 SL .125A RoHS No PbFree No No
04/20/2007
30301600001 FUSE 125V FA TR3 LL AMMO .160A RoHS No PbFree No No
04/20/2007
30301600131 FUSE 125V FA TR3 LL .160A RoHS No PbFree No No
04/20/2007
30301600421 FUSE 125V FA TR3 SL .160A RoHS No PbFree No No
04/20/2007
30302000001 FUSE 125V FA TR3 LL AMMO .200A RoHS No PbFree No No
04/20/2007
30302000131 FUSE 125V FA TR3 LL .200A RoHS No PbFree No No
04/20/2007
30302000421 FUSE 125V FA TR3 SL .200A RoHS No PbFree No REACH_SVHC Declaration_30302000421 No
04/20/2007
Does not Contain IPC_30302000421
30302500001 FUSE 125V FA TR3 LL AMMO .250A RoHS No PbFree No No
04/20/2007
30302500131 FUSE 125V FA TR3 LL .250A RoHS No PbFree No No
04/20/2007
30302500421 FUSE 125V FA TR3 SL .250A RoHS No PbFree No No
04/20/2007
30303150001 FUSE 125V FA TR3 LL AMMO .315A RoHS No PbFree No No
04/20/2007
30303150131 FUSE 125V FA TR3 LL .315A RoHS No PbFree No No
04/20/2007
30303150421 FUSE 125V FA TR3 SL .315A RoHS No PbFree No No
04/20/2007
30304000001 FUSE 125V FA TR3 LL AMMO .400A RoHS No PbFree No No
04/20/2007
30304000131 FUSE 125V FA TR3 LL .400A RoHS No PbFree No No
04/20/2007
30304000421 FUSE 125V FA TR3 SL .400A RoHS No PbFree No No
04/20/2007
30305000001 FUSE 125V FA TR3 LL AMMO .500A RoHS No PbFree No No
04/20/2007
30305000131 FUSE 125V FA TR3 LL .500A RoHS No PbFree No No
04/20/2007
30305000421 FUSE 125V FA TR3 SL .500A RoHS No PbFree No CoC_RoHS10_30305000421 No
04/20/2007
30306300001 FUSE 125V FA TR3 LL AMMO .630A RoHS No PbFree No No
04/20/2007
30306300131 FUSE 125V FA TR3 LL .630A RoHS No PbFree No No
04/20/2007
30306300421 FUSE 125V FA TR3 SL .630A RoHS No PbFree No No
04/20/2007
30308000001 FUSE 125V FA TR3 LL AMMO .800A RoHS No PbFree No No
04/20/2007
30308000131 FUSE 125V FA TR3 LL .800A RoHS No PbFree No No
04/20/2007
30308000421 FUSE 125V FA TR3 SL .800A RoHS No PbFree No No
04/20/2007
30311000001 FUSE 125V FA TR3 LL AMMO 1A RoHS No PbFree No No
04/20/2007
30311000131 FUSE 125V FA TR3 LL 1A RoHS No PbFree No No
04/20/2007
30311000421 FUSE 125V FA TR3 SL 1A RoHS No PbFree No No
04/20/2007
30311250001 FUSE 125V FA TR3 LL AMMO 1.25A RoHS No PbFree No No
04/20/2007
30311250131 FUSE 125V FA TR3 LL 1.25A RoHS No PbFree No No
04/20/2007
30311250421 FUSE 125V FA TR3 SL 1.25A RoHS No PbFree No No
04/20/2007
30311600001 FUSE 125V FA TR3 LL AMMO 1.6A RoHS No PbFree No No
04/20/2007
30311600131 FUSE 125V FA TR3 LL 1.6A RoHS No PbFree No No
04/20/2007
30311600421 FUSE 125V FA TR3 SL 1.6A RoHS No PbFree No No
04/20/2007
30312000001 FUSE 125V FA TR3 LL AMMO 2A RoHS No PbFree No No
04/20/2007
30312000131 FUSE 125V FA TR3 LL 2A RoHS No PbFree No No
04/20/2007
30312000421 FUSE 125V FA TR3 SL 2A RoHS No PbFree No CoC_RoHS10_30312000421 REACH219_Declaration_30312000421 No
04/20/2007
Does not Contain
30312500001 FUSE 125V FA TR3 LL AMMO 2.5A RoHS No PbFree No No
04/20/2007
30312500131 FUSE 125V FA TR3 LL 2.5A RoHS No PbFree No No
04/20/2007
30312500421 FUSE 125V FA TR3 SL 2.5A RoHS No PbFree No No
04/20/2007
30313150001 FUSE 125V FA TR3 LL AMMO 3.15A RoHS No PbFree No No
04/20/2007
30313150131 FUSE 125V FA TR3 LL 3.15A RoHS No PbFree No No
04/20/2007
30313150421 FUSE 125V FA TR3 SL 3.15A RoHS No PbFree No No
04/20/2007
30314000001 FUSE 125V FA TR3 LL AMMO 4A RoHS No PbFree No No
04/20/2007
30314000131 FUSE 125V FA TR3 LL 4A RoHS No PbFree No No
04/20/2007
30314000421 FUSE 125V FA TR3 SL 4A RoHS No PbFree No No
04/20/2007
30315000001 FUSE 125V FA TR3 LL AMMO 5A RoHS No PbFree No No
04/20/2007
30315000131 FUSE 125V FA TR3 LL 5A RoHS No PbFree No No
04/20/2007
30315000421 FUSE 125V FA TR3 SL 5A RoHS No PbFree No No
04/20/2007
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