L70S Series - 700 Vac/650 Vdc - Traditional High-Speed Fuse

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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.

Littelfuse L70S Series High-Speed Fuses are designed to protect today’s equipment and systems, and are manufactured with Littelfuse-developed technology that sets tomorrow’s standards for accuracy, consistent quality, reliability, and predictable performance.

Littelfuse engineers have redefined High-Speed Fuse technology by using advanced metallurgical, polymer, and materials research, mathematical modeling, and computerized statistical analysis.

Designed specifically for supplementary protection of semiconducting devices such as silicon controlled rectifiers (SCR’s), diodes, thyristors, triacs, transistors, and similar solid-state devices. These devices are used in power equipment including variable speed drives, power rectifiers, UPS systems, DC power supplies, and in a wide range of electronic equipment. May be used wherever extremely fast-acting, current-limiting fuses with no time delay are required.

  • AC: 200 kAIC
    DC: 20 kAIC — Reliable interruption of all overcurrents meets present and future system requirements.
  • Extremely Current Limiting — Low I2t and peak let-through currents meet most semiconductor requirements.
  • UL Recognized — High-speed fuses may be used to provide supplementary protection in UL listed equipment.
  • Low Watt Losses — Means less heating and power consumption in circuit.
  • Controlled Transient Overvoltages — All circuits are subject to transient overvoltages during fault current interruption. These transient overvoltages (arc voltages) start when fuse links melt or circuit breaker contacts part, and subside when circuit is interrupted. Semiconductors are very sensitive to overvoltages. Littelfuse high-speed fuse designs keep transient overvoltages to low levels and help reduce semiconductor failure.

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VAC (V)VDC (V)Interrupting RatingOpeningStockSamplesCompare
L70S0101070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0151570065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0202070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0252570065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0303070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0353570065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0404070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0505070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0606070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0707070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0808070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S0909070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S10010070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S12512570065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S15015070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S17517570065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S20020070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S22522570065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S25025070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S30030070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S35035070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S40040070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S45045070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S50050070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S60060070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S70070070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
L70S80080070065020 kA @ 650 VdcVery Fast-Acting (FF)CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
L70S010.T FUS 700V SEMICONDUCTOR 10A RoHS No 09/01/2006 PbFree No 09/01/2006 No
L70S015.T FUS 700V SEMICONDUCTOR 15A RoHS No 09/01/2006 PbFree No 09/01/2006 No
L70S020.T FUS 700V SEMICONDUCTOR 20A RoHS No 09/01/2006 PbFree No 09/01/2006 No
L70S025.T FUS 700V SEMICONDUCTOR 25A RoHS No 09/01/2006 PbFree No 09/01/2006 No
L70S030.T FUS 700V SEMICONDUCTOR 30A RoHS No 09/01/2006 PbFree No 09/01/2006 CoC_RoHS10_L70S030.T_11-11-2020 REACH209_Declaration_L70S030.T_11-11-2020
Does not Contain
L70S035.T FUS 700V SEMICONDUCTOR 35A RoHS No 09/01/2006 PbFree No No
L70S040.T FUS 700V SEMICONDUCTOR 40A RoHS No 09/01/2006 PbFree No No
L70S050.T FUS 700V SEMICONDUCTOR 50A RoHS No 09/01/2006 PbFree No No
L70S060.T FUS 700V SEMICONDUCTOR 60A RoHS No 09/01/2006 PbFree No No
L70S070.V FUS 700V SEMICONDUCTOR 70A RoHS No 09/01/2006 PbFree No No
L70S080.V FUS 700V SEMICONDUCTOR 80A RoHS No 09/01/2006 PbFree No No
L70S090.V FUS 700V SEMICONDUCTOR 90A RoHS No 09/01/2006 PbFree No No
L70S100.V FUS 700V SEMICONDUCTOR 100A RoHS No 09/01/2006 PbFree No No
L70S125.V FUS 700V SEMICONDUCTOR 125A RoHS No 09/01/2006 PbFree No No
L70S150.V FUS 700V SEMICONDUCTOR 150A RoHS No 09/01/2006 PbFree No CoC_RoHS9_L70S150.V_07-11-2017 No
L70S175.V FUS 700V SEMICONDUCTOR 175A RoHS No 09/01/2006 PbFree No No
L70S200.V FUS 700V SEMICONDUCTOR 200A RoHS No 09/01/2006 PbFree No CoC_RoHS9_L70S200.V_10-11-2019 REACH201_Declaration_with_Pb_L70S200.V_10-11-2019 No
L70S225.V FUS 700V SEMICONDUCTOR 225A RoHS No 09/01/2006 PbFree No No
L70S250.V FUS 700V SEMICONDUCTOR 250A RoHS No 09/01/2006 PbFree No No
L70S300.V FUS 700V SEMICONDUCTOR 300A RoHS No 09/01/2006 PbFree No CoC_RoHS9_L70S300.V_11-07-2019 REACH201_Declaration_with_Pb_L70S300.V_11-7-2019 No
L70S350.V FUS 700V SEMICONDUCTOR 350A RoHS No 09/01/2006 PbFree No No
L70S400.V FUS 700V SEMICONDUCTOR 400A RoHS No 09/01/2006 PbFree No No
L70S450.X FUS 700V SEMICONDUCTOR 450A RoHS No 09/01/2006 PbFree No CoC_RoHS9_L70S450.X_04-29-2020 No
L70S500.X FUS 700V SEMICONDUCTOR 500A RoHS No 09/01/2006 PbFree No No
L70S600.X FUS 700V SEMICONDUCTOR 600A RoHS No 09/01/2006 PbFree No No
L70S700.X FUS 700V SEMICONDUCTOR 700A RoHS No 09/01/2006 PbFree No No
L70S800.X FUS 700V SEMICONDUCTOR 800A RoHS No 09/01/2006 PbFree No No
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