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

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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.

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
L70S0101070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0151570065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0202070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0252570065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0303070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0353570065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0404070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0505070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0606070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0707070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0808070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S0909070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S10010070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S12512570065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S15015070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S17517570065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S20020070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S22522570065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S25025070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S30030070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S35035070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S40040070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S45045070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S50050070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S60060070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S70070070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
L70S80080070065020000A@650VDCVery Fast-Acting (FF)CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
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
L70S150.V FUS 700V SEMICONDUCTOR 150A RoHS No 09/01/2006 PbFree No No
L70S200.V FUS 700V SEMICONDUCTOR 200A RoHS No 09/01/2006 PbFree No No
L70S300.V FUS 700V SEMICONDUCTOR 300A RoHS No 09/01/2006 PbFree No No
L70S450.X FUS 700V SEMICONDUCTOR 450A RoHS No 09/01/2006 PbFree No No
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