L50S Series - 500 Vac/450Vdc - 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 L50S 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
L50S0101050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0121250045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0151550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0202050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0252550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0303050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0353550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0404050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0505050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0606050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0707050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0808050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S0909050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S10010050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S12512550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S15015050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S17517550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S20020050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S22522550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S25025050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S27527550045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S30030050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S350350500450200000A@500VACVery Fast-Acting (FF)CheckOrder
L50S40040050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S45045050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S50050050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S55055050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S60060050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S70070050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
L50S80080050045020000A@450VDCVery Fast-Acting (FF)CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
L50S050.T FUS 500V SEIMCONDUCTOR 50A RoHS No 01/01/2007 PbFree No CoC_REACh174_L50S050.T_12-15-2017 No
L50S060.T FUS 500V SEIMCONDUCTOR 60A RoHS No 01/01/2007 PbFree No CoC_REACh174_L50S060.T_12-15-2017 No
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