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.

Applications
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.

Safety
  • 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.
Safety
  • 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
L50S0101050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0121250045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0151550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0202050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0252550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0303050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0353550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0404050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0505050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0606050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0707050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0808050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S0909050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S10010050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S12512550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S15015050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S17517550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S20020050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S22522550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S25025050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S27527550045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S30030050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S350350500450200 kA @ 500 VacVery Fast-Acting (FF)CheckOrder
L50S40040050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S45045050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S50050050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S55055050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S60060050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S70070050045020 kA @ 450 VdcVery Fast-Acting (FF)CheckOrder
L50S80080050045020 kA @ 450 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)
L50S010.T FUS 500V SEMICONDUCTOR 10A RoHS No 01/01/2007 PbFree No No
L50S012.T FUS 500V SEMICONDUCTOR 12A RoHS No 01/01/2007 PbFree No No
L50S015.T FUS 500V SEMICONDUCTOR 15A RoHS No 01/01/2007 PbFree No No
L50S020.T FUS 500V SEMICONDUCTOR 20A RoHS No 01/01/2007 PbFree No No
L50S025.T FUS 500V SEMICONDUCTOR 25A RoHS No 01/01/2007 PbFree No No
L50S030.T FUS 500V SEMICONDUCTOR 30A RoHS No 01/01/2007 PbFree No No
L50S035.T FUS 500V SEMICONDUCTOR 35A RoHS No 01/01/2007 PbFree No No
L50S040.T FUS 500V SEMICONDUCTOR 40A RoHS No 01/01/2007 PbFree No No
L50S050.T FUS 500V SEMICONDUCTOR 50A RoHS No 01/01/2007 PbFree No CoC_REACh174_L50S050.T_12-15-2017 No
L50S060.T FUS 500V SEMICONDUCTOR 60A RoHS No 01/01/2007 PbFree No CoC_REACh174_L50S060.T_12-15-2017 No
L50S070.T FUS 500V SEMICONDUCTOR 70A RoHS No 01/01/2007 PbFree No No
L50S080.T FUS 500V SEMICONDUCTOR 80A RoHS No 01/01/2007 PbFree No No
L50S090.T FUS 500V SEMICONDUCTOR 90A RoHS No 01/01/2007 PbFree No No
L50S100.T FUS 500V SEMICONDUCTOR 100A RoHS No 01/01/2007 PbFree No No
L50S125.V FUS 500V SEMICONDUCTOR 125A RoHS No 01/01/2007 PbFree No No
L50S150.V FUS 500V SEMICONDUCTOR 150A RoHS No 01/01/2007 PbFree No No
L50S175.V FUS 500V SEMICONDUCTOR 175A RoHS No 01/01/2007 PbFree No No
L50S200.V FUS 500V SEMICONDUCTOR 200A RoHS No 01/01/2007 PbFree No No
L50S225.V FUS 500V SEMICONDUCTOR 225A RoHS No 01/01/2007 PbFree No No
L50S250.V FUS 500V SEMICONDUCTOR 250A RoHS No 01/01/2007 PbFree No No
L50S275.V FUS 500V SEMICONDUCTOR 275A RoHS No 01/01/2007 PbFree No No
L50S300.V FUS 500V SEMICONDUCTOR 300A RoHS No 01/01/2007 PbFree No No
L50S350.V FUS 500V SEMICONDUCTOR 350A RoHS No 01/01/2007 PbFree No No
L50S400.V FUS 500V SEMICONDUCTOR 400A RoHS No 01/01/2007 PbFree No No
L50S450.X FUS 500V SEMICONDUCTOR 450A RoHS No 01/01/2007 PbFree No No
L50S500.X FUS 500V SEMICONDUCTOR 500A RoHS No 01/01/2007 PbFree No No
L50S550.X FUS 500V SEMICONDUCTOR 550A RoHS No 01/01/2007 PbFree No No
L50S600.X FUS 500V SEMICONDUCTOR 600A RoHS No 01/01/2007 PbFree No No
L50S700.X FUS 500V SEMICONDUCTOR 700A RoHS No 01/01/2007 PbFree No No
L50S800.X FUS 500V SEMICONDUCTOR 800A RoHS No 01/01/2007 PbFree No No
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