L50S Series - 500 Vac/450Vdc - Traditional High-Speed Fuse

l50s fuses
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

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