L25S Series - Traditional Semiconductor Fuse

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Designed to protect today’s equipment and systems, Littelfuse semiconductor fuses are manufactured with Littelfuse-developed technology that sets tomorrow’s standards for accuracy, consistent quality, reliability, and predictable performance. By using advanced metallurgical, polymer, and materials research; mathematical modeling, and computerized statistical analysis; Littelfuse engineers have redefined “State-of-the-Art.”

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
  • 200,000 A.I.R. — Reliable interruption of all overcurrents up to 200,000 amperes . . . meets present and future system requirements. (Note: L15S series has 100,000 A.I.R.)
  • Extremely Current Limiting — Low I2t and peak let-through currents meet most semiconductor requirements.UL Recognized — Littelfuse semiconductor fuses are recognized under the components program of Underwriters Laboratories, Inc., and carry the mark. UL Recognized semiconductor 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 semiconductor 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
L25S001125025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S002225025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S003325025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S004425025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S005525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S006625025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S008825025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0101025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0121225025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0151525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0202025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0252525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0303025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0353525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0404025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0454525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0505025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0606025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0707025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0808025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S0909025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S10010025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S12512525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S15015025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S17517525025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S20020025025020 kA @ 250 VdcVery Fast-Acting (FF)CheckOrder
L25S200V250Very Fast-Acting (FF)CheckOrder
L25S22522525020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S25025025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S27527525020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S30030025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S35035025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S40040025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S45045025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S50050025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S500KTA250Very Fast-Acting (FF)Check
L25S60060025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S70070025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S80080025020020 kA @ 200 VdcVery Fast-Acting (FF)CheckOrder
L25S800KTA250Very Fast-Acting (FF)Check
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
L25S001.T FUS 250V SEMICONDUCTOR 1A RoHS No 01/01/2007 PbFree No No
L25S002.T FUS 250V SEMICONDUCTOR 2A RoHS No 01/01/2007 PbFree No No
L25S003.T FUS 250V SEMICONDUCTOR 3A RoHS No 01/01/2007 PbFree No No
L25S004.T FUS 250V SEMICONDUCTOR 4A RoHS No 01/01/2007 PbFree No No
L25S005.T FUS 250V SEMICONDUCTOR 5A RoHS No 01/01/2007 PbFree No No
L25S006.T FUS 250V SEMICONDUCTOR 6A RoHS No 01/01/2007 PbFree No No
L25S008.T FUS 250V SEMICONDUCTOR 8A RoHS No 01/01/2007 PbFree No No
L25S010.T FUS 250V SEMICONDUCTOR 10A RoHS No 01/01/2007 PbFree No No
L25S012.T FUS 250V SEMICONDUCTOR 12A RoHS No 01/01/2007 PbFree No No
L25S015.T FUS 250V SEMICONDUCTOR 15A RoHS No 01/01/2007 PbFree No No
L25S020.T FUS 250V SEMICONDUCTOR 20A RoHS No 01/01/2007 PbFree No No
L25S025.T FUS 250V SEMICONDUCTOR 25A RoHS No 01/01/2007 PbFree No No
L25S030.T FUS 250V SEMICONDUCTOR 30A RoHS No 01/01/2007 PbFree No CoC_RoHS10_L25S030.T_5-16-2018 No
L25S035.T FUS 250V SEMICONDUCTOR 35A RoHS No 01/01/2007 PbFree No CoC_RoHS10_L25S035.T_5-15-2018 No
L25S040.T FUS 250V SEMICONDUCTOR 40A RoHS No 01/01/2007 PbFree No No
L25S045.T FUS 250V SEMICONDUCTOR 45A RoHS No 01/01/2007 PbFree No No
L25S050.T FUS 250V SEMICONDUCTOR 50A RoHS No 01/01/2007 PbFree No No
L25S060.T FUS 250V SEMICONDUCTOR 60A RoHS No 01/01/2007 PbFree No CoC_RoHS10_L25S060.T_11-26-2020 REACH209_Declaration_L25S060.T_11-26-2020 No
Does not Contain
L25S070.V FUS 250V SEMICONDUCTOR 70A RoHS No 01/01/2007 PbFree No No
L25S080.V FUS 250V SEMICONDUCTOR 80A RoHS No 01/01/2007 PbFree No No
L25S090.V FUS 250V SEMICONDUCTOR 90A RoHS No 01/01/2007 PbFree No No
L25S100.V FUS 250V SEMICONDUCTOR 100A RoHS No 01/01/2007 PbFree No No
L25S125.V FUS 250V SEMICONDUCTOR 125A RoHS No 01/01/2007 PbFree No No
L25S150.V FUS 250V SEMICONDUCTOR 150A RoHS No 01/01/2007 PbFree No No
L25S175.V FUS 250V SEMICONDUCTOR 175A RoHS No 01/01/2007 PbFree No No
L25S200.V FUS 250V SEMICONDUCTOR 200A RoHS No 01/01/2007 PbFree No No
L25S225.V FUS 250V SEMICONDUCTOR 225A RoHS No 01/01/2007 PbFree No No
L25S250.V FUS 250V SEMICONDUCTOR 250A RoHS No 01/01/2007 PbFree No No
L25S275.V FUS 250V SEMICONDUCTOR 275A RoHS No 01/01/2007 PbFree No No
L25S300.V FUS 250V SEMICONDUCTOR 300A RoHS No 01/01/2007 PbFree No No
L25S350.V FUS 250V SEMICONDUCTOR 350A RoHS No 01/01/2007 PbFree No No
L25S400.V FUS 250V SEMICONDUCTOR 400A RoHS No 01/01/2007 PbFree No No
L25S450.V FUS 250V SEMICONDUCTOR 450A RoHS No 01/01/2007 PbFree No No
L25S500.V FUS 250V SEMICONDUCTOR 500A RoHS No 01/01/2007 PbFree No No
L25S600.V FUS 250V SEMICONDUCTOR 600A RoHS No 01/01/2007 PbFree No CoC_RoHS9_L25S600.V_10-19-2020 REACH209_Declaration_-Contain-_L25S600.V_10-19-2020 No
Contains
L25S700.V FUS 250V SEMICONDUCTOR 700A RoHS No 01/01/2007 PbFree No No
L25S800.V FUS 250V SEMICONDUCTOR 800A RoHS No 01/01/2007 PbFree No No
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