Littelfuse, Inc. · Electronic Components
251-500
Fuse, Cartridge
Part Number251-500
ManufacturerLittelfuse, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5920-01-244-4238 (NSN)
Federal Item NameFUSE,CARTRIDGE
Federal Supply Class5920 — Fuses and Lightning Arresters
Overall Length0.281 INCHES NOMINAL
Terminal Length1.500 INCHES NOMINAL
Terminal Diameter0.031 INCHES NOMINAL
Maximum Voltage Rating In Volts125.0 AC
Continuous Current Rating In Amps0.500
Circuit Over Current InterruptionNORMAL INSTANTANEOUS
Overall Diameter0.094 INCHES NOMINAL
Body StylePIGTAIL TYPE
Interruption Indicator MethodCERAMIC SHELL BREAKS
Features ProvidedNONRENEWABLE FUSIBLE ELEMENT
Vendor Part Numbers40-615-709-05
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is 251-500 available?
We can source 251-500 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is 251-500 by Littelfuse, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 251-500 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like 251-500?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for 251-500?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.