International Business Machines Corp. Parts Order Center Dept E - 54 · Electronic Components
78999
Fuse, Cartridge
Part Number78999
ManufacturerInternational Business Machines Corp. Parts Order Center Dept E - 54
AvailabilityAvailable to order — request a quote
Specifications
NSN5920-00-431-4710 (NSN)
Federal Item NameFUSE,CARTRIDGE
Federal Supply Class5920 — Fuses and Lightning Arresters
Surface TreatmentNICKEL TERMINAL
Maximum Voltage Rating In Volts250.0 AC AND 250.0 DC
Features ProvidedNONRENEWABLE FUSIBLE ELEMENT
Overall Diameter0.250 INCHES NOMINAL
Continuous Current Rating In Amps0.500
Circuit Over Current InterruptionTIME DELAY
Interruption Indicator MethodVISIBLE ELEMENT
Overall Length1.250 INCHES NOMINAL
Vendor Part NumbersMDL-1/2A
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 78999 available?
We can source 78999 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 78999 by International Business Machines Corp. Parts Order Center Dept E - 54 obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 78999 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 78999?
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 78999?
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.