● ISO 9001:2015 · ANSI/ESD S20.20-2021 · ERAI Member · GIDEP · Woman-Owned Small Business 760.724.2800 · 855.RH.HAS.IT · info@rhelectronics.com
Littelfuse, Inc.  · Electronic Components

U23

Fuse, Cartridge

Part NumberU23
ManufacturerLittelfuse, Inc.
AvailabilityAvailable to order — request a quote

Specifications

Federal Item NameFUSE,CARTRIDGE
Federal Supply Class5920 — Fuses and Lightning Arresters
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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

Frequently asked

Is U23 available?
We can source U23 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 U23 by Littelfuse, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If U23 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 U23?
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 U23?
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.