● 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
Ellis & Watts International  · Electronic Components

WU4-8

Circuit Breaker

Part NumberWU4-8
ManufacturerEllis & Watts International
AvailabilityAvailable to order — request a quote

Specifications

Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Operating Voltage Type And Rating28.0 DC SINGLE LOCATION28.0 DC SINGLE LOCATION
Maximum Continuous Load Current Ra5.0 AMPERES DC SINGLE LOCATION5.0 AMPERES DC SINGLE LOCATION
Ultimate Trip Rating Of Continuous125.0 SINGLE LOCATION125.0 SINGLE LOCATION
Circuit Protection TypeOVERCURRENT SINGLE LOCATIONOVERCURRENT SINGLE LOCATION
Main Contact Tripping Mechanism TyTRIP FREETRIP FREE
Trip Release CharacteristicTIME DELAY SINGLE LOCATIONTIME DELAY SINGLE LOCATION
Mounting Surface To Terminal End D2.500 INCHES NOMINAL2.500 INCHES NOMINAL
Mounting Facility Type And Quantit2 THREADED HOLE(S)2 THREADED HOLE(S)
Boss Height0.125 INCHES NOMINAL0.125 INCHES NOMINAL
Pole Quantity11
Distance Between Centerlines Of Mo1.812 INCHES NOMINAL1.812 INCHES NOMINAL
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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 WU4-8 available?
We can source WU4-8 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 WU4-8 by Ellis & Watts International obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If WU4-8 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 WU4-8?
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 WU4-8?
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.