Lucent Technologies Inc. Corporate Headquarters · Electronic Components
U520RELAY
Relay, Electromagnetic
Part NumberU520RELAY
ManufacturerLucent Technologies Inc. Corporate Headquarters
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-518-7103 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Duty TypeCONTINUOUS
Winding Quantity1
Overall Length4.530 INCHES NOMINAL
Pile Up Main Contact Form Arrangem2A2B
Center To Center Distance Between0.312 INCHES NOMINAL SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Overall Width1.430 INCHES NOMINAL
Operating Voltage Rating And Type15.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Winding Dc Resistance Rating950.0 OHMS NOMINAL SINGLE WINDING
Environmental ProtectionDUSTPROOF
Mounting Facility Type And Quantit2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Vendor Part NumbersU520
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 U520RELAY available?
We can source U520RELAY 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 U520RELAY by Lucent Technologies Inc. Corporate Headquarters obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If U520RELAY 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 U520RELAY?
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 U520RELAY?
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.