Thomas & Betts · Electronic Components
U520
RELAY,ELECTROMAGNETIC — NSN 5945-00-518-7103
Part NumberU520
ManufacturerThomas & Betts
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-518-7103 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Terminals10 PIN ALL FUNCTIONS
Overall Length4.530 INCHES NOMINAL
Overall Width1.430 INCHES NOMINAL
Overall Height1.250 INCHES NOMINAL
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY
Duty TypeCONTINUOUS
Winding Quantity1
Pile Up Main Contact Form Arrangem2A2B
Center To Center Distance Between0.312 INCHES NOMINAL SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Federal Supply Class5945 — Relays And Solenoids
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 U520 available?
We can source U520 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 U520 by Thomas & Betts obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If U520 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 U520?
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 U520?
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.