Keysight Technologies Inc. · Electronic Components
0490-0478
Relay, Resonant Reed
Part Number0490-0478
ManufacturerKeysight Technologies Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-927-1759 (NSN)
Federal Item NameRELAY,RESONANT REED
Federal Supply Class5945 — Relays and Solenoids
Resonant Reed Quantity1
Environmental ProtectionHERMETIC
Duty TypeCONTINUOUS
Mounting Facility Type And Quantit1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY
Terminal Type And Quantity4 PIN ALL FUNCTIONS
Winding Dc Resistance Rating2.5 KILOHMS NOMINAL SINGLE WINDING
Main Contact Maximum Voltage Ratin500.0 DC
Resonant Reed Frequency In Hertz400.0 SINGLE REED
Overall Width0.760 INCHES NOMINAL
Coil Quantity1
Criticality Code JustificationFEAT
Vendor Part Numbers0490-0195
Cancelled NSN5945-00-990-0205 (cancelled)
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 0490-0478 available?
We can source 0490-0478 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 0490-0478 by Keysight Technologies Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 0490-0478 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 0490-0478?
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 0490-0478?
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.