Frequency Selective Networks · Electronic Components
A-490-4
Delay Line — Miscellaneous Electrical Components
Part NumberA-490-4
ManufacturerFrequency Selective Networks
AvailabilityAvailable to order — request a quote
Specifications
NSN5999-01-201-0406 (NSN)
Federal Item NameDELAY LINE
Federal Supply Class5999 — Miscellaneous Electrical Components
Section Delay Time44.800 MILLISECONDS NOMINAL ALL SECTIONS
Attenuation In Decibels32.000
Individual Section Quantity9
Body Width1.500 INCHES NOMINAL
Operating Temp Range+0.0 TO 60.0 CELSIUS
Frequency Rating1.800 KILOHERTZ MINIMUM AND 7.400 KILOHERTZ MAXIMUM
Mounting Facility Quantity4
Body Depth3.880 INCHES NOMINAL
Output Impedance Rating500.000 OHMS
Body StyleRECTANGULAR, FRONT CONNECTION
Mounting FacilityTHREADED INSERT
Vendor Part Numbers1207929-4
ESD/EMICode A — ESD/EMI sensitive item
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 A-490-4 available?
We can source A-490-4 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 A-490-4 by Frequency Selective Networks obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A-490-4 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 A-490-4?
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 A-490-4?
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.