Keysight Technologies Inc. · Electronic Components
8491A-040
Attenuator, Fixed
Part Number8491A-040
ManufacturerKeysight Technologies Inc.
LifecycleStocked
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-00-938-8366 (NSN)
Federal Item NameATTENUATOR,FIXED
Federal Supply Class5985 — Antennas and Waveguides
Attenuation Accuracy In Decibels-1.50 TO 1.50
Application DesignTRANSMISSION LINE
Attenuation Accuracy Reference Fre4.0 GIGAHERTZ
Input Impedance Rating In Ohms50.0
Body StyleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
Overall Diameter0.813 INCHES NOMINAL
Rf Signal Attenuation In Decibels40.0
Output Impedance Rating In Ohms50.0
Power Rating2.0 WATTS AVERAGE AND 100.0 WATTS PEAK
Overall Length2.438 INCHES NOMINAL
Frequency Range0.000 HERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
RohscompliantNA
For Use WithKeysight RF & Microwave Test Equipment
Hazardousfalse
RohsphthalatescompliantTBA
Impedance-
Product Range-
IscanonicalY
Continuous Rf Input Power Max100 W
SvhcNo SVHC (17-Jan-2023)
Rf Test Component TypeAttenuator
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 8491A-040 available?
We can source 8491A-040 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 8491A-040 by Keysight Technologies Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 8491A-040 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 8491A-040?
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 8491A-040?
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.