Microwave Engineering Corporation · Electronic Components
R91-3N
Coupler, Directional
Part NumberR91-3N
ManufacturerMicrowave Engineering Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-00-450-0908 (NSN)
Federal Item NameCOUPLER,DIRECTIONAL
Federal Supply Class5985 — Antennas and Waveguides
Terminal Fitting Controlling AgencWESTINGHOUSE ELECTRIC CORP
Overall Height1.500 INCHES NOMINAL
Unit TypeCOAXIAL LINE AND WAVEGUIDE
Design TypeBIDIRECTIONAL
Usage DesignMAIN LINE AND SECONDARY LINE TERMINAL FITTING
Overall Width5.250 INCHES NOMINAL
Power Loss In Decibels10.0
Overall Length10.940 INCHES MAXIMUM
Vendor Part Numbers990C090H01
Cancelled NSN5985-00-425-8111 (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 R91-3N available?
We can source R91-3N 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 R91-3N by Microwave Engineering Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If R91-3N 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 R91-3N?
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 R91-3N?
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.