Narda Holdings, Inc. · Electronic Components
SEM133D
Switch, Radio Frequency Transmiss
Part NumberSEM133D
ManufacturerNarda Holdings, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-01-394-9906 (NSN)
Federal Item NameSWITCH,RADIO FREQUENCY TRANSMISS
Federal Supply Class5985 — Antennas and Waveguides
Mounting Facility Type And Quantit4 UNTHREADED HOLE(S)
Switch TypeTRANSFER
Voltage Standing Wave Ratio1.20 SINGLE
Switch Return Mechanism TypeLATCHING
Frequency Rating18.0 GIGAHERTZ NOMINAL SINGLE FREQUENCY OPERATING
Actuator Operating MethodRELAY
Pole Quantity3
Overall Length2.700 INCHES NOMINAL
Body StyleCYLINDRICAL W/RECTANGULAR BASE
Overall Height1.750 INCHES NOMINAL
Overall Width1.750 INCHES NOMINAL
ESD/EMICode B — 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 SEM133D available?
We can source SEM133D 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 SEM133D by Narda Holdings, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SEM133D 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 SEM133D?
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 SEM133D?
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.