BAE Systems Information and Electronic Systems Integration · Electronic Components
666278-061
Crystal Unit, Quartz
Part Number666278-061
ManufacturerBAE Systems Information and Electronic Systems Integration
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-00-461-0432 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Body Width0.394 INCHES MINIMUM AND 0.401 INCHES MAXIMUM
Style DesignatorTUBE BODY, WIRE LEADS
Overall Length0.625 INCHES MINIMUM AND 0.666 INCHES MAXIMUM
Specified Frequency27.7291 MEGAHERTZ
Body Thickness0.142 INCHES MINIMUM AND 0.149 INCHES MAXIMUM
Equivalent Resistance Value In Ohm50.0 NOMINAL
Drive Level Rating2.0 MILLIWATTS NOMINAL AND 1.6 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM
Center To Center Distance Between0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM
Frequency Tolerance For Operating-0.005 TO 0.005 AND -0.0010 TO 0.0010
Mode Of OscillationFUNDAMENTAL
Terminal Diameter0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM
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 666278-061 available?
We can source 666278-061 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 666278-061 by BAE Systems Information and Electronic Systems Integration obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 666278-061 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 666278-061?
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 666278-061?
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.