Q-Tech Corp. · Electronic Components
MCM855-4B
Oscillator, Crystal Controlled
Part NumberMCM855-4B
ManufacturerQ-Tech Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-01-332-3500 (NSN)
Federal Item NameOSCILLATOR,CRYSTAL CONTROLLED
Federal Supply Class5955 — Crystals and Oscillators
Overall Width0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
Connection TypePIN LEFT SIDE
Operating Temp Range-55.0 TO 125.0 CELSIUS
Environmental ProtectionMOISTURE PROOF
Overall Length0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
Circuit Construction TypeSOLID STATE
Inclosure TypeHERMETICALLY SEALED
Average Life MeasurementNOT RATED
Storage Temp Range-65.0 TO 125.0 CELSIUS
Installation DesignMODULE
Control TypeREMOTE
Vendor Part NumbersH950063-004B
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 MCM855-4B available?
We can source MCM855-4B 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 MCM855-4B by Q-Tech Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MCM855-4B 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 MCM855-4B?
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 MCM855-4B?
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.