Lucent Technologies Inc. Corporate Headquarters · Electronic Components
G637858-18
Crystal Unit, Quartz
Part NumberG637858-18
ManufacturerLucent Technologies Inc. Corporate Headquarters
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-01-132-1405 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Circuit ResonanceSERIES RESONANCE
Specified Frequency291.200 KILOHERTZ
Terminal Diameter0.019 INCHES NOMINAL
Drive Level Rating100.0 MICROAMPERES MINIMUM AND 150.0 MICROAMPERES MAXIMUM
Second Center To Center Distance B0.200 INCHES NOMINAL
Style DesignatorHAT TYPE, 5 WIRE LEADS
Equivalent Resistance Value In Ohm10.0 MINIMUM AND 130.0 MAXIMUM
Center To Center Distance Between0.200 INCHES NOMINAL
Frequency Tolerance For Operating-0.010 TO 0.010
Mode Of OscillationFUNDAMENTAL
Overall Length1.550 INCHES MAXIMUM
Vendor Part NumbersGA54078L18
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 G637858-18 available?
We can source G637858-18 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 G637858-18 by Lucent Technologies Inc. Corporate Headquarters obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If G637858-18 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 G637858-18?
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 G637858-18?
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.