Bliley Technologies Inc. · Electronic Components
B621-4
Crystal Unit, Quartz
Part NumberB621-4
ManufacturerBliley Technologies Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-00-840-3691 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Specified Frequency752.200 KILOHERTZ
Style DesignatorOVAL BODY, PIN TERMINALS
Overall Length2.147 INCHES NOMINAL
Operating Temp Range-30.0 TO 70.0 CELSIUS
Center To Center Distance Between0.486 INCHES NOMINAL
Drive Level Rating2.0 MILLIWATTS NOMINAL
Overall Width0.757 INCHES NOMINAL
Body Length0.767 INCHES NOMINAL
Load Capacitance In Picofarads7.0 MAXIMUM
Equivalent Resistance Value In Ohm1500.0 NOMINAL
Mode Of OscillationFUNDAMENTAL
Vendor Part Numbers712730-26
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 B621-4 available?
We can source B621-4 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 B621-4 by Bliley Technologies Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If B621-4 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 B621-4?
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 B621-4?
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.