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Avaya Inc.  · Electronic Components

645B

Power Supply

Part Number645B
ManufacturerAvaya Inc.
AvailabilityAvailable to order — request a quote

Specifications

Federal Item NamePOWER SUPPLY
Federal Supply Class6130 — Power Supplies and Converters (Nonrotating)
Input Voltage Rating-48.0 DC VOLTS NOMINAL SINGLE OPERATING POWER RQMT
Output Voltage Rating-5.0 DC VOLTS NOMINAL SECOND POWER OUTPUT
Vendor Part NumbersTN645B, 104439153
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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

Frequently asked

Is 645B available?
We can source 645B 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 645B by Avaya Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 645B 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 645B?
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 645B?
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.