Essex Electro Engineers · Electronic Components
A645-1300
Voltmeter — Test Instruments
Part NumberA645-1300
ManufacturerEssex Electro Engineers
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-01-045-4644 (NSN)
Federal Item NameVOLTMETER
Federal Supply Class6625 — Test Instruments
Movement Suspension MethodJEWEL PIVOT BASE
Scale Division Quantity100 SINGLE INDICATOR SINGLE RANGE
Power SourceEXTERNAL
Circuit Attachment Method And Quan2 THREADED STUD
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Mounting Hole Diameter0.019 INCHES NOMINAL
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL
Accuracy In Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Installation DesignPANEL
Overall Diameter3.500 INCHES NOMINAL
Mounting Arrangement StyleTHREE HOLE/STUD BOLT CIRCLE
Vendor Part NumbersMK777-124
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 A645-1300 available?
We can source A645-1300 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 A645-1300 by Essex Electro Engineers obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A645-1300 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 A645-1300?
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 A645-1300?
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.