Eaton Corp. Opns & Technical Center · Electronic Components
643-340
Resistor Assembly
Part Number643-340
ManufacturerEaton Corp. Opns & Technical Center
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-501-6457 (NSN)
Federal Item NameRESISTOR ASSEMBLY
Federal Supply Class5905 — Resistors
Mounting ConfigurationFOUR 1/4 IN. SLOTS SPACED ON 11-3/16 IN. BY 13-3/16 IN. MTG CENTERS
Resistance Tolerance In Percent-10.0 TO 10.0
Resistor Power Dissipation Rating23.280 AND 11.290 AND 15.05
Component NameFIXED WIRE WOUND TYPE
Component Controlling AgencyCUTLET-HAMMER MFG CO
Electrical Resistance0.5 OHMS AND 0.33 OHMS AND 0.16 OHMS AND 0.12 OHMS
Assembly Construction MethodMOUNTED BETWEEN BRACKETS
Component Quantity9
Component RelationshipNOT MATCHED
Component Identifying Number1229-523A PART NO.
RohscompliantYES
Ip Rating-
Voltage Rating14 VDC
Hazardousfalse
RohsphthalatescompliantYES
No Of Contacts32 Contacts
Product RangeCMC 64334 Series
IscanonicalY
Automotive Contact TypeSolder Pin
SvhcNo SVHC (04-Feb-2026)
Contact MaterialBrass
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 643-340 available?
We can source 643-340 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 643-340 by Eaton Corp. Opns & Technical Center obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 643-340 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 643-340?
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 643-340?
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.