Telephone Company Of America Incorporated · Electronic Components
A40183
Relay, Electromagnetic
Part NumberA40183
ManufacturerTelephone Company Of America Incorporated
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-251-7390 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Winding Dc Resistance Rating2.0 KILOHMS NOMINAL SECOND WINDING
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY
Nominal Operating Current Rating A21.5 MILLIAMPERES DC ALL WINDINGS
Coil Quantity1
Overall Height0.960 INCHES NOMINAL
Center To Center Distance Between0.312 INCHES NOMINAL SINGLE MOUNTING FACILITY
Pile Up Main Contact Form Arrangem2C AND 1A
Main Contact Maximum Voltage Ratin50.0 DC
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Operating Voltage Rating And Type48.0 VOLTS DC 25 DEG CELSIUS ALL WINDINGS
Overall Width1.370 INCHES NOMINAL
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 A40183 available?
We can source A40183 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 A40183 by Telephone Company Of America Incorporated obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A40183 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 A40183?
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 A40183?
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.