Leach International · Electronic Components
637-40A
Relay, Electromagnetic
Part Number637-40A
ManufacturerLeach International
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-225-3964 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Main Contact Load Current Rating A8.0 AMPERES AC AND 10.0 AMPERES DC RESISTIVE LOAD
Coil Quantity1
Terminal Type And Quantity8 PIN ALL FUNCTIONS
Duty TypeCONTINUOUS
Main Contact Maximum Voltage Ratin115.0 AC AND 29.0 DC
Mounting Facility Type And Quantit1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY
Overall Diameter1.780 INCHES NOMINAL
Overall Length3.180 INCHES NOMINAL
Environmental ProtectionDUSTPROOF
Winding Quantity1
Vendor Part NumbersCP35-5-25A22
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 637-40A available?
We can source 637-40A 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 637-40A by Leach International obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 637-40A 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 637-40A?
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 637-40A?
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.