Standard Motor Products · Electronic Components
SR109
Relay, Electromagnetic
Part NumberSR109
ManufacturerStandard Motor Products
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-441-3957 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Overall Width2.250 INCHES NOMINAL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Nominal Thread Size0.312 INCHES SINGLE MOUNTING FACILITY
Main Contact Maximum Voltage Ratin12.0 DC
Thread Class2A SINGLE MOUNTING FACILITY
Terminal Type And Quantity2 SCREW CONTACTS
Minimum Differential Electrical Op12.0 MILLIAMPERES
Overall Length4.500 INCHES NOMINAL
Overall Height2.125 INCHES NOMINAL
Duty TypeINTERMITTENT
Mounting Facility Type And Quantit1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
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 SR109 available?
We can source SR109 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 SR109 by Standard Motor Products obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SR109 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 SR109?
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 SR109?
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.