Ross Engineering Corporation · Electronic Components
581R943H03
Relay, Electromagnetic
Part Number581R943H03
ManufacturerRoss Engineering Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-01-089-0656 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Overall Length7.680 INCHES NOMINAL
Terminal Type And Quantity11 TAB, SOLDER LUG CONTACTS
Main Contact Load Current Rating A40.0 AMPERES DC RESISTIVE LOAD
Main Contact Maximum Voltage Ratin30000.0 DC
Operating Voltage Rating And Type26.5 VOLTS DC 25 DEG CELSIUS ALL WINDINGS
Overall Height5.000 INCHES NOMINAL
Nonpile Up Main Contact Arrangemen4 POLE, DOUBLE THROW, TWO POSITIONS MOMENTARY
Auxiliary Contact Maximum Voltage28.0 DC
Auxiliary Contact Load Current Rat10.0 AMPERES DC RESISTIVE LOAD
Overall Width5.750 INCHES NOMINAL
Environmental ProtectionSHOCK RESISTANT AND VIBRATION RESISTANT
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 581R943H03 available?
We can source 581R943H03 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 581R943H03 by Ross Engineering Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 581R943H03 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 581R943H03?
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 581R943H03?
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.