Northrop Grumman Systems Corporation · Electronic Components
3128-42
Relay, Electromagnetic
Part Number3128-42
ManufacturerNorthrop Grumman Systems Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-784-3784 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Duty TypeCONTINUOUS
Terminal Type And Quantity4 PIN ALL FUNCTIONS
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY
Thread Class2A SINGLE MOUNTING FACILITY
Mounting Facility Type And Quantit3 THREADED STUD(S) SINGLE MOUNTING FACILITY
Overall Height1.500 INCHES NOMINAL
Operating Voltage Rating And Type220.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Main Contact Load Current Rating A3.0 AMPERES DC RESISTIVE LOAD
Nominal Operating Current Rating A20.0 MILLIAMPERES DC SINGLE WINDING
Mounting Facility PatternTRIANGLE SINGLE MOUNTING FACILITY
Coil Quantity1
RohscompliantYES
Voltage Rating520 VAC
Filter Output TerminalsTerminal Block
Hazardousfalse
RohsphthalatescompliantYES
Product RangeFMBD EP Series
IscanonicalY
SvhcLead
No Of Stages2 Stage
ProducttraceabilityYes-Date/Lot Code
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 3128-42 available?
We can source 3128-42 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 3128-42 by Northrop Grumman Systems Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3128-42 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 3128-42?
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 3128-42?
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.