Northrop Grumman Systems Corporation · Electronic Components
B489-306
Switch, Thermostatic
Part NumberB489-306
ManufacturerNorthrop Grumman Systems Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-611-4572 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Overall Length4.000 INCHES NOMINAL
Mounting MethodUNTHREADED HOLE(S)
Overall Width1.500 INCHES NOMINAL
Contact Action StimulusINCREASE
Nonpile Up Contact Arrangement1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION
Contact Stimulus Rating50.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 40.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT
Temp Sensing Element TypeINTERNAL SENSOR
Overall Height1.000 INCHES NOMINAL
Unthreaded Mounting Hole Diameter0.156 INCHES NOMINAL
Vendor Part Numbers489-306
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 B489-306 available?
We can source B489-306 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 B489-306 by Northrop Grumman Systems Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If B489-306 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 B489-306?
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 B489-306?
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.