Servo Instrument Corporation · Electronic Components
28A4-2184
Resistor, Variable, Wire Wound, Pre
Part Number28A4-2184
ManufacturerServo Instrument Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-215-2788 (NSN)
Federal Item NameRESISTOR,VARIABLE,WIRE WOUND,PRE
Federal Supply Class5905 — Resistors
Body Length4.500 INCHES NOMINAL
Shaft StyleROUND
Ambient Temp In Deg Celsius Per Se100.0 ALL SECTIONS
Electrical Resistance Per Section30.7 KILOHMS ALL SECTIONS
Actuator TypeSINGLE SHAFT
Effective Electrical Rotation In D320.0 NOMINAL
Bearing TypeSLEEVE SHAFT
Screw Thread Diameter0.375 INCHES NOMINAL
Maximum Starting Torque2.50 INCH-OUNCES
Screw Thread Series DesignatorUNEF
Mounting MethodSTANDARD BUSHING
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 28A4-2184 available?
We can source 28A4-2184 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 28A4-2184 by Servo Instrument Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 28A4-2184 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 28A4-2184?
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 28A4-2184?
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.