Servo Instrument · Electronic Components
28A1-2185
Resistor, Variable, Wire Wound, Pre
Part Number28A1-2185
ManufacturerServo Instrument
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-378-0895 (NSN)
Federal Item NameRESISTOR,VARIABLE,WIRE WOUND,PRE
Federal Supply Class5905 — Resistors
Reliability IndicatorNOT ESTABLISHED
Function Conformity Tolerance Per-1.00 TO 1.00 SINGLE SECTION
Body Diameter1.750 INCHES NOMINAL
Body Length0.812 INCHES NOMINAL
Rotary Actuator Travel In Angular330.0 NOMINAL
Ambient Temp In Deg Celsius Per Se100.0 SINGLE SECTION
Mounting MethodTHREADED HOLE(S)
Fragility FactorRUGGED
Bearing TypeBEARING SHAFT
Maximum Starting Torque2.50 INCH-OUNCES
Mounting Facility Quantity2
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 28A1-2185 available?
We can source 28A1-2185 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 28A1-2185 by Servo Instrument obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 28A1-2185 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 28A1-2185?
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 28A1-2185?
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.