Amperite Co Inc. · Electronic Components
4A1
Resistor, Current Regulating
Part Number4A1
ManufacturerAmperite Co Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-549-1527 (NSN)
Federal Item NameRESISTOR,CURRENT REGULATING
Federal Supply Class5905 — Resistors
Threshold Voltage In Volts3.0
Envelope Type Per Mil E 1T9/1-4/
Current TypeAC/DC
Current Range In Amps+0.290 TO 0.310
Resistive Element Pin Connection1 AND 4
Base Type4 PIN
Body Diameter1.084 INCHES NOMINAL
Mounting ConfigurationTWO 0.073 IN. DIA MTG HOLES LOCATED 180 DEG APART ON PERIPHERAL SURFACE
Surface TreatmentANODIZE
MaterialALUMINUM
Body Height1.123 INCHES NOMINAL
FSC Application DataMOTOR,DIRECT CURRENT
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 4A1 available?
We can source 4A1 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 4A1 by Amperite Co Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 4A1 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 4A1?
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 4A1?
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.