Sigma Electronics · Electronic Components
C4491
Reactor — Coils and Transformers
Part NumberC4491
ManufacturerSigma Electronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-01-104-7458 (NSN)
Federal Item NameREACTOR
Federal Supply Class5950 — Coils and Transformers
Winding Quantity1 SINGLE COMPONENT
Inductance TypeMECHANICALLY ADJUSTABLE
Center To Center Distance Between1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current1.0 AMPERES DC MINIMUM AND 30.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
Inductance Rating13.00 MICROHENRIES MINIMUM AND 188.00 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING
Mounting Facility Quantity4 SINGLE GROUP
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Body Width1.400 INCHES MAXIMUM
Rating MethodELECTRICAL SINGLE COMPONENT SINGLE WINDING
Thread Quantity Per Inch38 SINGLE GROUP
Vendor Part Numbers18084
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 C4491 available?
We can source C4491 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 C4491 by Sigma Electronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If C4491 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 C4491?
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 C4491?
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.