Electric Machinery Dresser Industries Inc. · Electronic Components
21155
Insulator, Plate
Part Number21155
ManufacturerElectric Machinery Dresser Industries Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5970-00-575-5831 (NSN)
Federal Item NameINSULATOR,PLATE
Federal Supply Class5970 — Electrical Insulators
Vendor Part NumbersMJ21155
Cancelled NSN3655-00-633-4465 (cancelled)
Inductance Rating31.50 MICROHENRIES NOMINAL SINGLE COMPONENT SECOND WINDING
Dc Resistance Rating In Ohms0.050 SINGLE COMPONENT FIFTH WINDING
Frequency Rating10.0 KILOHERTZ NOMINAL SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Inductance TypeFIXED
Mounting Hole Diameter0.114 INCHES NOMINAL ALL GROUPINGS
Inclosure TypeFULLY INCLOSED
Rating MethodELECTRICAL SINGLE COMPONENT ALL WINDING
Terminal Type And Quantity12 PRINTED CIRCUIT
Mounting MethodTERMINAL AND UNTHREADED HOLE(S) SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
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 21155 available?
We can source 21155 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 21155 by Electric Machinery Dresser Industries Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21155 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 21155?
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 21155?
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.