Crydom Co. · Electronic Components
A4890
RELAY SSR 90A 480VAC AC
Part NumberA4890
ManufacturerCrydom Co.
AvailabilityAvailable to order — request a quote
Specifications
NSN3010-01-023-4278 (NSN)
Additional NSNs4730-00-585-2204
Federal Item NameCLUTCH HALF,POSITIVE,NONVEHICULA
Bore Diameter2.046 INCHES NOMINAL
Jaw Circle Outside Diameter5.620 INCHES NOMINAL
Bore ShapeSTRAIGHT
Style DesignatorDRIVEN JAW
Jaw Circle Inside Diameter3.755 INCHES NOMINAL
Federal Supply Class3010 — Torque Converters And Speed Changers
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 A4890 available?
We can source A4890 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 A4890 by Crydom Co. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A4890 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 A4890?
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 A4890?
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.