Ampex Data Systems Corp. Computer Products Div · Electronic Components
581-557
SEMICONDUCTOR DEVICE,DIODE — NSN 5961-01-227-4216
Part Number581-557
ManufacturerAmpex Data Systems Corp. Computer Products Div
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-227-4216 (NSN)
Federal Item NameSEMICONDUCTOR DEVICE,DIODE
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
MaterialSILICON SEMICONDUCTOR; GLASS ENCLOSURE
Current Rating1.00 AMPERES NOMINAL AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE
Terminals2 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Overall Length0.235 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
Overall Diameter0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM
Voltage Rating In Volts Per Charac20.0 NOMINAL WORKING PEAK REVERSE VOLTAGE
Terminal Length1.100 INCHES MINIMUM
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 581-557 available?
We can source 581-557 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 581-557 by Ampex Data Systems Corp. Computer Products Div obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 581-557 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 581-557?
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 581-557?
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.