Te Connectivity Corporation · Electronic Components
521
Terminal Board
Part Number521
ManufacturerTe Connectivity Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5940-00-180-8213 (NSN)
Federal Item NameTERMINAL BOARD
Federal Supply Class5940 — Lugs, Terminals, and Terminal Strips
MaterialPLASTIC AND GLASS BOARD
Vendor Part NumbersE31-0008-001
Contact Load Current Rating At Max3.000 AMPERES RESISTIVE AC
Thread Series DesignatorUN
Nominal Thread Size0.500 INCHES
Thread Quantity Per Inch32
Inclosure TypeFULLY INCLOSED
Maximum Voltage Rating In Volts250.0 AC
Nonpile Up Contact Arrangement1 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED SINGLE SWITCH UNIT
Terminal Type And Quantity3 TAB, SOLDER LUG
Cancelled NSN5930-00-560-9318 (cancelled)
ColorSILVER SINGLE ACTUATOR
Body Diameter0.750 INCHES NOMINAL
Switch Actuator Quantity1
Body StyleBUSHING MOUNTED
Style DesignatorRECTANGULAR TERMINAL/TERMINALS ON TWO SURFACES
Reference Frequency Per Function312.5 MEGAHERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
Mounting Facility Screw Thread SerUNIFIED NATIONAL COARSE (UNC)
Insertion Loss At Reference Freque0.3 BLANK LOCATION NOT OTHERWISE SPECIFIED
Output Terminal Manufacturer Code80058
Functional Terminal Type And Quant1 CONNECTOR, RECEPTACLE INPUT FIRST FUNCTION
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 521 available?
We can source 521 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 521 by Te Connectivity Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 521 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 521?
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 521?
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.