Waveline Inc. · Electronic Components
681
Dummy Load, Electrical
Part Number681
ManufacturerWaveline Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-00-538-7328 (NSN)
Federal Item NameDUMMY LOAD,ELECTRICAL
Federal Supply Class5985 — Antennas and Waveguides
Voltage Standing Wave Ratio Freque+8.200 TO 12.400 GIGAHERTZ
Waveguide Flange DesignationUG-135/U
Voltage Standing Wave Ratio1.10
Frequency Range Rating+8.200 TO 12.400 GIGAHERTZ
Termination TypeWAVEGUIDE FLANGE
Operating PositionALL POSITIONS
Power Rating500.000 WATTS AVERAGE AND 250.000 KILOWATTS PEAK
Style DesignatorWAVEGUIDE MOUNTED
Test Data Document81349-MIL-D-3954 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DAT
Cooling MethodSELF-COOLED
Overall Length5.625 INCHES NOMINAL
Cancelled NSN6625-00-553-5693 (cancelled)
Reliability IndicatorNOT ESTABLISHED
Winding Operating Voltage230.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Center To Center Distance Between2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Body Width2.375 INCHES NOMINAL
Frequency Rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
Nominal Thread Size0.138 INCHES SINGLE GROUP
Input Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Body Length2.750 INCHES NOMINAL
Winding Function And Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
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 681 available?
We can source 681 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 681 by Waveline Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 681 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 681?
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 681?
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.