General Microwave · Electronic Components
8557P4
Attenuator, Fixed
Part Number8557P4
ManufacturerGeneral Microwave
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-01-054-4747 (NSN)
Federal Item NameATTENUATOR,FIXED
Federal Supply Class5985 — Antennas and Waveguides
Application DesignTRANSMISSION LINETRANSMISSION LINE
Voltage Standing Wave Ratio Freque+0.0 TO 4.0 GIGAHERTZ AND +0.0 TO 4.0 GIGAHERTZ AND +4.0 TO 8.0 GIGAHERTZ AND +4.0 TO 8.0 GIGAHERTZ AND +8.0 TO 12.4 GIG
Mounting MethodCONNECTORCONNECTOR
Output Impedance Rating In Ohms50.050.0
Coaxial Connector Series DesignatiNN
Voltage Standing Wave Ratio1.15 AND 1.15 AND 1.20 AND 1.20 AND 1.25 AND 1.25 AND 1.401.40
Input Impedance Rating In Ohms50.050.0
Overall Diameter0.810 INCHES MAXIMUM0.810 INCHES MAXIMUM
Body StyleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACEROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
Terminal Type And Quantity2 CONNECTOR2 CONNECTOR
Overall Length2.460 INCHES NOMINAL2.460 INCHES NOMINAL
Vendor Part Numbers388-20DB
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 8557P4 available?
We can source 8557P4 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 8557P4 by General Microwave obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 8557P4 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 8557P4?
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 8557P4?
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.