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Technical Data Sheet
4778-20 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The ATTENUATOR,FIXED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, body_style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE, power_rating: 2.0 WATTS AVERAGE AND 500.0 WATTS PEAK, overall_length: 1.200 INCHES NOMINAL IN, frequency_range: 0.000 HERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM, mounting_method: CONNECTOR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-470-9256, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4778-20
NSN: 5985-00-470-9256
FSC: 5985
CAGE: 99899 — NARDA HOLDINGS, INC. DBA NARDA-MITEQ DIV NARDA-MITEQ (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
body_styleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
power_rating2.0 WATTS AVERAGE AND 500.0 WATTS PEAK
overall_length1.200 INCHES NOMINAL IN
frequency_range0.000 HERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
mounting_methodCONNECTOR
overall_diameter0.360 INCHES NOMINAL IN
surface_treatmentPASSIVATE BODY
application_designTRANSMISSION LINE
fsc_application_dataCOMMUNICATION EQUIPMENT
operating_temp_range-65.0 TO 125.0 CELSIUS DEGC
terminal_type_and_quantity2 CONNECTOR
NSN5985-00-470-9256
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ATTENUATOR,FIXED TITLE COMPONENT PN 4778-20 MFR ATTENUATOR,FIXED
KEY FEATURES
TERMINAL TYPE AND QUANTITY: 2 CONNECTOR
VOLTAGE STANDING WAVE RATIO FREQUENCY RANGE: +0.0 TO 4.0 GIGAHERTZ AND +4.0 TO 12.4 GIGAHERTZ
COAXIAL CONNECTOR SERIES DESIGNATION: SMA
FREQUENCY RANGE: 0.000 HERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
RF SIGNAL ATTENUATION IN DECIBELS: 20.0
POWER RATING: 2.0 WATTS AVERAGE AND 200.0 WATTS PEAK
OUTPUT IMPEDANCE RATING IN OHMS: 50.0
TECHNICAL CHARACTERISTICS (FLIS)
TERMINAL TYPE AND QUANTITY2 CONNECTOR
VOLTAGE STANDING WAVE RATIO FREQUENCY RANGE+0.0 TO 4.0 GIGAHERTZ AND +4.0 TO 12.4 GIGAHERTZ
COAXIAL CONNECTOR SERIES DESIGNATIONSMA
FREQUENCY RANGE0.000 HERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
RF SIGNAL ATTENUATION IN DECIBELS20.0
POWER RATING2.0 WATTS AVERAGE AND 200.0 WATTS PEAK
OVERALL LENGTH1.240 INCHES NOMINAL IN
OUTPUT IMPEDANCE RATING IN OHMS50.0
OVERALL DIAMETER0.380 INCHES MAXIMUM IN
ATTENUATION ACCURACY IN DECIBELS-0.50 TO 0.50
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
26745Interchangeable
interchangeable cross-reference
interchangeable
51558R2Interchangeable
interchangeable cross-reference
interchangeable
1214923-202Interchangeable
interchangeable cross-reference
interchangeable
A620CSInterchangeable
interchangeable cross-reference
interchangeable
1063-41025-40-3Interchangeable
Same NIIN cross-reference
interchangeable
587-029-015Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4778-20?
4778-20 is a ATTENUATOR,FIXED.
What parts can replace 4778-20?
There are 10 known substitutes for 4778-20: 26745, 51558R2, 1214923-202 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4778-20?
4778-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-470-9256. This indicates validated use in U.S. government and defense supply chains.
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