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Technical Data Sheet
A-399-4 ✓ 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,VARIABLE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, body_style: COAXIAL TYPE, overall_width: 1.953 INCHES NOMINAL IN, physical_form: LIQUID, overall_height: 3.812 INCHES NOMINAL IN, overall_length: 3.640 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-419-5371, 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
A-399-4
NSN: 5985-00-419-5371
FSC: 5985
CAGE: 12598 — RLC ELECTRONICS, INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
body_styleCOAXIAL TYPE
overall_width1.953 INCHES NOMINAL IN
physical_formLIQUID
overall_height3.812 INCHES NOMINAL IN
overall_length3.640 INCHES NOMINAL IN
frequency_range0.100 MEGAHERTZ MINIMUM AND 1.000 MEGAHERTZ MAXIMUM
special_featuresFLAMMABLE; BOILING POINT 117.7+/-0.1C; BOILING RANGE NOT MORE THAN 1.5C
application_designTRANSMISSION LINE
step_position_quantity3
impedance_rating_in_ohms600.0 INPUT-OUTPUT
mounting_facility_patternTHREE POSITION CIRCULAR
NSN5985-00-419-5371
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ATTENUATOR,VARIABLE TITLE COMPONENT PN A-399-4 MFR ATTENUATOR,VARIABLE
KEY FEATURES
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH: 1.562 INCHES NOMINAL IN
SEGMENT ATTENUATION ACCURACY IN DECIBELS: -0.125 TO 0.125 AND -0.25 TO 0.25
IMPEDANCE RATING IN OHMS: 600.0 INPUT-OUTPUT
SEGMENT ATTENUATION RANGE IN DECIBELS: +0.00 TO 10.00 AND +0.00 TO 40.00 AND +0.00 TO 50.00
INSERTION LOSS AT MINIMUM ATTENUATION IN MAXIMUM DECIBELS: 0.5
COAXIAL CONNECTOR SERIES DESIGNATION: BNC
FREQUENCY RANGE: 0.100 MEGAHERTZ MINIMUM AND 1.000 MEGAHERTZ MAXIMUM
ATTENUATION VARIATION METHOD: STEPPED
TECHNICAL CHARACTERISTICS (FLIS)
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH1.562 INCHES NOMINAL IN
SEGMENT ATTENUATION ACCURACY IN DECIBELS-0.125 TO 0.125 AND -0.25 TO 0.25
IMPEDANCE RATING IN OHMS600.0 INPUT-OUTPUT
SEGMENT ATTENUATION RANGE IN DECIBELS+0.00 TO 10.00 AND +0.00 TO 40.00 AND +0.00 TO 50.00
INSERTION LOSS AT MINIMUM ATTENUATION IN MAXIMUM DECIBELS0.5
COAXIAL CONNECTOR SERIES DESIGNATIONBNC
FREQUENCY RANGE0.100 MEGAHERTZ MINIMUM AND 1.000 MEGAHERTZ MAXIMUM
ATTENUATION VARIATION METHODSTEPPED
ADJUSTMENT DEVICE TYPE AND QUANTITY1 ELECTRONIC, VOLTAGE CONTROLLED
MOUNTING FACILITY TYPE AND QUANTITY3 UNTHREADED HOLE(S)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
11378Interchangeable
interchangeable cross-reference
interchangeable
126240Interchangeable
interchangeable cross-reference
interchangeable
B94.9Interchangeable
interchangeable cross-reference
interchangeable
C55000Interchangeable
interchangeable cross-reference
interchangeable
AD1693442Interchangeable
interchangeable cross-reference
interchangeable
EL-263-1 PIECE 64Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-399-4?
A-399-4 is a ATTENUATOR,VARIABLE.
What parts can replace A-399-4?
There are 11 known substitutes for A-399-4: 11378, 126240, B94.9 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-399-4?
A-399-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-419-5371. This indicates validated use in U.S. government and defense supply chains.
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