NSN 5985-00-434-2235, 5985004342235
ATTENUATOR,VARIABLE

Federal Supply Classification: FSC 5985 - Antennas, Waveguides, and Related Equipment
National Item Identification Number: NIIN 004342235
Codification Country: United States
Item Name Code: INC 00838
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (P) There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product.

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DLMS^® Summary

National Stock Number 5985-00-434-2235

National Stock Number (NSN) 5985-00-434-2235, or NIIN 004342235, (attenuator,variable) was assigned February 11, 1972 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.

This part number has not been procured by the US Government in over 5 years.

This NSN is assigned to Item Name Code (INC) 00838. [A DEVICE FOR REDUCING THE STRENGTH OF AN ALTERNATING CURRENT SIGNAL EITHER CONTINUOUSLY OR IN STEPS, WITHOUT CAUSING APPRECIABLE SIGNAL DISTORTION, BY MAINTAINING SUBSTANTIALLY CONSTANT OUTPUT AND/OR INPUT IMPEDANCE MATCH. CONTINUOUSLY VARIABLE RESISTIVE DEVICES MUST CONSIST OF AT LEAST TWO SECTIONS OR ONE SECTION WITH AT LEAST TWO ROTATING CONTACTS. THE ITEM MUST HAVE AN OVERALL ATTENUATION RATING. INCLUDES TANDEM MOUNTED VARIABLE RESISTORS DESIGNED TO FUNCTION AS AN ATTENUATOR BUT WHOSE TERMINALS ARE NOT CONNECTED. SEE ALSO RESISTOR, VAIABLE (AS MODIFIED).]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 5985004342235 contains an unknown precious metal.

This NSN is associated to Schedule B 8529109000: antenna & antenna reflectors of all kinds; parts suitable for use soley or principally w/ apparatus of heading 8525 to 8528, nesoi. The Schedule B End Use is listed as telecommunications equipment. NAICS classification category 334220: radio and television broadcasting and wireless communications equipment manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

III APPLICATION DESIGN: (AAFS) TRANSMISSION LINE
OVERALL ATTENUATION RANGE IN DECIBELS: (ASYD) +0.0/+70.0
OPERATING TEMP RANGE: (AFGA) +0.0 TO 55.0 DEG CELSIUS
SEGMENT ATTENUATION RANGE IN DECIBELS: (BQNS) +1.00/+9.00 AND +10.00/+19.00 AND +20.00 TO 29.00 AND +30.00 TO 39.00 AND +40.00 TO 49.00 AND +50.00 TO 59.00
OPERATING TEMP RANGE: (AFGA) +0.0/+55.0 DEG CELSIUS
ADJUSTMENT DEVICE TYPE AND QUANTITY: (CQTQ) 2 KNOB
APPLICATION DESIGN: (AAFS) TRANSMISSION LINE
ATTENUATION PER STEP IN DECIBELS: (ASYH) 1.0 AND 10.0
ATTENUATION VARIATION METHOD: (ASYF) STEPPED
BODY STYLE: (AAQL) COAXIAL TYPE
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO HEIGHT: (AEBW) 2.000 INCHES NOMINAL
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH: (ABKR) 2.000 INCHES NOMINAL
COAXIAL CONNECTOR SERIES DESIGNATION: (AHUC) N
FREQUENCY RANGE: (BNGR) 0.000 HERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
IMPEDANCE RATING IN OHMS: (CTGG) 50.0 INPUT-OUTPUT
INSERTION LOSS AT MINIMUM ATTENUATION IN MAXIMUM DECIBELS: (ASYC) 1.2
OVERALL LENGTH: (ABHP) 9.000 INCHES NOMINAL
OVERALL WIDTH: (ABMK) 5.000 INCHES NOMINAL
MOUNTING FACILITY PATTERN: (CQYJ) FOUR POSITION RECTANGULAR
MOUNTING SLOT LENGTH: (ABVG) 0.375 INCHES MAXIMUM
MOUNTING SLOT WIDTH: (ABTD) 0.187 INCHES MAXIMUM
OPERATING TEMP RANGE: (AFGA) +0.0 TO 55.0 CELSIUS
OVERALL ATTENUATION ACCURACY IN DECIBELS: (BQNR) +0.00 TO 0.15
OVERALL ATTENUATION RANGE IN DECIBELS: (ASYD) +0.0 TO 70.0
OVERALL HEIGHT: (ABKW) 3.380 INCHES NOMINAL
SPECIAL FEATURES: (FEAT) ATTENUATION ACCURACY MEASURED AT 1.0,2.0,4.0,8.0,AND 12.4 GIGAHERTZ
POWER RATING: (AJDB) 1.0 WATTS AVERAGE AND 500.0 WATTS PEAK
SEGMENT ATTENUATION ACCURACY IN DECIBELS: (BQNT) -0.40 TO 0.40 AND -1.00 TO 1.00 AND -1.20 TO 1.20 AND -1.40 TO 1.40 AND -1.50 TO 1.50 AND -1.70 TO 1.70
SEGMENT ATTENUATION RANGE IN DECIBELS: (BQNS) +1.00 TO 9.00 AND +10.00 TO 19.00 AND +20.00 TO 29.00 AND +30.00 TO 39.00 AND +40.00 TO 49.00 AND +50.00 TO 59.00
STEP POSITION QUANTITY: (ASYG) 16
TERMINAL TYPE AND QUANTITY: (TTQY) 2 CONNECTOR, COAXIAL, FEMALE
TEST DATA DOCUMENT: (TEST) 12217-1291029 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
VOLTAGE STANDING WAVE RATIO: (AHTW) 1.20 AND 1.30 AND 1.35 AND 1.45 AND 1.50
OVERALL ATTENUATION ACCURACY IN DECIBELS: (BQNR) +0.00/+0.15
SEGMENT ATTENUATION ACCURACY IN DECIBELS: (BQNT) -0.40/+0.40 AND -1.00 TO 1.00 AND -1.20/+1.20 AND -1.40/+1.40 AND -1.50 TO 1.50 AND -1.70 TO 1.70