PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

CN-30B/UAttenuator,fixed

Joint Electronics Type Designation System · NSN 5985-00-045-5527 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-045-5527 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-045-5527. Primary manufacturer part number: CN-30B/U.
Features
  • Attenuator,fixed — FSC 5985
  • Operating Temp Range: -55.0 TO 85.0 CELSIUS DEGC
  • Voltage Standing Wave Ratio: 1.15
  • Test Data Document: 81349-MIL-A-3933 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Frequency Range: 1.000 MEGAHERTZ MINIMUM AND 1.500 MEGAHERTZ MAXIMUM
  • Attenuation Accuracy in Decibels: -0.01 TO 0.01
  • Coaxial Connector Series Designation: N
  • Terminal Type and Quantity: 2 CONNECTOR
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,fixed, cataloged under National Stock Number 5985-00-045-5527, is classified within Federal Supply Class 5985 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Joint Electronics Type Designation System. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-045-5527
Primary Part NumberCN-30B/U
Item NameAttenuator,fixed
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerJoint Electronics Type Designation System
StatusACTIVE
Operating Temp Range-55.0 TO 85.0 CELSIUS DEGC
Voltage Standing Wave Ratio1.15
Test Data Document81349-MIL-A-3933 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Frequency Range1.000 MEGAHERTZ MINIMUM AND 1.500 MEGAHERTZ MAXIMUM
Attenuation Accuracy in Decibels-0.01 TO 0.01
Coaxial Connector Series DesignationN
Terminal Type and Quantity2 CONNECTOR
Voltage Standing Wave Ratio Frequency Range+1.0 TO 1.5 MEGAHERTZ
Input Impedance Rating in Ohms50.0
Output Impedance Rating in Ohms50.0
Overall Diameter0.781 INCHES NOMINAL IN
Rf Signal Attenuation in Decibels10.0
Connection Type Per FunctionFEMALE OUTPUT AND MALE INPUT
Power Rating1.0 WATTS AVERAGE
Mounting MethodTERMINAL
Body StyleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
Application DesignTRANSMISSION LINE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5985-00-928-1557 INTERCHANGEABLE
Attenuator,fixed
5985-00-947-8269 INTERCHANGEABLE
Attenuator,fixed
5985-01-228-6968 INTERCHANGEABLE
Attenuator,fixed
Cross-Reference Index
Part NumberManufacturer
CN-30B/U Joint Electronics Type Designation System (USA)
M3933/6-1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-A-3933/6 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5985-00-928-1557INTERCHANGEABLE
ATTENUATOR,FIXED
5985-00-947-8269INTERCHANGEABLE
ATTENUATOR,FIXED
5985-01-228-6968INTERCHANGEABLE
ATTENUATOR,FIXED

Frequently Asked Questions

What is NSN 5985-00-045-5527?

NSN 5985-00-045-5527 is a Attenuator,fixed, manufactured by Joint Electronics Type Designation System, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-045-5527?

NSN 5985-00-045-5527 has 3 cross-referenced part numbers: CN-30B/U (Joint Electronics Type Designation System), M3933/6-1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-A-3933/6 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5985-00-045-5527?

There are 3 known substitutes for 5985-00-045-5527: 5985-00-928-1557, 5985-00-947-8269, 5985-01-228-6968. Verify interchangeability with system specifications before substitution.

What are the specifications of CN-30B/U?

Key specifications for CN-30B/U: Operating Temp Range: -55.0 TO 85.0 CELSIUS DEGC; Voltage Standing Wave Ratio: 1.15; Test Data Document: 81349-MIL-A-3933 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Frequency Range: 1.000 MEGAHERTZ MINIMUM AND 1.500 MEGAHERTZ MAXIMUM. 18 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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