Model: 644A

Directional Coupler

Properties:

Overall Length
4.156 inches
Overall Height
1.312 inches
Overall Width
2.875 inches
Radio Frequency Rating
Between 3.0 megahertz and 300.0 megahertz
Design Type
Unidirectional
Unit Type
Transmission line
Voltage Standing Wave Ratio At Reference Frequency
1.15 to 1 at 300 mhz
Power Loss In Decibels
21.5 and 62.0
Terminal Fitting Name
Connector
Terminal Fitting Controlling Agency
Gremar corp
Terminal Fitting Identifying Number
Type no. 5444; type no. 5445
Terminal Fitting Usage Design
Main line and main line and secondary line
NSN
5985-00-912-9894
Part Number
644A
Description
Coupler,directional
CAGE
61364

An item specifically designed to be inserted into a transmission line, waveguide or coaxial transmission line to provide a suitable test outlet. The test signal is attenuated to a predetermined value.

Part 644A NSN 5985-00-912-9894

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00384
FIIG:
T389-C
Concept No.:
App. Key:
CB
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061700
UFC:
34580
LTL:
RATING VARIABLE
LCL:
77.5
WCC:
653
TCC:
Z
SHC:
Z
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8529109000
  • SITC: 76493
  • End Use: Telecommunications equipment
  • NAICS: 334220
  • USDA: 1

Freight Class: Antenna & antenna reflectors of all kinds; parts suitable for use soley or principally w/ apparatus of heading 8525 to 8528, nesoi

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