MD643 — MD643

✓ Government record, cited

— · MRO · MRO_GENERAL

PRODUCT OVERVIEW

MD643: MD643.

The MD643 is a the manufacturer industrial component. Key specifications include inclosure_type: ENCASED, overall_length: 0.410 INCHES NOMINAL IN, connection_type: COAXIAL RECEPTACLE BOTTOM, overall_diameter: 0.380 INCHES NOMINAL IN, basic_shape_style: CYLINDRICAL, installation_design: MODULE. This part is cataloged in the U.S.

Government catalog under NSN 5895-00-239-9138, 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

MRO→ MRO_GENERAL→ MD643

NSN: 5895-00-239-9138
FSC: 5895 — Miscellaneous Communication Equipment
CAGE: 96341 — COBHAM ADVANCED ELECTRONIC SOLUTIONS INC. (USA)

SPECIFICATIONS

inclosure_type	ENCASED
overall_length	0.410 INCHES NOMINAL IN
connection_type	COAXIAL RECEPTACLE BOTTOM
overall_diameter	0.380 INCHES NOMINAL IN
basic_shape_style	CYLINDRICAL
installation_design	MODULE
fsc_application_data	SYNCHRONIZER-EXCITER,RADAR SET,AIRBORNE
operating_temp_range	-55.0 TO 100.0 CELSIUS DEGC
frequency_per_channel	500.0 MEGAHERTZ MAXIMUM 1ST INPUT CHANNEL
average_life_measurement	NOT RATED
circuit_construction_type	SOLID STATE
impedance_rating_per_channel	50.000 OHMS OUTPUT CHANNEL
NSN	5895-00-239-9138

COMPONENT DIAGRAM

KEY FEATURES

•

CIRCUIT CONSTRUCTION TYPE: SOLID STATE

•

FSC APPLICATION DATA: SYNCHRONIZER-EXCITER,RADAR SET,AIRBORNE

•

IMPEDANCE RATING PER CHANNEL: 50.000 OHMS 2ND INPUT CHANNEL

•

INCLOSURE TYPE: ENCASED

•

OVERALL DIAMETER: 0.380 INCHES NOMINAL IN

•

FREQUENCY PER CHANNEL: 500.0 MEGAHERTZ MAXIMUM OUTPUT CHANNEL

TECHNICAL CHARACTERISTICS

CIRCUIT CONSTRUCTION TYPE	SOLID STATE
FSC APPLICATION DATA	SYNCHRONIZER-EXCITER,RADAR SET,AIRBORNE
IMPEDANCE RATING PER CHANNEL	50.000 OHMS 2ND INPUT CHANNEL
IMPEDANCE RATING PER CHANNEL	50.000 OHMS OUTPUT CHANNEL
IMPEDANCE RATING PER CHANNEL	50.000 OHMS 1ST INPUT CHANNEL
INCLOSURE TYPE	ENCASED
OVERALL DIAMETER	0.380 INCHES NOMINAL IN
FREQUENCY PER CHANNEL	500.0 MEGAHERTZ MAXIMUM OUTPUT CHANNEL
FREQUENCY PER CHANNEL	0.0 MEGAHERTZ MINIMUM 2ND INPUT CHANNEL
FREQUENCY PER CHANNEL	2.0 MEGAHERTZ MINIMUM 1ST INPUT CHANNEL

OTHER ITEMS IN FSC 5895 — Miscellaneous Communication Equipment

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5895-00-000-0116 5895-00-001-1613 5895-00-001-1816 5895-00-001-1867 5895-00-001-2457 5895-00-001-2722 5895-00-001-2735 5895-00-001-2738

SUBSTITUTES & CROSS-REFERENCES 2

539303-1Reference document

Same NSN cross-reference

Reference document — Vendor item drawing reference

642AS2720Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation + specific procedure

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FREQUENTLY ASKED QUESTIONS

What is MD643?

MD643 is a MD643. It is classified as a MRO (MRO_GENERAL).

What parts can replace MD643?

There are 2 known substitutes for MD643: 539303-1, 642AS2720. Substitute compatibility should be verified for your specific system.

What is the NSN for MD643?

MD643 is cataloged in the U.S. Government catalog under NSN 5895-00-239-9138. This indicates validated use in U.S. government and defense supply chains.

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