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Technical Data Sheet
PartsTable / MRO / 28140-1
28140-1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 SWITCH,CODE INDICATING WHEEL is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY CASE, power_source: EXTERNAL, inclosure_type: ENCASED, special_features: E.S.D. CRITICAL UNIT; ALSO THIS UNIT HAS RED EDGE LIGHTING, terminal_location: BACK, maximum_overall_width: 5.750 INCHES 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 5895-01-315-0549, 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→ 28140-1
NSN: 5895-01-315-0549
FSC: 5895
CAGE: 11627 — L3 TECHNOLOGIES, INC. DIV COMMUNICATION SYSTEMS-WEST (USA)
SPECIFICATIONS
materialALUMINUM ALLOY CASE
power_sourceEXTERNAL
inclosure_typeENCASED
special_featuresE.S.D. CRITICAL UNIT; ALSO THIS UNIT HAS RED EDGE LIGHTING
terminal_locationBACK
maximum_overall_width5.750 INCHES IN
maximum_overall_height6.750 INCHES IN
maximum_overall_length6.500 INCHES IN
end_item_identificationMD-1035B/A
terminal_type_and_quantity1 JACK
criticality_code_justificationFEAT
maximum_voltage_rating_in_volts28.0 DC
NSN5895-01-315-0549
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,CODE INDICATING WHEEL TITLE COMPONENT PN 28140-1 MFR SWITCH,CODE INDICATING
KEY FEATURES
•
INCLOSURE TYPE: ENCASED
•
MAXIMUM VOLTAGE RATING IN VOLTS: 28.0 DC
•
TERMINAL TYPE AND QUANTITY: 1 JACK
•
SUPPLEMENTARY FEATURES: INTERFACE W/HAND HELD MODULE (HHM) PROVIDES TIME AND FREQ TRANSFER TO OR FROM THE MODEM; PROVIDES INTERFACE TO EXTERNAL AUDIBLE EAM ALARM AND ACTIVATES ALARM WHEN WHEN ALARM DATA IS RECEIVED FROM MODEM; POWER OBTAINED FROM DUAL MODEM AND PASSES THROUGH THE MODEM CIRCUIT BREAKER; NO PROVISIONS FOR INTERNAL BATTERY
•
MATERIAL: ALUMINUM ALLOY CASE
•
FUNCTIONAL DESCRIPTION: PROVIDES OPERATOR INTERFACE FOR CONTROL AND OPERATIONAL PROGRAMMING OF MODEM,TELEGRAPH MD-1035B/A; PROVIDES DISPLAY OF PREDETERMINED MENUS FOR OPERATOR TO SELECT MODES OF OPERATION AND SPECIFIC OPERATIONAL PARAMETERS FOR MODEM AND ASSOCIATED RADIO THEN ENTER MODES AND PARAMETERS SELECTED INTO PROGRAM FOR THE MICROPROCESSOR WHICH CONTROLS THE ASSOCIATED COMMUNICATIONS TERMINAL; ALLOWS OPERATOR TO INITIATE BUILT-IN TESTS; PROVIDES FREQ AND TIME TRANSFER BETWEEN MODEM AND HHM
TECHNICAL CHARACTERISTICS (FLIS)
INCLOSURE TYPEENCASED
MAXIMUM VOLTAGE RATING IN VOLTS28.0 DC
END ITEM IDENTIFICATIONMD-1035B/A
TERMINAL TYPE AND QUANTITY1 JACK
SUPPLEMENTARY FEATURESINTERFACE W/HAND HELD MODULE (HHM) PROVIDES TIME AND FREQ TRANSFER TO OR FROM THE MODEM; PROVIDES INTERFACE TO EXTERNAL AUDIBLE EAM ALARM AND ACTIVATES ALARM WHEN WHEN ALARM DATA IS RECEIVED FROM MODEM; POWER OBTAINED FROM DUAL MODEM AND PASSES THROUGH THE MODEM CIRCUIT BREAKER; NO PROVISIONS FOR INTERNAL BATTERY
SPECIAL FEATURESE.S.D. CRITICAL UNIT; ALSO THIS UNIT HAS RED EDGE LIGHTING
MATERIALALUMINUM ALLOY CASE
FUNCTIONAL DESCRIPTIONPROVIDES OPERATOR INTERFACE FOR CONTROL AND OPERATIONAL PROGRAMMING OF MODEM,TELEGRAPH MD-1035B/A; PROVIDES DISPLAY OF PREDETERMINED MENUS FOR OPERATOR TO SELECT MODES OF OPERATION AND SPECIFIC OPERATIONAL PARAMETERS FOR MODEM AND ASSOCIATED RADIO THEN ENTER MODES AND PARAMETERS SELECTED INTO PROGRAM FOR THE MICROPROCESSOR WHICH CONTROLS THE ASSOCIATED COMMUNICATIONS TERMINAL; ALLOWS OPERATOR TO INITIATE BUILT-IN TESTS; PROVIDES FREQ AND TIME TRANSFER BETWEEN MODEM AND HHM
POWER SOURCEEXTERNAL
MAXIMUM WATTAGE RATING IN WATTS35.0
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
109-09107Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-3614BInterchangeable
interchangeable cross-reference
interchangeable
107-09101Interchangeable
interchangeable cross-reference
interchangeable
5L.4661.004.39Interchangeable
interchangeable cross-reference
interchangeable
28140-1Interchangeable
interchangeable cross-reference
interchangeable
C11637(V)1/AInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28140-1?
28140-1 is a SWITCH,CODE INDICATING WHEEL. It is classified as a MRO (MRO_GENERAL).
What parts can replace 28140-1?
There are 6 known substitutes for 28140-1: 109-09107, MIL-P-3614B, 107-09101 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28140-1?
28140-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5895-01-315-0549. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026