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Technical Data Sheet
PartsTable / COMPONENT / R-TBD-957
R-TBD-957 ✓ Verified by PartsTable
— · COMPONENT
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 BAR,T,TELETYPEWRITER is a the manufacturer industrial component. Key specifications include dc_voltage_rating: 18.0 VOLTS NOMINAL AND 28.0 VOLTS NOMINAL, end_item_identification: B-1B ACFT, test_item_connection_method: CABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4940-01-186-2860, 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
R-TBD-957
NSN: 4940-01-186-2860
FSC: 4940
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
dc_voltage_rating18.0 VOLTS NOMINAL AND 28.0 VOLTS NOMINAL
functional_descriptionJUNCTION BOX WILL PROVIDE SWITCHES,CIRCUITRY,INTERFACE CABLES,AND TEST POINTS FOR PERFORMING VOLTAGE AND CONTINUITY TESTING OF THE EJECTOR RACK
end_item_identificationB-1B ACFT
test_item_connection_methodCABLE
NSN4940-01-186-2860
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BAR,T,TELETYPEWRITER TITLE COMPONENT PN R-TBD-957 MFR BAR,T,TELETYPEWRITER
KEY FEATURES
•
FUNCTIONAL DESCRIPTION: JUNCTION BOX WILL PROVIDE SWITCHES,CIRCUITRY,INTERFACE CABLES,AND TEST POINTS FOR PERFORMING VOLTAGE AND CONTINUITY TESTING OF THE EJECTOR RACK
•
TEST ITEM CONNECTION METHOD: CABLE
•
DC VOLTAGE RATING: 18.0 VOLTS NOMINAL AND 28.0 VOLTS NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
FUNCTIONAL DESCRIPTIONJUNCTION BOX WILL PROVIDE SWITCHES,CIRCUITRY,INTERFACE CABLES,AND TEST POINTS FOR PERFORMING VOLTAGE AND CONTINUITY TESTING OF THE EJECTOR RACK
END ITEM IDENTIFICATIONB-1B ACFT
TEST ITEM CONNECTION METHODCABLE
DC VOLTAGE RATING18.0 VOLTS NOMINAL AND 28.0 VOLTS NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
7421Interchangeable
interchangeable cross-reference
interchangeable
ML74AInterchangeable
interchangeable cross-reference
interchangeable
VTA427Interchangeable
interchangeable cross-reference
interchangeable
VT3620Interchangeable
interchangeable cross-reference
interchangeable
VT2266Interchangeable
interchangeable cross-reference
interchangeable
570535-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R-TBD-957?
R-TBD-957 is a BAR,T,TELETYPEWRITER.
What parts can replace R-TBD-957?
There are 11 known substitutes for R-TBD-957: 7421, ML74A, VTA427 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R-TBD-957?
R-TBD-957 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4940-01-186-2860. 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