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66A0054 ✓ 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 PANEL,TELEPHONE SWITCHBOARD is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL EXCEPT INSULATION, thread_length: 0.250 INCHES IN, overall_height: 0.890 INCHES IN, terminal_length: 0.304 INCHES IN, largest_diameter: 0.140 INCHES SINGLE END IN, overall_diameter: 0.250 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5940-00-727-5243, 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
66A0054
NSN: 5940-00-727-5243
FSC: 5940
CAGE: 52025 — SIEMENS ENERGY & AUTOMATION, INC. DBA SIEMENS AIRFIELD SOLUTIONS DIV SIEMENS ENERGY & AUTOMATION DBA SIEMENS AIRFIELD SOLUTIONS (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL EXCEPT INSULATION
thread_length0.250 INCHES IN
overall_height0.890 INCHES IN
terminal_length0.304 INCHES IN
largest_diameter0.140 INCHES SINGLE END IN
overall_diameter0.250 INCHES IN
basic_shape_styleNONTUBULAR, HEX
features_providedMOUNTING HARDWARE
surface_treatmentTIN OVERALL EXCEPT INSULATION SINGLE LAYER
thru-hole_diameter0.040 INCHES IN
width_across_flats0.250 INCHES IN
mounting_method_styleSTUD
NSN5940-00-727-5243
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PANEL,TELEPHONE SWITCHBOARD TITLE COMPONENT PN 66A0054 MFR PANEL,TELEPHONE SWITCH
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
A-A-59126/09Interchangeable
interchangeable cross-reference
interchangeable
SE090E01SInterchangeable
interchangeable cross-reference
interchangeable
MILT55155-9Interchangeable
interchangeable cross-reference
interchangeable
SW-1054-1Interchangeable
interchangeable cross-reference
interchangeable
6614Interchangeable
interchangeable cross-reference
interchangeable
GGG-C-406Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66A0054?
66A0054 is a PANEL,TELEPHONE SWITCHBOARD.
What parts can replace 66A0054?
There are 33 known substitutes for 66A0054: A-A-59126/09, SE090E01S, MILT55155-9 and 30 more. Substitute compatibility should be verified for your specific system.
Is 66A0054 still available?
66A0054 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026