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R103858 ✓ 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

TRANSFORMER,POWER AUTOTRANSFORME. Key specifications include body_width: 2.375 INCHES NOMINAL IN, body_height: 3.812 INCHES NOMINAL IN, body_length: 2.750 INCHES NOMINAL IN, inclosure_type: FULLY INCLOSED, mounting_method: THREADED STUD(S) SINGLE GROUP, frequency_rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-01-155-4778, 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
R103858
NSN: 5950-01-155-4778
FSC: 5950
CAGE: 98330 — OECO, LLC (USA)
SPECIFICATIONS
body_width2.375 INCHES NOMINAL IN
body_height3.812 INCHES NOMINAL IN
body_length2.750 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
mounting_methodTHREADED STUD(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
special_featuresWEAPON SYSTEM ESSENTIAL
nominal_thread_size0.138 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
end_item_identificationARLEIGH BURKE CLASS DDG; MISSILE SYSTEM, AEGIS SURFACE (SMS) MK 7; GUIDED MISSILE LAUNCHING SYSTEM, MK 26 (GMLS); TICONDEROGA CLASS CG (47)
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
winding_operating_current320.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY INPUT
NSN5950-01-155-4778
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,POWER AUTOTRANSFORME TITLE COMPONENT PN R103858 MFR TRANSFORMER,POWER AUTO
KEY FEATURES
•
RELIABILITY INDICATOR: NOT ESTABLISHED
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
•
BODY LENGTH: 2.750 INCHES NOMINAL IN
•
WINDING OPERATING VOLTAGE: 57.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
•
MOUNTING FACILITY QUANTITY: 4 SINGLE GROUP
•
FREQUENCY RATING: 400.0 HERTZ NOMINAL SINGLE COMPONENT
•
MOUNTING METHOD: THREADED STUD(S) SINGLE GROUP
TECHNICAL CHARACTERISTICS (FLIS)
RELIABILITY INDICATORNOT ESTABLISHED
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
BODY LENGTH2.750 INCHES NOMINAL IN
WINDING OPERATING VOLTAGE57.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
MOUNTING FACILITY QUANTITY4 SINGLE GROUP
FREQUENCY RATING400.0 HERTZ NOMINAL SINGLE COMPONENT
MOUNTING METHODTHREADED STUD(S) SINGLE GROUP
WINDING OPERATING VOLTAGE115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
04192Interchangeable
interchangeable cross-reference
interchangeable
MME-10-25Interchangeable
interchangeable cross-reference
interchangeable
M101-1399360-25VDCInterchangeable
interchangeable cross-reference
interchangeable
709679Interchangeable
interchangeable cross-reference
interchangeable
44459Interchangeable
interchangeable cross-reference
interchangeable
550 25Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R103858?
R103858 is a TRANSFORMER,POWER AUTOTRANSFORME.
What parts can replace R103858?
There are 13 known substitutes for R103858: 04192, MME-10-25, M101-1399360-25VDC and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R103858?
R103858 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-01-155-4778. 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