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PartsTable / COMPONENT / 56A187B21
56A187B21 ✓ 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: 1.125 INCHES NOMINAL IN, body_height: 1.000 INCHES NOMINAL IN, body_length: 1.125 INCHES NOMINAL IN, inclosure_type: HERMETICALLY SEALED, mounting_method: THREADED HOLE(S) SINGLE GROUP, frequency_rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-543-9142, 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
56A187B21
NSN: 5950-00-543-9142
FSC: 5950
CAGE: 02387 — NAVAL AIR WARFARE CENTER AIRCRAFT DIV (USA)
SPECIFICATIONS
body_width1.125 INCHES NOMINAL IN
body_height1.000 INCHES NOMINAL IN
body_length1.125 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
nominal_thread_size0.112 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
thread_quantity_per_inch40 SINGLE GROUP
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
winding_operating_voltage1.10 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
mounting_facility_quantity4 SINGLE GROUP
NSN5950-00-543-9142
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,POWER AUTOTRANSFORME TITLE COMPONENT PN 56A187B21 MFR TRANSFORMER,POWER AUTO
KEY FEATURES
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH: 0.688 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
BODY LENGTH: 1.125 INCHES NOMINAL IN
•
RELIABILITY INDICATOR: NOT ESTABLISHED
•
WINDING FUNCTION AND QUANTITY: 1 PRIMARY, FIXED AUTOTRANSFORMER TYPE SINGLE COMPONENT
•
THREAD QUANTITY PER INCH: 40 SINGLE GROUP
•
BODY WIDTH: 1.125 INCHES NOMINAL IN
•
WINDING OPERATING VOLTAGE: 0.10 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
•
INPUT-OUTPUT PHASE RELATIONSHIP: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
TECHNICAL CHARACTERISTICS (FLIS)
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH0.688 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
BODY LENGTH1.125 INCHES NOMINAL IN
RELIABILITY INDICATORNOT ESTABLISHED
WINDING FUNCTION AND QUANTITY1 PRIMARY, FIXED AUTOTRANSFORMER TYPE SINGLE COMPONENT
THREAD QUANTITY PER INCH40 SINGLE GROUP
BODY WIDTH1.125 INCHES NOMINAL IN
WINDING OPERATING VOLTAGE0.10 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
INPUT-OUTPUT PHASE RELATIONSHIPSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
WINDING OPERATING VOLTAGE1.10 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
BA711579Interchangeable
interchangeable cross-reference
interchangeable
C32311-1Interchangeable
interchangeable cross-reference
interchangeable
TE114-10Interchangeable
interchangeable cross-reference
interchangeable
R1901SInterchangeable
interchangeable cross-reference
interchangeable
8485763Interchangeable
interchangeable cross-reference
interchangeable
36157Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56A187B21?
56A187B21 is a TRANSFORMER,POWER AUTOTRANSFORME.
What parts can replace 56A187B21?
There are 10 known substitutes for 56A187B21: BA711579, C32311-1, TE114-10 and 7 more. Substitute compatibility should be verified for your specific system.
Is 56A187B21 still available?
56A187B21 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026