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Technical Data Sheet
S21B ✓ 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 MONITOR,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include color: BLACK BORDER, width: 36.000 INCHES NOMINAL IN, length: 36.000 INCHES NOMINAL IN, material: ALUMINUM ALLOY, thickness: 0.080 INCHES NOMINAL IN, body_width: 3.688 INCHES MAXIMUM 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 5950-00-419-9492, 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
S21B
NSN: 5950-00-419-9492
FSC: 5950
CAGE: 26522 — B G LABORATORIES INC. (USA)
SPECIFICATIONS
colorBLACK BORDER
width36.000 INCHES NOMINAL IN
length36.000 INCHES NOMINAL IN
materialALUMINUM ALLOY
thickness0.080 INCHES NOMINAL IN
body_width3.688 INCHES MAXIMUM IN
body_height4.500 INCHES NOMINAL IN
body_length4.312 INCHES MAXIMUM IN
inscriptionSCHOOL CROSSING
design_shapeRECTANGULAR WITH POINTED END
inclosure_typeHERMETICALLY SEALED
overall_height4.880 INCHES NOMINAL IN
NSN5950-00-419-9492
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MONITOR,AUDIO FREQUENCY TITLE COMPONENT PN S21B MFR MONITOR,AUDIO FREQUENC
KEY FEATURES
WINDING SHIELDING METHOD: INTERNAL SHIELD GROUNDED TO CORE AND BROUGHT OUT TO TERMINAL SINGLE COMPONENT
TERMINAL TYPE AND QUANTITY: 14 TURRET
INPUT-OUTPUT PHASE RELATIONSHIP: THREE PHASE TO SINGLE PHASE SINGLE COMPONENT
MOUNTING FACILITY QUANTITY: 4 SINGLE GROUP
BODY WIDTH: 3.688 INCHES MAXIMUM IN
INCLOSURE TYPE: HERMETICALLY SEALED
RELIABILITY INDICATOR: NOT ESTABLISHED
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT4.880 INCHES NOMINAL IN
WINDING SHIELDING METHODINTERNAL SHIELD GROUNDED TO CORE AND BROUGHT OUT TO TERMINAL SINGLE COMPONENT
TERMINAL TYPE AND QUANTITY14 TURRET
INPUT-OUTPUT PHASE RELATIONSHIPTHREE PHASE TO SINGLE PHASE SINGLE COMPONENT
MOUNTING FACILITY QUANTITY4 SINGLE GROUP
BODY WIDTH3.688 INCHES MAXIMUM IN
INCLOSURE TYPEHERMETICALLY SEALED
RELIABILITY INDICATORNOT ESTABLISHED
WINDING FUNCTION AND QUANTITY1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
FREQUENCY RATING400.0 HERTZ NOMINAL SINGLE COMPONENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
S2-1Interchangeable
interchangeable cross-reference
interchangeable
S2-1BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S21B?
S21B is a MONITOR,AUDIO FREQUENCY.
What parts can replace S21B?
There are 2 known substitutes for S21B: S2-1, S2-1B. Substitute compatibility should be verified for your specific system.
What is the NSN for S21B?
S21B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-419-9492. This indicates validated use in U.S. government and defense supply chains.
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