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Technical Data Sheet
21-042A ✓ 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 RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include duty_type: CONTINUOUS, head_style: PAN, head_height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, overall_width: 4.760 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-346-3642, 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
21-042A
NSN: 5945-00-346-3642
FSC: 5945
CAGE: 18741 — TE CONNECTIVITY CORPORATION (USA)
SPECIFICATIONS
duty_typeCONTINUOUS
head_stylePAN
head_height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
thread_class2A A
coil_quantity2
head_diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
overall_width4.760 INCHES NOMINAL IN
thread_length0.158 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
overall_height4.500 INCHES NOMINAL IN
overall_length5.250 INCHES NOMINAL IN
fastener_length0.220 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
NSN5945-00-346-3642
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,ELECTROMAGNETIC TITLE COMPONENT PN 21-042A MFR RELAY,ELECTROMAGNETIC
KEY FEATURES
COIL QUANTITY: 2
ENVIRONMENTAL PROTECTION: HUMIDITY RESISTANT
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS: 28.0 DC
FREQUENCY IN HERTZ: 60.0 MINIMUM AND 375.0 MAXIMUM
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP: 115.0 VOLTS AC 25 DEG CELSIUS ALL WINDINGS
MOUNTING FACILITY TYPE AND QUANTITY: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
FEATURES PROVIDED: POLARIZED
UNTHREADED MOUNTING HOLE DIAMETER: 0.196 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
TECHNICAL CHARACTERISTICS (FLIS)
COIL QUANTITY2
ENVIRONMENTAL PROTECTIONHUMIDITY RESISTANT
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS28.0 DC
FREQUENCY IN HERTZ60.0 MINIMUM AND 375.0 MAXIMUM
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP115.0 VOLTS AC 25 DEG CELSIUS ALL WINDINGS
MOUNTING FACILITY TYPE AND QUANTITY4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
FEATURES PROVIDEDPOLARIZED
UNTHREADED MOUNTING HOLE DIAMETER0.196 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
MAIN CONTACT LOAD CURRENT RATING AT MAXIMUM RATED VOLTAGE3.0 AMPERES DC RESISTIVE LOAD
MOUNTING FACILITY PATTERNRECTANGULAR SINGLE MOUNTING FACILITY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
5800332-1800-000Interchangeable
interchangeable cross-reference
interchangeable
101043Interchangeable
interchangeable cross-reference
interchangeable
PP2490APXInterchangeable
interchangeable cross-reference
interchangeable
722899-270Interchangeable
interchangeable cross-reference
interchangeable
N100712-1Interchangeable
interchangeable cross-reference
interchangeable
1S2-25CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21-042A?
21-042A is a RELAY,ELECTROMAGNETIC.
What parts can replace 21-042A?
There are 14 known substitutes for 21-042A: 5800332-1800-000, 101043, PP2490APX and 11 more. Substitute compatibility should be verified for your specific system.
Is 21-042A still available?
21-042A is currently cancelled.
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