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Technical Data Sheet
B4-903 ✓ 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, thread_class: 2B SINGLE MOUNTING FACILITY, overall_width: 1.650 INCHES NOMINAL IN, overall_height: 1.500 INCHES NOMINAL IN, overall_length: 2.370 INCHES NOMINAL IN, frequency_in_hertz: 60.0 NOMINAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-059-2836, 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
B4-903
NSN: 5945-00-059-2836
FSC: 5945
CAGE: 80089 — EMERSON ELECTRIC CO WHITE-RODGERS DIV (USA)
SPECIFICATIONS
duty_typeCONTINUOUS
thread_class2B SINGLE MOUNTING FACILITY
coil_quantity1
overall_width1.650 INCHES NOMINAL IN
overall_height1.500 INCHES NOMINAL IN
overall_length2.370 INCHES NOMINAL IN
winding_quantity1
frequency_in_hertz60.0 NOMINAL
nominal_thread_size0.138 INCHES SINGLE MOUNTING FACILITY IN
environmental_protectionDUSTPROOF
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
mounting_facility_patternIN-LINE SINGLE MOUNTING FACILITY
NSN5945-00-059-2836
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,ELECTROMAGNETIC TITLE COMPONENT PN B4-903 MFR RELAY,ELECTROMAGNETIC
KEY FEATURES
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS: 250.0 AC
NOMINAL THREAD SIZE: 0.138 INCHES SINGLE MOUNTING FACILITY IN
DUTY TYPE: CONTINUOUS
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP: 120.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
WINDING QUANTITY: 1
MOUNTING FACILITY TYPE AND QUANTITY: 2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
COIL QUANTITY: 1
TECHNICAL CHARACTERISTICS (FLIS)
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS250.0 AC
NOMINAL THREAD SIZE0.138 INCHES SINGLE MOUNTING FACILITY IN
DUTY TYPECONTINUOUS
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP120.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
OVERALL WIDTH1.650 INCHES NOMINAL IN
WINDING QUANTITY1
MOUNTING FACILITY TYPE AND QUANTITY2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
COIL QUANTITY1
MOUNTING FACILITY PATTERNIN-LINE SINGLE MOUNTING FACILITY
NONPILE-UP MAIN CONTACT ARRANGEMENT3 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
84903Interchangeable
interchangeable cross-reference
interchangeable
5310002474196Interchangeable
interchangeable cross-reference
interchangeable
0325286Interchangeable
interchangeable cross-reference
interchangeable
49034HInterchangeable
interchangeable cross-reference
interchangeable
0750-0200Interchangeable
interchangeable cross-reference
interchangeable
0849030005Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B4-903?
B4-903 is a RELAY,ELECTROMAGNETIC.
What parts can replace B4-903?
There are 21 known substitutes for B4-903: 84903, 5310002474196, 0325286 and 18 more. Substitute compatibility should be verified for your specific system.
Is B4-903 still available?
B4-903 is currently cancelled.
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