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LB63945 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
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: 2.500 INCHES NOMINAL IN, overall_height: 2.000 INCHES NOMINAL IN, overall_length: 3.060 INCHES NOMINAL IN, frequency_in_hertz: 60.0 NOMINAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-070-9469, 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
LB63945
NSN: 3120-00-070-9469
FSC: 3120
CAGE: 0BR59 — SIEMENS GOVERNMENT TECHNOLOGIES, INC. DBA SGT DRESSER-RAND DIV SGT DRESSER-RAND (USA)
SPECIFICATIONS
duty_typeCONTINUOUS
thread_class2B SINGLE MOUNTING FACILITY
coil_quantity1
overall_width2.500 INCHES NOMINAL IN
overall_height2.000 INCHES NOMINAL IN
overall_length3.060 INCHES NOMINAL IN
winding_quantity1
frequency_in_hertz60.0 NOMINAL
nominal_thread_size0.138 INCHES SINGLE MOUNTING FACILITY IN
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
mounting_facility_patternTRIANGLE SINGLE MOUNTING FACILITY
winding_dc_resistance_rating350.0 OHMS NOMINAL SINGLE WINDING
NSN3120-00-070-9469
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: LB63945 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
6394Interchangeable
interchangeable cross-reference
interchangeable
B31767ISSUE1Interchangeable
interchangeable cross-reference
interchangeable
6394-5Interchangeable
interchangeable cross-reference
interchangeable
00400048 ITEM 5Interchangeable
interchangeable cross-reference
interchangeable
38252Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LB63945?
LB63945 is a RELAY,ELECTROMAGNETIC.
What parts can replace LB63945?
There are 5 known substitutes for LB63945: 6394, B31767ISSUE1, 6394-5 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LB63945?
LB63945 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-070-9469. 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