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Technical Data Sheet
121902LM ✓ Verified by PartsTable
· MRO · MRO_GENERAL
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 SWITCH,ROTARY is a the manufacturer industrial component. Key specifications include thread_class: 2B SINGLE MOUNTING FACILITY, overall_width: 1.875 INCHES NOMINAL IN, terminal_type: TAB W/SCREW, overall_height: 1.875 INCHES NOMINAL IN, overall_length: 3.156 INCHES NOMINAL IN, mounting_method: BRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-137-4834, 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
MRO MRO_GENERAL 121902LM
NSN: 5930-00-137-4834
FSC: 5930
CAGE: 82121 — ELECTRO SWITCH CORP. DBA ELECTRO SWITCH CORP (USA)
SPECIFICATIONS
thread_class2B SINGLE MOUNTING FACILITY
overall_width1.875 INCHES NOMINAL IN
terminal_typeTAB W/SCREW
overall_height1.875 INCHES NOMINAL IN
overall_length3.156 INCHES NOMINAL IN
mounting_methodBRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY
style_designatorTAP, CIRCUIT SELECTOR
features_providedACTUATOR KNOB
nominal_thread_size0.190 INCHES SINGLE MOUNTING FACILITY IN
thread_quantity_per_inch24 SINGLE MOUNTING FACILITY
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
mounting_facility_patternFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
NSN5930-00-137-4834
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,ROTARY TITLE COMPONENT PN 121902LM MFR SWITCH,ROTARY
KEY FEATURES
STYLE DESIGNATOR: TAP, CIRCUIT SELECTOR
CONTACT VOLTAGE RATING IN VOLTS: 125.0 AC AT SEA LEVEL
THREAD QUANTITY PER INCH: 24 SINGLE MOUNTING FACILITY
INDIVIDUAL SECTION QUANTITY: 3
SWITCH ACTUATOR MOMENTARY POSITION: CLOCKWISE SINGLE ACTUATOR
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORTAP, CIRCUIT SELECTOR
OVERALL HEIGHT1.875 INCHES NOMINAL IN
CONTACT VOLTAGE RATING IN VOLTS125.0 AC AT SEA LEVEL
OVERALL WIDTH1.875 INCHES NOMINAL IN
THREAD QUANTITY PER INCH24 SINGLE MOUNTING FACILITY
INDIVIDUAL SECTION QUANTITY3
SWITCH ACTUATOR MOMENTARY POSITIONCLOCKWISE SINGLE ACTUATOR
OVERALL LENGTH3.156 INCHES NOMINAL IN
THREAD CLASS2B SINGLE MOUNTING FACILITY
SWITCH ACTUATOR POSITIONING INCREMENT90.0 DEGREES SINGLE ACTUATOR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
71079Interchangeable
interchangeable cross-reference
interchangeable
K-6225Interchangeable
interchangeable cross-reference
interchangeable
C11150Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121902LM?
121902LM is a SWITCH,ROTARY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 121902LM?
There are 3 known substitutes for 121902LM: 71079, K-6225, C11150. Substitute compatibility should be verified for your specific system.
What is the NSN for 121902LM?
121902LM is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-137-4834. This indicates validated use in U.S. government and defense supply chains.
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