PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121902LMSwitch,rotary

Electro Switch Corp. Dba Electro Switch Corp · NSN 5930-00-137-4834 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-137-4834 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-137-4834. Primary manufacturer part number: 121902LM.
Features
  • Switch,rotary — FSC 5930
  • 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
  • Thread Class: 2B SINGLE MOUNTING FACILITY
  • Switch Actuator Positioning Increment: 90.0 DEGREES SINGLE ACTUATOR
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,rotary, cataloged under National Stock Number 5930-00-137-4834, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Electro Switch Corp. Dba Electro Switch Corp. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5930-00-137-4834
Primary Part Number121902LM
Item NameSwitch,rotary
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerElectro Switch Corp. Dba Electro Switch Corp
StatusACTIVE
Style DesignatorTAP, CIRCUIT SELECTOR
Contact Voltage Rating in Volts125.0 AC AT SEA LEVEL
Thread Quantity Per Inch24 SINGLE MOUNTING FACILITY
Individual Section Quantity3
Switch Actuator Momentary PositionCLOCKWISE SINGLE ACTUATOR
Thread Class2B SINGLE MOUNTING FACILITY
Switch Actuator Positioning Increment90.0 DEGREES SINGLE ACTUATOR
Mounting Facility PatternFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
Mounting MethodBRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY
Terminal TypeTAB W/SCREW
Features ProvidedACTUATOR KNOB
Switch Actuator Indexing Position Quantity3 SINGLE ACTUATOR
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Contact Load Current Rating10.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
Switch Contact Basic DesignNONPILE-UP NONSYMMETRICAL
Nominal Thread Size0.190 INCHES SINGLE MOUNTING FACILITY IN
Mounting Facility Circle Radius1.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-812-81479174272 INTERCHANGEABLE
Transformer,power
Us Army Aviation and Missile Command
Cross-Reference Index
Part NumberManufacturer
C11150 Electro Switch Corp. Dba Electro Switch Corp (USA)
121902LM PRIMARY Electro Switch Corp. Dba Electro Switch Corp (USA)
Related Parts
5950-00-812-8147INTERCHANGEABLE
TRANSFORMER,POWER
9174272

Frequently Asked Questions

What is NSN 5930-00-137-4834?

NSN 5930-00-137-4834 is a Switch,rotary, manufactured by Electro Switch Corp. Dba Electro Switch Corp, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-137-4834?

NSN 5930-00-137-4834 has 2 cross-referenced part numbers: C11150 (Electro Switch Corp. Dba Electro Switch Corp), 121902LM (Electro Switch Corp. Dba Electro Switch Corp).

What NSN replaces 5930-00-137-4834?

There is 1 known substitute for 5930-00-137-4834: 5950-00-812-8147. Verify interchangeability with system specifications before substitution.

What are the specifications of 121902LM?

Key specifications for 121902LM: Style Designator: TAP, CIRCUIT SELECTOR; Overall Height: 1.875 INCHES NOMINAL IN; Contact Voltage Rating in Volts: 125.0 AC AT SEA LEVEL; Overall Width: 1.875 INCHES NOMINAL IN. 21 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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