121903LB

View detailed technical data, stock status, and sourcing information for: 121903LB
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Federal Supply Group

Electrical and Electronic Equipment Components

Federal Supply Classification

5930 Switches

National Stock Number

5930-01-252-2939

Item Name Code

02134

Assigment Date

04/01/1987 (39 years ago)

A switch actuated by a definite angular rotation of the switch shaft about its axis. It consists of a body,switch and a control,rotary switch. For items having rated actuation travel and pressure characteristics, see switch,sensitive. Excludes relay,rotary; switch,stepping; and switch,telephone (as modified).

2.719 inches nominal overall height, 2.313 inches nominal overall width, 3.000 inches nominal overall length, shock resistant and vibration resistant hazardous locations/environmental protection, 2b single mounting facility thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 2b single mounting facility
Hazardous Locations/Environmental Protection: shock resistant and vibration resistant
Overall Length: 3.000 inches nominal
Overall Height: 2.719 inches nominal
Overall Width: 2.313 inches nominal
Individual Section Quantity: 3
Switch Contact Basic Design: nonpile-up nonsymmetrical
Mounting Facility Circle Radius: 1.156 inches nominal single mounting facility
Mounting Method: bracket and threaded hole single mounting facility
Features Provided: actuator knob and dummy section
Thread Quantity Per Inch: 24 single mounting facility
Nominal Thread Size: 0.190 inches single mounting facility
Contact Voltage Rating In Volts: 120.0 lowest dc voltage rating at sea level
Contact Voltage Rating In Volts: 125.0 lowest ac voltage rating at sea level
Contact Voltage Rating In Volts: 350.0 highest dc voltage rating at sea level
Contact Voltage Rating In Volts: 500.0 highest ac voltage rating at sea level
Mounting Facility Pattern: four position circular single mounting facility
Switch Actuator Indexing Position Quantity: 2 single actuator
Terminal Type: tab w/screw
Contact Switching Action: makes before breaks each section periphery
Switch Actuator Positioning Increment: 90.0 degrees single actuator
Contact Load Current Rating: 5.0 amperes resistive load and 5.0 amperes inductive load highest ac voltage rating at sea level
Contact Load Current Rating: 10.0 amperes resistive load and 10.0 amperes inductive load lowest dc voltage rating at sea level
Contact Load Current Rating: 15.0 amperes resistive load and 15.0 amperes inductive load lowest ac voltage rating at sea level
Contact Load Current Rating: 2.0 amperes resistive load and 2.0 amperes inductive load highest dc voltage rating at sea level
Style Designator: tap, circuit selector
Thread Series Designator: unc single mounting facility

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
121903LB	Rotary Switch
1219C3LB	Rotary Switch

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5930-01-252-2939?

The FSCG of the NSN 5930-01-252-2939 is 5930

Does the NSN 5930-01-252-2939 have a Schedule B code assigned?

Yes, the Schedule B code is 8536509025

Does NSN 5930-01-252-2939 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 5930-01-252-2939 contain precious materials?

Item does not contain precious metal.

Does NSN 5930-01-252-2939 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5930-01-252-2939 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Wed, Apr 1, 1987