Model: 121903LB

Rotary Switch

Properties:

Thread Class
2b single mounting facility
Hazardous Locations/environmental Protection
Shock resistant and vibration resistant
Overall Length
3.000 inches
Overall Height
2.719 inches
Overall Width
2.313 inches
Individual Section Quantity
3
Switch Contact Basic Design
Nonpile-up nonsymmetrical
Mounting Facility Circle Radius
1.156 inches single mounting facility
Mounting Method
Bracket single mounting facility and threaded hole single mounting facility
Features Provided
Actuator knob and dummy section
Thready Qty Per Inch (tpi)
24 single mounting facility
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
15.0 amperes resistive load lowest ac voltage rating at sea level and 15.0 amperes inductive load lowest ac voltage rating at sea level
Contact Load Current Rating
2.0 amperes resistive load highest dc voltage rating at sea level and 2.0 amperes inductive load highest dc voltage rating at sea level
Contact Load Current Rating
10.0 amperes resistive load lowest dc voltage rating at sea level and 10.0 amperes inductive load lowest dc voltage rating at sea level
Contact Load Current Rating
5.0 amperes resistive load highest ac voltage rating at sea level and 5.0 amperes inductive load highest ac voltage rating at sea level
Style Designator
Tap, circuit selector
Thread Series Designator
Unc single mounting facility
NSN
5930-01-252-2939
Part Number
121903LB
Description
Switch,rotary
CAGE
82121

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

Part 121903LB NSN 5930-01-252-2939

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
02134
FIIG:
A052B0
Concept No.:
1
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
--
WCC:
72D
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8536509025
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, rotary, rated at over 5 a, for a voltage not exceeding 1,000 volts

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