Model: 21991

Rotary Switch

Properties:

Thread Class
2a single mounting facility
Thread Length
0.375 inches single mounting facility
Overall Length
1.500 inches
Overall Height
1.875 inches
Overall Width
1.625 inches
First Flat Length
0.281 inches single actuator and 0.312 inches single actuator
Flat Height
0.200 inches single actuator
Shaft Diameter
0.250 inches single actuator
Shaft Length
0.500 inches single actuator
Nonturn Device Radius
0.531 inches at 6: 00 o'clock
Individual Section Quantity
1
Nonturn Device Type
Tab at 6: 00 o'clock
Switch Contact Basic Design
Nonpile-up symmetrical
Pole Quantity
4 single section rear
Throw Quantity
2 single section rear
Mounting Method
Threaded bushing single mounting facility
Thread Size
0.375 inches single mounting facility
Contact Voltage Rating In Volts
115.0 ac at sea level
Contact Voltage Rating In Volts
28.0 highest dc voltage rating at sea level
Contact Voltage Rating In Volts
6.0 lowest dc voltage rating at sea level
Switch Actuator Momentary Position
Clockwise single actuator
Switch Actuator Indexing Position Quantity
2 single actuator
Shaft Type
Round, flatted single actuator
Terminal Type
Tab, solder lug
Contact Switching Action
Breaks before makes single section rear
Switch Actuator Positioning Increment
30.0 degrees single actuator
Switch Actuator Stop Device Type
Fixed stop single actuator
Contact Load Current Rating
1.7 amperes resistive load highest dc voltage rating at sea level
Contact Load Current Rating
350.0 milliamperes resistive load ac at sea level
Contact Load Current Rating
5.5 amperes resistive load lowest dc voltage rating at sea level
Precious Material And Location
Contact and rotor blade surfaces silver
Precious Material
Silver
Style Designator
Circular wafer, bushing mount
Thread Series Designator
Unef single mounting facility
NSN
5930-01-171-5543
Part Number
21991
Description
Switch,rotary
CAGE
34162

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 21991 NSN 5930-01-171-5543

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:
S
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
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: 8536509020
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

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

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