Model: T20-89M3

Code Indicating Wheel Switch

Properties:

Hazardous Locations/environmental Protection
Shock resistant and vibration resistant
Overall Length
2.275 inches
Overall Height
1.791 inches
Overall Width
1.156 inches
Unthreaded Mounting Hole Diameter
0.100 inches single mounting facility
Individual Section Quantity
3
Longest Horizontal Distance Between Mounting Centers
2.105 inches single mounting facility
Longest Vertical Distance Between Mounting Centers
0.900 inches single mounting facility
Mounting Method
Bracket single mounting facility and unthreaded hole single mounting facility
Actuator Type
Thumbwheel all actuators
Contact Voltage Rating In Volts
28.0 ac at sea level
Contact Voltage Rating In Volts
28.0 dc at sea level
Mounting Facility Pattern
Four position rectangular single mounting facility
Switch Actuator Indexing Position Quantity
16 all actuators
Terminal Type
Printed circuit
Contact Load Current Rating
125.0 milliamperes resistive load ac at sea level
Contact Load Current Rating
125.0 milliamperes resistive load dc at sea level
Readout Indicator Marking
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f each section
Contact Arrangement Truth Table
Binary code with complement, 2 pole - 16 positions with 2 commons each section
Color
Black each body
Color
Black each indicator background
Color
White each indicator marking
Precious Material And Location
Contact and printed circuit board circuit surfaces gold and contacts silver
Precious Material
Gold and silver
Style Designator
Rectangular inline indicating
NSN
5930-01-124-0166
Part Number
T20-89M3
Description
Switch,code Indicating Wheel
CAGE
01963

A switch which is externally actuated by a thumbwheel and/or pushbutton. A legend or message is visually displayed at each position of the indicating wheel which corresponds to electrically coded output. Electrically coded output is achieved by rotating a set of brush contacts permanently attached to the code indicating wheel, against a stationary commutator which is usually a printed wiring board having electrical pads or contacts which are interconnected by the rotating brush contacts. May have additional electrical components (such as resistors, capacitors, diodes) premounted on that portion of printed wiring board which extends beyond the back of switch housing.

Part T20-89M3 NSN 5930-01-124-0166

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
62415
FIIG:
A052B0
Concept No.:
1
App. Key:
C
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:
G
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

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Schedule B and Export
  • Schedule B: 8536509065
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, for a voltage not exceeding 1000 volts, nesoi

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