Model: 138-178

Rotary Switch

Properties:

Thread Class
2a single mounting facility
Thread Length
0.375 inches single mounting facility
Overall Length
7.720 inches
Overall Height
2.312 inches
Overall Width
1.750 inches
First Flat Length
0.380 inches single actuator
Flat Height
0.188 inches single actuator
Shaft Diameter
0.250 inches single actuator
Shaft Length
0.745 inches single actuator
Individual Section Quantity
8
Switch Contact Basic Design
Nonpile-up symmetrical
Pole Quantity
1 3rd section front
Pole Quantity
1 4th section front
Pole Quantity
1 5th section front
Pole Quantity
1 6th section front
Pole Quantity
2 1st section front
Pole Quantity
2 2nd section front
Pole Quantity
2 8th section front
Pole Quantity
2 7th section front
Throw Quantity
9 each section rear
Mounting Method
Threaded bushing single mounting facility
Thread Size
0.375 inches single mounting facility
Contact Voltage Rating In Volts
110.0 ac at sea level
Contact Voltage Rating In Volts
28.0 dc at sea level
Rotor Through Connection Quantity
1 3rd section
Rotor Through Connection Quantity
1 4th section
Rotor Through Connection Quantity
1 5th section
Rotor Through Connection Quantity
1 6th section
Rotor Through Connection Quantity
2 1st section
Rotor Through Connection Quantity
2 2nd section
Rotor Through Connection Quantity
2 8th section
Rotor Through Connection Quantity
7 7th section
Switch Actuator Indexing Position Quantity
9 single actuator
Shaft Type
Round, flatted single actuator
Terminal Type
Tab, solder lug
Contact Switching Action
Breaks before makes 1st section rear
Contact Switching Action
Breaks before makes 4th section rear
Contact Switching Action
Breaks before makes 5th section rear
Contact Switching Action
Breaks before makes 2nd section rear
Contact Switching Action
Breaks before makes 6th section rear
Contact Switching Action
Makes before breaks 3rd section rear
Contact Switching Action
Makes before breaks 7th section rear
Contact Switching Action
Makes before breaks 8th section rear
Switch Actuator Positioning Increment
20.0 degrees single actuator
Switch Actuator Stop Device Type
Adjustable stop single actuator
Contact Load Current Rating
2.0 amperes resistive load dc at sea level
Contact Load Current Rating
1.0 amperes resistive load ac at sea level
Precious Material And Location
Contacts and rotor blades silver
Precious Material
Silver
Style Designator
Circular wafer, bushing mount
Thread Series Designator
Unef single mounting facility
NSN
5930-00-084-2630
Part Number
138-178
Description
Switch,rotary
CAGE
17671

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 138-178 NSN 5930-00-084-2630

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:
658
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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