Model: 49-1957-1B4

Rotary Switch

Properties:

Thread Class
2a single mounting facility
Thread Length
0.437 inches single mounting facility
Hazardous Locations/environmental Protection
Explosion proof
Overall Length
1.967 inches
First Flat Length
0.375 inches single actuator
Flat Height
0.210 inches single actuator
Shaft Diameter
0.248 inches single actuator and 0.252 inches single actuator
Shaft Length
0.937 inches single actuator
Overall Diameter
1.170 inches
Individual Section Quantity
1
Nonturn Device Type
Slotted bushing at 3: 00 o'clock
Switch Contact Basic Design
Nonpile-up symmetrical
Pole Quantity
2 single section front
Throw Quantity
4 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 dc at sea level
Shaft Flat/slot Angular Location
180.0 degrees from contact position 1 single actuator
Rotor Through Connection Quantity
2 single section
Switch Actuator Indexing Position Quantity
4 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
45.0 degrees single actuator
Switch Actuator Stop Device Type
Fixed stop single actuator
Contact Load Current Rating
2.0 amperes resistive load ac at sea level
Contact Load Current Rating
1.0 amperes resistive load dc at sea level
Style Designator
Tap, circular, bushing mount
Thread Series Designator
Unef single mounting facility
NSN
5930-00-142-8030
Part Number
49-1957-1B4
Description
Switch,rotary
CAGE
91812

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 49-1957-1B4 NSN 5930-00-142-8030

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:
U
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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