Model: 1-1957ML-4-4NP

Rotary Switch

Properties:

Thread Class
2a single mounting facility
Thread Length
0.430 inches single mounting facility
Hazardous Locations/environmental Protection
Explosion proof
Overall Length
3.250 inches
First Flat Length
0.250 inches single actuator
Flat Height
0.210 inches single actuator
Shaft Diameter
0.250 inches single actuator
Shaft Length
0.370 inches single actuator
Overall Diameter
1.300 inches
Individual Section Quantity
4
End Application
Sonar set an/bqq-5
Switch Contact Basic Design
Nonpile-up symmetrical
Pole Quantity
1 each section front
Throw Quantity
4 each 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
1 each 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 each section rear
Switch Actuator Positioning Increment
60.0 degrees single actuator
Contact Load Current Rating
3.0 amperes resistive load dc at sea level and 2.0 amperes inductive load dc at sea level
Contact Load Current Rating
5.0 amperes resistive load ac at sea level
Style Designator
Tap, circular, bushing mount
Thread Series Designator
Unef single mounting facility
NSN
5930-01-237-9963
Part Number
1-1957ML-4-4NP
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 1-1957ML-4-4NP NSN 5930-01-237-9963

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:
5.0 X 3.0 X 3.0
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: 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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