Model: 2-2557-2

Rotary Switch

Properties:

Thread Class
2a single mounting facility
Thread Length
0.312 inches single mounting facility
Hazardous Locations/environmental Protection
Explosion proof
Overall Length
2.290 inches
First Flat Length
0.250 inches single actuator
Flat Height
0.097 inches single actuator and 0.103 inches single actuator
Shaft Diameter
0.123 inches single actuator and 0.126 inches single actuator
Shaft Length
0.498 inches single actuator
Overall Diameter
0.623 inches
Nonturn Device Radius
0.250 inches at 3: 00 o'clock
Individual Section Quantity
4
Nonturn Device Type
Pin at 3: 00 o'clock
Operating Tempurature Range
-65.0/+125.0 degrees celsius
Switch Contact Basic Design
Nonpile-up symmetrical
Pole Quantity
8 each section rear
Throw Quantity
1 each section rear
Mounting Method
Threaded bushing w/panel seal single mounting facility
Features Provided
Metallic inclosure
Thread Size
0.250 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
22.5 degrees from contact position 1 single actuator
Switch Actuator Indexing Position Quantity
8 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 2nd section rear
Contact Switching Action
Makes before breaks 3rd section rear
Contact Switching Action
Makes before breaks 4th section rear
Switch Actuator Positioning Increment
45.0 degrees single actuator
Contact Load Current Rating
250.0 milliamperes resistive load ac at sea level
Contact Load Current Rating
250.0 milliamperes resistive load dc at sea level and 120.0 milliamperes inductive load dc at sea level
Precious Material And Location
Contacts silver and contact surfaces gold
Precious Material
Silver and gold
Style Designator
Tap, circular, bushing mount
Thread Series Designator
Unef single mounting facility
NSN
5930-01-318-8079
Part Number
2-2557-2
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 2-2557-2 NSN 5930-01-318-8079

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:
C
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: 8536509025
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

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

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