Model: 4989

Sensitive Switch

Special Features:

Weapon system essential

Properties:

Body Style
Hole mounted
Hazardous Locations/environmental Protection
Dustproof
Overall Length
2.110 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
1.000 inches
Overall Width
0.688 inches
Body Length
1.938 inches
Body Width
0.688 inches
Body Height
1.938 inches
Unthreaded Mounting Hole Diameter
0.140 inches
Actuator Style
Roller arm
Actuator Free Position Height
1.188 inches
Actuator Roller Diameter
0.375 inches
Actuator Roller Width
0.156 inches
Maximum Voltage Rating In Volts
230.0 ac
End Application
Nuclear power plants.
Inclosure Type
Fully enclosed
Mounting Method
Unthreaded hole
Nonpile-up Contact Arrangement
1 pole, double throw, both positions maintained single switch unit
Switch Release Force
0.7 ounces
Criticality Code Justification
Feat
Switch Actuating Force
3.5 ounces
Actuator Movement
Between 0.218 pretravel inches and 0.156 overtravel inches and 0.040 differential inches
Contact Load Current Rating At Maximum Rated Voltage
5.000 amperes resistive ac
Precious Material And Location
Contacts silver
Terminal Type And Quantity
3 screw
NSN
5930-00-978-9008
Part Number
4989
Description
Switch,sensitive
CAGE
87009

A switch with a quick-acting mechanism actuated by a highly delicate tactile contact. Includes membrane switch. excludes switch, flexible; switch, pressure; and switch, thermostatic.

Part 4989 NSN 5930-00-978-9008

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00399
FIIG:
A053A0
Concept No.:
App. Key:
S
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:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
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: 8536509050
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, slide, for a voltage not exceeding 1,000 v

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