Model: 3978-1

Pressure Switch

Properties:

Thread Class
2b single pressure connection
Hazardous Locations/environmental Protection
Explosion proof
Overall Length
3.250 inches
Overall Height
3.000 inches
Overall Width
1.250 inches
Unthreaded Mounting Hole Diameter
0.210 inches
Distance Between Mounting Facility Centers
1.125 inches
Pressure Switch Type
Gage
Operating Tempurature Rating
Between -65.0 degrees fahrenheit and 180.0 degrees fahrenheit
Mounting Method
Base and unthreaded hole
Features Provided
Electrical access port
Contact Action Stimulus
Increase
Proof Pressure
7500.00 pounds per square inch
Thread Size
0.4375 inches single pressure connection
Mounting Facility Pattern
Two position in-line
Nonpile-up Contact Arrangement
4 pole, double throw, double break/double make, permanent jumper, one position momentary
Terminal Type
Connector, receptacle
Contact Load Current Rating
3.0 amperes resistive load first voltage and 3.0 amperes inductive load first voltage and 3.0 amperes motor load first voltage
Contact Load Current Rating
3.0 amperes resistive load second voltage and 3.0 amperes inductive load second voltage and 3.0 amperes motor load second voltage
Contact Load Current Rating
3.0 amperes resistive load third voltage and 3.0 amperes inductive load third voltage and 3.0 amperes motor load third voltage
Contact Adjustability
Deactuation point not adjustable and actuation point not adjustable
Contact Stimulus Rating
1800.00 actuation point pounds per square inch and 1500.00 deactuation point pounds per square inch and 300.00 differential point pounds per square inch
Contact Voltage Rating In Volts
115.0 ac at sea level second voltage
Contact Voltage Rating In Volts
200.0 ac at sea level first voltage
Contact Voltage Rating In Volts
28.0 dc at sea level third voltage
Pressure Connector Type
Plain, threaded internal single connection
Frequency In Hertz
400.0 first voltage
Frequency In Hertz
400.0 second voltage
Media For Which Designed
Liquid
Style Designator
Rectangular
Thread Series Designator
Unf single pressure connection
NSN
5930-00-800-8492
Part Number
3978-1
Description
Switch,pressure
CAGE
98087

A switch which is actuated by changes in pressure of any gas or liquid or by changes in a vacuum acting upon its sensing element. Excludes baroswitch; switch, pressure-thermostatic; and switch, sensitive.

Part 3978-1 NSN 5930-00-800-8492

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00206
FIIG:
A048B0
Concept No.:
1
App. Key:
D
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:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.6000lbs
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

End Items End applications NSN 5930-00-800-8492 is a component of

  • T-37 Aircraft
  • T-38 Aircraft
  • C-5 Aircraft Support Equipment

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Schedule B and Export
  • Schedule B: 8536509065
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, for a voltage not exceeding 1000 volts, nesoi

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