Model: BB521-3

Pressure Switch

Special Features:

Bourdon tubes, magnetic mercury switch

Properties:

Overall Height
6.125 inches
Body Diameter
5.750 inches
Unthreaded Mounting Hole Diameter
0.750 inches
Pressure Switch Type
Differential
Mounting Method
Unthreaded hole
Contact Action Stimulus
Decrease
Thread Size
0.250 inches single pressure connection
Contact Load Current Rating
2.5 amperes resistive load first voltage
Contact Load Current Rating
5.0 amperes resistive load second voltage
Contact Adjustability
Deactuation point adjustable and actuation point adjustable
Contact Adjustment Type
External deactuation point knob with scale and external actuation point knob with scale
Contact Stimulus Rating
1.000 differential point pounds per square inch
Contact Voltage Rating In Volts
120.0 ac at sea level second voltage
Contact Voltage Rating In Volts
240.0 ac at sea level first voltage
Pressure Connector Type
External seat-gasket seal, threaded external all connections
Media For Which Designed
Liquid
Style Designator
Cylindrical w/port
NSN
5930-00-629-0301
Part Number
BB521-3
Description
Switch,pressure
CAGE

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 BB521-3 NSN 5930-00-629-0301

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:
CRITL:
X

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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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