Model: 21557-4-1-1

Thermostatic Switch

Properties:

Thread Length
0.390 inches single threaded bushing
Overall Length
3.120 inches
Body Diameter
0.290 inches
Body Length
2.000 inches
Tempurature Sensing Element Type
Internal sensor
Width Across Flats
0.750 inches
Mounting Method
Threaded bushing
Features Provided
Tamper proof cap
Thready Qty Per Inch (tpi)
27 single threaded bushing
Contact Action Stimulus
Increase
Thread Size
0.125 inches single threaded bushing
Nonpile-up Contact Arrangement
1 pole, single throw, normally closed, momentary action
Terminal Type
Connector, receptacle
Contact Load Current Rating
1.0 amperes resistive load first voltage
Contact Load Current Rating
1.0 amperes resistive load second voltage
Contact Adjustability
Deactuation point not adjustable and actuation point not adjustable
Contact Stimulus Rating
85.00 actuation point degrees celsius and 80.00 deactuation point degrees celsius and 5.00 differential point degrees celsius
Contact Voltage Rating In Volts
115.0 ac at sea level first voltage
Contact Voltage Rating In Volts
30.0 dc at sea level second voltage
Media For Which Designed
Gas or liquid
Style Designator
Cylindrical w/flange
Thread Series Designator
Npt single threaded bushing
NSN
5930-00-764-2906
Part Number
21557-4-1-1
Description
Switch,thermostatic
CAGE
82647

A switch that is actuated by changes in ambient temperature. Excludes circuit breaker; control, temperature (as modified); fuse (as modified); protector, thermal-overload, electrical motor; relay, thermal; and thermostat, flow control. See also control, temperature (as modified) and regulator, temperature (as modified).

Part 21557-4-1-1 NSN 5930-00-764-2906

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00451
FIIG:
A048B0
Concept No.:
1
App. Key:
F
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

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:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 9032100000
  • SITC: 87461
  • End Use: Measuring, testing, control instruments
  • NAICS: 334512
  • USDA: 1

Freight Class: Thermostats

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