Model: 257B

Electromagnetic Relay

Special Features:

Arc quenching method: hydrogen

Properties:

Overall Length
3.180 inches
Overall Diameter
1.280 inches
Environmental Protection
Hermetic
Winding Quantity
1
Coil Quantity
1
Winding Dc Resistance Rating
4.0 kilohms single winding
Duty Type
Continuous
Mounting Facility Type And Quantity
1 plug-in terminal single mounting facility
Nonpile-up Main Contact Arrangement
1 pole, double throw, one position momentary
Operating Current Rating And Type
8.1 milliamperes dc single winding
Main Contact Load Current Rating At Maximum Rated Voltage
5.0 amperes ac resistive load and 500.0 milliamperes dc resistive load
Main Contact Maximum Voltage Rating In Volts
50.0 ac and 500.0 dc
Terminal Type And Quantity
5 pin all functions
NSN
5945-00-247-8364
Part Number
257B
Description
Relay,electromagnetic
CAGE
70408

A relay which is actuated by the effect of a magnetic field developed by the current in its energizing coil(s). Includes solenoid and armature types. Excludes contactor, magnetic; relay, meter movement; relay, motor driven; relay, reed; relay, resonant reed; relay, rotary; and switch, stepping.

Part 257B NSN 5945-00-247-8364

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
32512
FIIG:
A03300
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:
N
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:
0.3000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
ZZ
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
77.5
WCC:
72D
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8536490050
  • SITC: 77254
  • End Use: Electric apparatus
  • NAICS: 335314
  • USDA: 1

Freight Class: Relays, electromechanical, with contacts rated at less than 10 a, for a voltage exceeding 60 v but not exceeding 1000 v

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