PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

Y131Relay,electromagnetic

American Telephone and Telegraph Co · NSN 5945-00-518-7087 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-518-7087 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-518-7087. Primary manufacturer part number: Y131.
Features
  • Relay,electromagnetic — FSC 5945
  • Winding Quantity: 1
  • Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY
  • Mounting Facility Pattern: DIAGONAL SINGLE MOUNTING FACILITY
  • Nominal Operating Current Rating and Type: 50.0 MILLIAMPERES DC SINGLE WINDING
  • Main Contact Maximum Voltage Rating in Volts: 50.0 DC
  • Environmental Protection: DUSTPROOF
  • Terminal Type and Quantity: 9 PIN ALL FUNCTIONS
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-518-7087, is classified within Federal Supply Class 5945 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is American Telephone and Telegraph Co. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-518-7087
Primary Part NumberY131
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerAmerican Telephone and Telegraph Co
StatusACTIVE
Winding Quantity1
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Mounting Facility PatternDIAGONAL SINGLE MOUNTING FACILITY
Nominal Operating Current Rating and Type50.0 MILLIAMPERES DC SINGLE WINDING
Main Contact Maximum Voltage Rating in Volts50.0 DC
Environmental ProtectionDUSTPROOF
Terminal Type and Quantity9 PIN ALL FUNCTIONS
Mounting Facility Type and Quantity2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Center to Center Distance Between Mounting Facilities Parallel to Width0.312 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Center to Center Distance Between Mounting Facilities Parallel to Length0.438 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Pile-Up Main Contact Form Arrangement2A1C
Winding DC Resistance Rating235.0 OHMS NOMINAL SINGLE WINDING
Main Contact Load Current Rating at Maximum Rated Voltage500.0 MILLIAMPERES DC RESISTIVE LOAD
Operating Voltage Rating and Type at Specified Temp14.6 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Duty TypeCONTINUOUS
Coil Quantity1
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6220-00-299-39994017 INTERCHANGEABLE
Lamp Unit,vehicular
Ktm 2 Llc Dba Arrow Safety Device Company
5340-00-399-183042092 INTERCHANGEABLE
Bracket,angle
Hamilton Watch Co Inc
5930-00-881-971142092 INTERCHANGEABLE
Switch,pressure
Hydra-Electric Company Dba Hydra-Electric Co
4820-01-239-031649229 INTERCHANGEABLE
Stem,fluid Valve
Leslie Controls, Inc. Dba Leslie Controls Inc
5331-01-640-968942092 INTERCHANGEABLE
O-Ring
Exlar Corporation
Cross-Reference Index
Part NumberManufacturer
Y131 American Telephone and Telegraph Co (USA)
Y131RELAY Lucent Technologies Inc Corporate Headquarters (USA)
Y131 Lucent Technologies Inc Corporate Headquarters (USA)
Y131RELAY American Telephone and Telegraph Co (USA)
42092 At and T Corp (USA)
42092 American Telephone and Telegraph Co (USA)
Y131 At and T Corp (USA)
42092 Telemechanics Inc (USA)
42092 Lucent Technologies Inc Advanced Technology Systems (USA)
Related Parts
6220-00-299-3999INTERCHANGEABLE
LAMP UNIT,VEHICULAR
4017
5340-00-399-1830INTERCHANGEABLE
BRACKET,ANGLE
42092
5930-00-881-9711INTERCHANGEABLE
SWITCH,PRESSURE
42092
4820-01-239-0316INTERCHANGEABLE
STEM,FLUID VALVE
49229
5331-01-640-9689INTERCHANGEABLE
O-RING
42092

Frequently Asked Questions

What is NSN 5945-00-518-7087?

NSN 5945-00-518-7087 is a Relay,electromagnetic, manufactured by American Telephone and Telegraph Co, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-518-7087?

NSN 5945-00-518-7087 has 9 cross-referenced part numbers: Y131 (American Telephone and Telegraph Co), Y131RELAY (Lucent Technologies Inc Corporate Headquarters), Y131 (Lucent Technologies Inc Corporate Headquarters), Y131RELAY (American Telephone and Telegraph Co), 42092 (At and T Corp) and 4 more.

What NSN replaces 5945-00-518-7087?

There are 5 known substitutes for 5945-00-518-7087: 6220-00-299-3999, 5340-00-399-1830, 5930-00-881-9711 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of Y131?

Key specifications for Y131: Overall Width: 1.430 INCHES NOMINAL IN; Winding Quantity: 1; Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY; Overall Length: 4.530 INCHES NOMINAL IN. 22 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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