PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R2040RELAYRelay,electromagnetic

Lucent Technologies Inc Corporate Headquarters · NSN 5945-00-503-9813 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-503-9813 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-503-9813. Primary manufacturer part number: R2040RELAY.
Features
  • Relay,electromagnetic — FSC 5945
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Pile-Up Main Contact Form Arrangement: 6A A
  • Mounting Facility Pattern: DIAGONAL SINGLE MOUNTING FACILITY
  • Coil Quantity: 2
  • Environmental Protection: DUSTPROOF
  • Duty Type: CONTINUOUS
  • Mounting Facility Type and Quantity: 2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-503-9813, 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 Lucent Technologies Inc Corporate Headquarters. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-503-9813
Primary Part NumberR2040RELAY
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerLucent Technologies Inc Corporate Headquarters
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Width0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Pile-Up Main Contact Form Arrangement6A A
Mounting Facility PatternDIAGONAL SINGLE MOUNTING FACILITY
Coil Quantity2
Environmental ProtectionDUSTPROOF
Duty TypeCONTINUOUS
Mounting Facility Type and Quantity2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Main Contact Maximum Voltage Rating in Volts50.0 DC
Operating Voltage Rating and Type at Specified Temp8.6 VOLTS DC 25 DEG CELSIUS SECOND WINDING
Center to Center Distance Between Mounting Facilities Parallel to Length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Thread Class2B SINGLE MOUNTING FACILITY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Terminal Type and Quantity16 PIN ALL FUNCTIONS
Nominal Operating Current Rating and Type0.03 AMPERES DC ALL WINDINGS
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Winding DC Resistance Rating275.0 OHMS NOMINAL FIRST WINDING
Main Contact Load Current Rating at Maximum Rated Voltage1.0 AMPERES DC RESISTIVE LOAD
Winding Quantity2
Operating Voltage Rating and Type at Specified Temp12.4 VOLTS DC 25 DEG CELSIUS FIRST WINDING
Winding DC Resistance Rating300.0 OHMS NOMINAL SECOND WINDING
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5961-00-481-69641N3620R INTERCHANGEABLE
Semiconductor Device,diode
Semitronics Corp
Cross-Reference Index
Part NumberManufacturer
R2040 Lucent Technologies Inc Corporate Headquarters (USA)
R2040RELAY American Telephone and Telegraph Co (USA)
R2040 At and T Corp (USA)
R2040 American Telephone and Telegraph Co (USA)
R2040RELAY PRIMARY Lucent Technologies Inc Corporate Headquarters (USA)
R2040RELAY Lucent Technologies Inc Dba Federal Marketing Group (USA)
R2040 Lucent Technologies Inc Dba Federal Marketing Group (USA)
Related Parts
5961-00-481-6964INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3620R

Frequently Asked Questions

What is NSN 5945-00-503-9813?

NSN 5945-00-503-9813 is a Relay,electromagnetic, manufactured by Lucent Technologies Inc Corporate Headquarters, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-503-9813?

NSN 5945-00-503-9813 has 7 cross-referenced part numbers: R2040 (Lucent Technologies Inc Corporate Headquarters), R2040RELAY (American Telephone and Telegraph Co), R2040 (At and T Corp), R2040 (American Telephone and Telegraph Co), R2040RELAY (Lucent Technologies Inc Corporate Headquarters) and 2 more.

What NSN replaces 5945-00-503-9813?

There is 1 known substitute for 5945-00-503-9813: 5961-00-481-6964. Verify interchangeability with system specifications before substitution.

What are the specifications of R2040RELAY?

Key specifications for R2040RELAY: Center to Center Distance Between Mounting Facilities Parallel to Width: 0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Pile-Up Main Contact Form Arrangement: 6A A; Mounting Facility Pattern: DIAGONAL SINGLE MOUNTING FACILITY; Coil Quantity: 2. 24 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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