PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B265Relay,electromagnetic

Lucent Technologies Inc Corporate Headquarters · NSN 5945-00-503-9821 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-503-9821 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-503-9821. Primary manufacturer part number: B265.
Features
  • Relay,electromagnetic — FSC 5945
  • Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY
  • Operating Voltage Rating and Type at Specified Temp: 0.63 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.562 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Environmental Protection: DUSTPROOF
  • Thread Class: 2B SINGLE MOUNTING FACILITY
  • Mounting Facility Type and Quantity: 2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-503-9821, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 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
NSN5945-00-503-9821
Primary Part NumberB265
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerLucent Technologies Inc Corporate Headquarters
StatusACTIVE
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Operating Voltage Rating and Type at Specified Temp0.63 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Center to Center Distance Between Mounting Facilities Parallel to Length0.562 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Environmental ProtectionDUSTPROOF
Thread Class2B SINGLE MOUNTING FACILITY
Mounting Facility Type and Quantity2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Winding DC Resistance Rating50.0 OHMS NOMINAL SINGLE WINDING
Coil Quantity1
Nominal Operating Current Rating and Type10.0 MILLIAMPERES DC SINGLE WINDING
Winding Quantity1
Pile-Up Main Contact Form Arrangement1F
Main Contact Maximum Voltage Rating in Volts50.0 DC
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Terminal Type and Quantity6 PIN ALL FUNCTIONS
Main Contact Load Current Rating at Maximum Rated Voltage1.0 AMPERES DC RESISTIVE LOAD
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Duty TypeCONTINUOUS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3110-00-155-67631311MGF INTERCHANGEABLE
Bearing,ball,annular
Schatz Bearing Corporation Dba Schatz Bearing Corp
4520-00-383-2143B2.65 INTERCHANGEABLE
Heating Element,electrical,nonim
Schneider Electric Usa, Inc.
3455-00-476-0887 INTERCHANGEABLE
Cutter,milling,end
4920-00-868-6722B265 INTERCHANGEABLE
Tool,boresight
Lockheed Martin Corp
6240-01-103-7515 INTERCHANGEABLE
Lamp,incandescent
Cross-Reference Index
Part NumberManufacturer
41925 American Telephone and Telegraph Co (USA)
B265 At and T Corp (USA)
B265 Lucent Technologies Inc Dba Federal Marketing Group (USA)
B265 PRIMARY Lucent Technologies Inc Corporate Headquarters (USA)
41925 Telemechanics Inc (USA)
41925 At and T Corp (USA)
41925 Lucent Technologies Inc Advanced Technology Systems (USA)
B265 American Telephone and Telegraph Co (USA)
Related Parts
3110-00-155-6763INTERCHANGEABLE
BEARING,BALL,ANNULAR
1311MGF
4520-00-383-2143INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
B2.65
3455-00-476-0887INTERCHANGEABLE
CUTTER,MILLING,END
4920-00-868-6722INTERCHANGEABLE
TOOL,BORESIGHT
B265
6240-01-103-7515INTERCHANGEABLE
LAMP,INCANDESCENT

Frequently Asked Questions

What is NSN 5945-00-503-9821?

NSN 5945-00-503-9821 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 5945-00-503-9821?

NSN 5945-00-503-9821 has 8 cross-referenced part numbers: 41925 (American Telephone and Telegraph Co), B265 (At and T Corp), B265 (Lucent Technologies Inc Dba Federal Marketing Group), B265 (Lucent Technologies Inc Corporate Headquarters), 41925 (Telemechanics Inc) and 3 more.

What NSN replaces 5945-00-503-9821?

There are 5 known substitutes for 5945-00-503-9821: 3110-00-155-6763, 4520-00-383-2143, 3455-00-476-0887 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B265?

Key specifications for B265: Overall Height: 1.680 INCHES NOMINAL IN; Overall Length: 4.320 INCHES NOMINAL IN; Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY; Overall Width: 1.180 INCHES NOMINAL IN. 21 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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