PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LS-7721Relay,electromagnetic

Te Connectivity Corporation · NSN 5945-01-218-5428 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-01-218-5428 — this item is cataloged by the U.S. Government under National Stock Number 5945-01-218-5428. Primary manufacturer part number: LS-7721.
Features
  • Relay,electromagnetic — FSC 5945
  • Cubic Measure: 0.136 CUBIC INCHES
  • Main Contact Load Current Rating at Maximum Rated Voltage: 750.0 MILLIAMPERES DC INDUCTIVE LOAD
  • Winding DC Resistance Rating: 254.0 OHMS NOMINAL SINGLE WINDING
  • Storage Type: GENERAL PURPOSE WAREHOUSE
  • Arc Quenching Method: AIR
  • Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Time Delay: 0.005 SECONDS MAXIMUM FIXED OPERATE TIME
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-01-218-5428, 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 Te Connectivity Corporation. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-01-218-5428
Primary Part NumberLS-7721
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerTe Connectivity Corporation
StatusACTIVE
Cubic Measure0.136 CUBIC INCHES
Main Contact Load Current Rating at Maximum Rated Voltage750.0 MILLIAMPERES DC INDUCTIVE LOAD
Winding DC Resistance Rating254.0 OHMS NOMINAL SINGLE WINDING
Storage TypeGENERAL PURPOSE WAREHOUSE
Arc Quenching MethodAIR
Nonpile-Up Main Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Time Delay0.005 SECONDS MAXIMUM FIXED OPERATE TIME
Operating Voltage Rating and Type at Specified Temp12.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Mounting Facility Type and Quantity1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY
Coil Quantity1
Fragility FactorMODERATELY RUGGED
Environmental ProtectionHERMETIC
Terminal Type and Quantity8 PIN ALL FUNCTIONS
Purpose for Which DesignedGENERAL
Winding Quantity1
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Main Contact Load Current Rating at Maximum Rated Voltage150.0 MILLIAMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD
Duty TypeCONTINUOUS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5365-00-197-52592100-1464631PC33 INTERCHANGEABLE
Spacer,ring
Naval Ship Systems Command
5960-00-760-08654552 INTERCHANGEABLE
Electron Tube
Photonis Defense Inc Dba Photonis Defense Inc
6240-00-954-5499 INTERCHANGEABLE
Lamp,incandescent
2920-01-076-4389 INTERCHANGEABLE
Drive,engine,electrical Starter
4420-01-135-68594555 INTERCHANGEABLE
Heat Exchanger,shipboard
Howell Laboratories Inc Dba Howell Laboratories Inc
5120-01-174-4048004555 INTERCHANGEABLE
Wrench,compression
Bauer Compressors, Inc.
6625-01-565-19964555 INTERCHANGEABLE
Test Clip,minigrab,
Fluke Electronics Corp
Cross-Reference Index
Part NumberManufacturer
4555 Branson Corp (USA)
4555 Te Connectivity Corporation (USA)
LS-7721 PRIMARY Te Connectivity Corporation (USA)
4555 Te Connectivity Corporation (USA)
LS-7721 Branson Corp (USA)
LS-7721 Te Connectivity Corporation (USA)
Related Parts
5365-00-197-5259INTERCHANGEABLE
SPACER,RING
2100-1464631PC33
5960-00-760-0865INTERCHANGEABLE
ELECTRON TUBE
4552
6240-00-954-5499INTERCHANGEABLE
LAMP,INCANDESCENT
2920-01-076-4389INTERCHANGEABLE
DRIVE,ENGINE,ELECTRICAL STARTER
4420-01-135-6859INTERCHANGEABLE
HEAT EXCHANGER,SHIPBOARD
4555
5120-01-174-4048INTERCHANGEABLE
WRENCH,COMPRESSION
004555
6625-01-565-1996INTERCHANGEABLE
TEST CLIP,MINIGRAB,
4555

Frequently Asked Questions

What is NSN 5945-01-218-5428?

NSN 5945-01-218-5428 is a Relay,electromagnetic, manufactured by Te Connectivity Corporation, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-01-218-5428?

NSN 5945-01-218-5428 has 6 cross-referenced part numbers: 4555 (Branson Corp), 4555 (Te Connectivity Corporation), LS-7721 (Te Connectivity Corporation), 4555 (Te Connectivity Corporation), LS-7721 (Branson Corp) and 1 more.

What NSN replaces 5945-01-218-5428?

There are 7 known substitutes for 5945-01-218-5428: 5365-00-197-5259, 5960-00-760-0865, 6240-00-954-5499 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of LS-7721?

Key specifications for LS-7721: Cubic Measure: 0.136 CUBIC INCHES; Main Contact Load Current Rating at Maximum Rated Voltage: 750.0 MILLIAMPERES DC INDUCTIVE LOAD; Winding DC Resistance Rating: 254.0 OHMS NOMINAL SINGLE WINDING; Storage Type: GENERAL PURPOSE WAREHOUSE. 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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