PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

75904172ZRelay,electromagnetic

Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · NSN 5945-00-255-1128 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-255-1128 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-255-1128. Primary manufacturer part number: 75904172Z.
Features
  • Relay,electromagnetic — FSC 5945
  • Duty Type: CONTINUOUS
  • Nominal Operating Current Rating and Type: 50.0 MILLIAMPERES DC SINGLE WINDING
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
  • Coil Quantity: 1
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY
  • Winding DC Resistance Rating: 550.0 OHMS NOMINAL SINGLE WINDING
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-255-1128, 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 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-255-1128
Primary Part Number75904172Z
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerUs Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
StatusCANCELLED
Duty TypeCONTINUOUS
Nominal Operating Current Rating and Type50.0 MILLIAMPERES DC SINGLE WINDING
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Coil Quantity1
Center to Center Distance Between Mounting Facilities Parallel to Length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Winding DC Resistance Rating550.0 OHMS NOMINAL SINGLE WINDING
Thread Class2B SINGLE MOUNTING FACILITY
Center to Center Distance Between Mounting Facilities Parallel to Width0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Nominal Thread Size0.112 INCHES SINGLE MOUNTING FACILITY IN
Pile-Up Main Contact Form Arrangement1A A
Terminal Type and Quantity4 PIN ALL FUNCTIONS
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Mounting Facility Type and Quantity4 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Winding Quantity1
Main Contact Load Current Rating at Maximum Rated Voltage50.0 MILLIAMPERES DC RESISTIVE LOAD
Operating Voltage Rating and Type at Specified Temp27.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Main Contact Maximum Voltage Rating in Volts300.0 DC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5945-00-227-7008 INTERCHANGEABLE
Relay,electromagnetic
6135-00-643-1311R40 INTERCHANGEABLE
Battery,nonrechargeable
American National Standards Institute Incorporated Dba American National Standards Institute
5945-00-847-7952600-0030-101 INTERCHANGEABLE
Relay,electromagnetic
Applied Biosystems, Llc Dba Life Technologies
6675-00-982-1977823 INTERCHANGEABLE
Template,drafting
Airmate Co., Inc.
5120-01-109-554613208 INTERCHANGEABLE
Socket,socket Wrench
W. S. Spotswood & Sons, Inc. Dba Govtools
3455-01-116-6023 INTERCHANGEABLE
File,rotary
3990-01-232-0881R-40 INTERCHANGEABLE
Binder,load
Ratcliff Hoist Co
3439-01-302-7225 INTERCHANGEABLE
Soldering Iron,electric
6240-01-436-8820120WBR40/FL INTERCHANGEABLE
Lamp,incandescent
Altman Stage Lighting Co
8145-01-727-2750R40 INTERCHANGEABLE
Shipping and Storage Container,m
Pelican Products, Inc. Dba Pelican Products Inc
Cross-Reference Index
Part NumberManufacturer
G55298 Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co (USA)
MH3072 Te Connectivity Corporation (USA)
972-1173-00 Cardwell Condenser Corp Lapointe-Admiral Div (USA)
RDN3-1AF General Electronic Devices (USA)
R40 Midland-Ross Corp Midtex Div
75904172Z PRIMARY Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
972-1173-00 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
R40 Gte Communication Systems Corp (USA)
R40 Auto Electric Co (USA)
Related Parts
5945-00-227-7008INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
6135-00-643-1311INTERCHANGEABLE
BATTERY,NONRECHARGEABLE
R40
5945-00-847-7952INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
600-0030-101
6675-00-982-1977INTERCHANGEABLE
TEMPLATE,DRAFTING
823
5120-01-109-5546INTERCHANGEABLE
SOCKET,SOCKET WRENCH
13208
3455-01-116-6023INTERCHANGEABLE
FILE,ROTARY
3990-01-232-0881INTERCHANGEABLE
BINDER,LOAD
R-40
3439-01-302-7225INTERCHANGEABLE
SOLDERING IRON,ELECTRIC
6240-01-436-8820INTERCHANGEABLE
LAMP,INCANDESCENT
120WBR40/FL
8145-01-727-2750INTERCHANGEABLE
SHIPPING AND STORAGE CONTAINER,M
R40

Frequently Asked Questions

What is NSN 5945-00-255-1128?

NSN 5945-00-255-1128 is a Relay,electromagnetic, manufactured by Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-255-1128?

NSN 5945-00-255-1128 has 9 cross-referenced part numbers: G55298 (Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co), MH3072 (Te Connectivity Corporation), 972-1173-00 (Cardwell Condenser Corp Lapointe-Admiral Div), RDN3-1AF (General Electronic Devices), R40 (Midland-Ross Corp Midtex Div) and 4 more.

What NSN replaces 5945-00-255-1128?

There are 10 known substitutes for 5945-00-255-1128: 5945-00-227-7008, 6135-00-643-1311, 5945-00-847-7952 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 75904172Z?

Key specifications for 75904172Z: Duty Type: CONTINUOUS; Nominal Operating Current Rating and Type: 50.0 MILLIAMPERES DC SINGLE WINDING; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY; Coil Quantity: 1. 21 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-255-1128 still in active supply?

NSN 5945-00-255-1128 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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