PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2107-4Relay,electromagnetic

Te Connectivity Corporation · NSN 5945-00-549-3173 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-549-3173 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-549-3173. Primary manufacturer part number: 2107-4.
Features
  • Relay,electromagnetic — FSC 5945
  • Winding DC Resistance Rating: 145.0 OHMS NOMINAL SINGLE WINDING
  • Thread Class: 2B SINGLE MOUNTING FACILITY
  • Coil Quantity: 1
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Duty Type: CONTINUOUS
  • Mounting Facility Type and Quantity: 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Winding Quantity: 1
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-549-3173, 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 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-549-3173
Primary Part Number2107-4
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerTe Connectivity Corporation
StatusACTIVE
Winding DC Resistance Rating145.0 OHMS NOMINAL SINGLE WINDING
Thread Class2B SINGLE MOUNTING FACILITY
Coil Quantity1
Center to Center Distance Between Mounting Facilities Parallel to Length0.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Duty TypeCONTINUOUS
Mounting Facility Type and Quantity4 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Winding Quantity1
Operating Voltage Rating and Type at Specified Temp115.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Main Contact Maximum Voltage Rating in Volts115.0 AC
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Environmental ProtectionFUNGUS RESISTANT AND WATERTIGHT
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Center to Center Distance Between Mounting Facilities Parallel to Width0.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Pile-Up Main Contact Form Arrangement3A A
Terminal Type and Quantity8 PIN ALL FUNCTIONS
Main Contact Load Current Rating at Maximum Rated Voltage15.0 AMPERES AC RESISTIVE LOAD
Frequency in Hertz60.0 NOMINAL
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-0583643280 INTERCHANGEABLE
Cup,tapered Roller Bearing
Wiggins Lift Co Inc
3110-00-100-4186 INTERCHANGEABLE
Bearing,roller,tapered
4730-00-105-932121074 INTERCHANGEABLE
Strainer Element,sediment
Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div
5962-00-106-42871820-0077 INTERCHANGEABLE
Microcircuit,digital
Hewlett-Packard Company Dba HP
5905-00-259-28352100-0055 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Keysight Technologies Inc
7035-01-095-545121074 INTERCHANGEABLE
Block,filter
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
5962-01-096-4170AD7570 LD/883B INTERCHANGEABLE
Microcircuit,digital
Analog Devices, Inc. Div Corporate Headquarters
4820-01-146-0068WF2-1074 INTERCHANGEABLE
Seat,valve
Malabar
4320-01-290-359621074 INTERCHANGEABLE
Adapter,shaft Subas
Parker Hannifin Corporation Div Hydraulic Systems Division
4810-01-419-167521074-1001-1 INTERCHANGEABLE
Piston,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
2107-4 North American Philips Corp (USA)
2107-4 Te Connectivity Corporation (USA)
A147K34B Virginia Electronics Co Inc (USA)
2107-4 PRIMARY Te Connectivity Corporation (USA)
2107-4 Airpax Corporation Llc Dba Airpax Corporation Llc (USA)
Related Parts
3110-00-100-0583INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
643280
3110-00-100-4186INTERCHANGEABLE
BEARING,ROLLER,TAPERED
4730-00-105-9321INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
21074
5962-00-106-4287INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
1820-0077
5905-00-259-2835INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
2100-0055
7035-01-095-5451INTERCHANGEABLE
BLOCK,FILTER
21074
5962-01-096-4170INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
AD7570 LD/883B
4820-01-146-0068INTERCHANGEABLE
SEAT,VALVE
WF2-1074
4320-01-290-3596INTERCHANGEABLE
ADAPTER,SHAFT SUBAS
21074
4810-01-419-1675INTERCHANGEABLE
PISTON,VALVE
21074-1001-1
7310-01-499-5362INTERCHANGEABLE
GLASS,LOCATOR MILK
21074
4730-01-529-6208INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
21074

Frequently Asked Questions

What is NSN 5945-00-549-3173?

NSN 5945-00-549-3173 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 5945-00-549-3173?

NSN 5945-00-549-3173 has 5 cross-referenced part numbers: 2107-4 (North American Philips Corp), 2107-4 (Te Connectivity Corporation), A147K34B (Virginia Electronics Co Inc), 2107-4 (Te Connectivity Corporation), 2107-4 (Airpax Corporation Llc Dba Airpax Corporation Llc).

What NSN replaces 5945-00-549-3173?

There are 12 known substitutes for 5945-00-549-3173: 3110-00-100-0583, 3110-00-100-4186, 4730-00-105-9321 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2107-4?

Key specifications for 2107-4: Winding DC Resistance Rating: 145.0 OHMS NOMINAL SINGLE WINDING; Thread Class: 2B SINGLE MOUNTING FACILITY; Coil Quantity: 1; Center to Center Distance Between Mounting Facilities Parallel to Length: 0.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN. 23 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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