PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R39Relay,electromagnetic

Midland-Ross Corp Midtex Div · NSN 5945-00-549-2774 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-549-2774 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-549-2774. Primary manufacturer part number: R39.
Features
  • Relay,electromagnetic — FSC 5945
  • Main Contact Maximum Voltage Rating in Volts: 115.0 AC
  • Operating Voltage Rating and Type at Specified Temp: 115.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
  • Mounting Facility Pattern: RECTANGULAR SINGLE MOUNTING FACILITY
  • Thread Class: 2B SINGLE MOUNTING FACILITY
  • Frequency in Hertz: 50.0 MINIMUM AND 60.0 MAXIMUM
  • Winding DC Resistance Rating: 100.0 OHMS NOMINAL SINGLE WINDING
  • Nominal Thread Size: 0.138 INCHES SINGLE MOUNTING FACILITY IN
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-549-2774, 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 Midland-Ross Corp Midtex Div. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-549-2774
Primary Part NumberR39
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerMidland-Ross Corp Midtex Div
StatusACTIVE
Main Contact Maximum Voltage Rating in Volts115.0 AC
Operating Voltage Rating and Type at Specified Temp115.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Frequency in Hertz50.0 MINIMUM AND 60.0 MAXIMUM
Winding DC Resistance Rating100.0 OHMS NOMINAL SINGLE WINDING
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Coil Quantity1
Center to Center Distance Between Mounting Facilities Parallel to Length1.313 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Center to Center Distance Between Mounting Facilities Parallel to Width0.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Pile-Up Main Contact Form Arrangement4C
Nominal Operating Current Rating and Type1.15 AMPERES AC SINGLE WINDING
Duty TypeINTERMITTENT
Main Contact Load Current Rating at Maximum Rated Voltage10.0 AMPERES AC RESISTIVE LOAD
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Winding Quantity1
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Mounting Facility Type and Quantity4 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Terminal Type and Quantity14 PIN ALL FUNCTIONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5935-00-644-5121101781-01 INTERCHANGEABLE
Connector,receptacle,electrical
Ge Aviation Systems Llc
3010-00-799-447210128765-2 INTERCHANGEABLE
Clutch,slip
Us Army Aviation and Missile Command
3455-01-041-8814716-062468 INTERCHANGEABLE
Cutter,milling,end
Doall Baltimore Company
Cross-Reference Index
Part NumberManufacturer
R39 Midland-Ross Corp Midtex Div
405-0613-000 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
Related Parts
5935-00-644-5121INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
101781-01
3010-00-799-4472INTERCHANGEABLE
CLUTCH,SLIP
10128765-2
3455-01-041-8814INTERCHANGEABLE
CUTTER,MILLING,END
716-062468

Frequently Asked Questions

What is NSN 5945-00-549-2774?

NSN 5945-00-549-2774 is a Relay,electromagnetic, manufactured by Midland-Ross Corp Midtex Div, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-549-2774?

NSN 5945-00-549-2774 has 2 cross-referenced part numbers: R39 (Midland-Ross Corp Midtex Div), 405-0613-000 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).

What NSN replaces 5945-00-549-2774?

There are 3 known substitutes for 5945-00-549-2774: 5935-00-644-5121, 3010-00-799-4472, 3455-01-041-8814. Verify interchangeability with system specifications before substitution.

What are the specifications of R39?

Key specifications for R39: Main Contact Maximum Voltage Rating in Volts: 115.0 AC; Operating Voltage Rating and Type at Specified Temp: 115.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING; Mounting Facility Pattern: RECTANGULAR SINGLE MOUNTING FACILITY; Thread Class: 2B SINGLE MOUNTING FACILITY. 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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