PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HMD5-4C425Relay,electromagnetic

Relays Inc · NSN 5945-00-539-2942 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-539-2942 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-539-2942. Primary manufacturer part number: HMD5-4C425.
Features
  • Relay,electromagnetic — FSC 5945
  • Main Contact Maximum Voltage Rating in Volts: 115.0 AC AND 28.0 DC
  • Center to Center Distance Between Mounting Facilities Parallel to the Altitude of an Isosceles Triangle: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Nonpile-Up Main Contact Arrangement: 4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Nominal Thread Size: 0.138 INCHES SINGLE MOUNTING FACILITY IN
  • Duty Type: CONTINUOUS
  • Winding Quantity: 1
  • Mounting Facility Pattern: TRIANGLE SINGLE MOUNTING FACILITY
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-539-2942, 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 Relays Inc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-539-2942
Primary Part NumberHMD5-4C425
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerRelays Inc
StatusACTIVE
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Center to Center Distance Between Mounting Facilities Parallel to the Altitude of an Isosceles Triangle1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Nonpile-Up Main Contact Arrangement4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Duty TypeCONTINUOUS
Winding Quantity1
Mounting Facility PatternTRIANGLE SINGLE MOUNTING FACILITY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Thread Class2A SINGLE MOUNTING FACILITY A
Main Contact Load Current Rating at Maximum Rated Voltage5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD
Nominal Operating Current Rating and Type60.0 MILLIAMPERES DC SINGLE WINDING
Winding DC Resistance Rating425.0 OHMS NOMINAL SINGLE WINDING
Mounting Facility Type and Quantity3 THREADED STUD(S) SINGLE MOUNTING FACILITY
Environmental ProtectionHERMETIC
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Operating Voltage Rating and Type at Specified Temp29.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Terminal Type and Quantity14 PIN ALL FUNCTIONS
Coil Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
6150-00-273-115517635 INTERCHANGEABLE
Cable Assembly,power,electrical
Volex, Inc. Dba Volex Power Cord Products Div Volex Inc.
4820-01-225-4281 INTERCHANGEABLE
Spool,cycling Vlv
4820-01-283-3892 INTERCHANGEABLE
Slide,directional Control Linear
5130-01-330-0095 INTERCHANGEABLE
Nosepiece
5325-01-341-291517635 INTERCHANGEABLE
Ring,retaining
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5365-01-395-780317635 INTERCHANGEABLE
Shim
Westerbeke Corporation
4130-01-459-917017635 INTERCHANGEABLE
Vacu-Discs
Dcm Clean Air Products, Inc.
5305-01-723-637117635 INTERCHANGEABLE
Screw,machine
Mercury Marine
Cross-Reference Index
Part NumberManufacturer
HMD5-4C425 Relays Inc (USA)
CR2791G121A4 General Electric Co Industry Control Dept of Switchgear and Control Division of Apparatus Group (USA)
CR2791G121A4 General Electric Co Semi-Conductor Products Dept Power Components Opn (USA)
17635 Cessna Aircraft Co Arc Avionics Div (USA)
CR2791G121A4 General Electric Company (USA)
Related Parts
6150-00-273-1155INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
17635
4820-01-225-4281INTERCHANGEABLE
SPOOL,CYCLING VLV
4820-01-283-3892INTERCHANGEABLE
SLIDE,DIRECTIONAL CONTROL LINEAR
5130-01-330-0095INTERCHANGEABLE
NOSEPIECE
5325-01-341-2915INTERCHANGEABLE
RING,RETAINING
17635
5365-01-395-7803INTERCHANGEABLE
SHIM
17635
4130-01-459-9170INTERCHANGEABLE
VACU-DISCS
17635
5305-01-723-6371INTERCHANGEABLE
SCREW,MACHINE
17635

Frequently Asked Questions

What is NSN 5945-00-539-2942?

NSN 5945-00-539-2942 is a Relay,electromagnetic, manufactured by Relays Inc, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-539-2942?

NSN 5945-00-539-2942 has 5 cross-referenced part numbers: HMD5-4C425 (Relays Inc), CR2791G121A4 (General Electric Co Industry Control Dept of Switchgear and Control Division of Apparatus Group), CR2791G121A4 (General Electric Co Semi-Conductor Products Dept Power Components Opn), 17635 (Cessna Aircraft Co Arc Avionics Div), CR2791G121A4 (General Electric Company).

What NSN replaces 5945-00-539-2942?

There are 8 known substitutes for 5945-00-539-2942: 6150-00-273-1155, 4820-01-225-4281, 4820-01-283-3892 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HMD5-4C425?

Key specifications for HMD5-4C425: Main Contact Maximum Voltage Rating in Volts: 115.0 AC AND 28.0 DC; Center to Center Distance Between Mounting Facilities Parallel to the Altitude of an Isosceles Triangle: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Nonpile-Up Main Contact Arrangement: 4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY; Nominal Thread Size: 0.138 INCHES SINGLE MOUNTING FACILITY 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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