PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4RJ5509Relay,electromagnetic

Sigma Instruments Inc · NSN 5945-00-602-6798 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-602-6798 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-602-6798. Primary manufacturer part number: 4RJ5509.
Features
  • Relay,electromagnetic — FSC 5945
  • Operating Voltage Rating and Type at Specified Temp: 28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
  • Environmental Protection: HERMETIC
  • Nominal Operating Current Rating and Type: 2.7 MILLIAMPERES DC SINGLE WINDING
  • Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY
  • Terminal Type and Quantity: 5 PIN ALL FUNCTIONS
  • Main Contact Load Current Rating at Maximum Rated Voltage: 2.0 AMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD
  • Mounting Facility Pattern: DIAGONAL SINGLE MOUNTING FACILITY
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-602-6798, 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 Sigma Instruments Inc. Government technical data includes 18 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-602-6798
Primary Part Number4RJ5509
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerSigma Instruments Inc
StatusACTIVE
Operating Voltage Rating and Type at Specified Temp28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Environmental ProtectionHERMETIC
Nominal Operating Current Rating and Type2.7 MILLIAMPERES DC SINGLE WINDING
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Terminal Type and Quantity5 PIN ALL FUNCTIONS
Main Contact Load Current Rating at Maximum Rated Voltage2.0 AMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD
Mounting Facility PatternDIAGONAL SINGLE MOUNTING FACILITY
Thread Class2A SINGLE MOUNTING FACILITY A
Winding DC Resistance Rating10.0 OHMS NOMINAL SINGLE WINDING
Main Contact Maximum Voltage Rating in Volts120.0 AC AND 28.0 DC
Mounting Facility Type and Quantity2 THREADED STUD(S) SINGLE MOUNTING FACILITY
Duty TypeCONTINUOUS
Nonpile-Up Main Contact Arrangement1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Coil Quantity1
Winding Quantity1
Center to Center Distance Between Mounting Facilities Parallel to Length1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-681-26201668470 INTERCHANGEABLE
Coil,radio Frequency
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Cross-Reference Index
Part NumberManufacturer
4RJ5509 Sigma Instruments Inc (USA)
RL1012 Bae Systems Information and Electronic Systems Integration Inc. (USA)
Related Parts
5950-00-681-2620INTERCHANGEABLE
COIL,RADIO FREQUENCY
1668470

Frequently Asked Questions

What is NSN 5945-00-602-6798?

NSN 5945-00-602-6798 is a Relay,electromagnetic, manufactured by Sigma Instruments Inc, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-602-6798?

NSN 5945-00-602-6798 has 2 cross-referenced part numbers: 4RJ5509 (Sigma Instruments Inc), RL1012 (Bae Systems Information and Electronic Systems Integration Inc.).

What NSN replaces 5945-00-602-6798?

There is 1 known substitute for 5945-00-602-6798: 5950-00-681-2620. Verify interchangeability with system specifications before substitution.

What are the specifications of 4RJ5509?

Key specifications for 4RJ5509: Operating Voltage Rating and Type at Specified Temp: 28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING; Environmental Protection: HERMETIC; Nominal Operating Current Rating and Type: 2.7 MILLIAMPERES DC SINGLE WINDING; Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY. 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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