PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILR5757Relay,electromagnetic

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5945-00-942-4427 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-942-4427 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-942-4427. Primary manufacturer part number: MILR5757.
Features
  • Relay,electromagnetic — FSC 5945
  • Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY
  • Main Contact Maximum Voltage Rating in Volts: 26.5 DC
  • Winding DC Resistance Rating: 240.0 OHMS NOMINAL SINGLE WINDING
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.875 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Time Delay: 0.0100 SECONDS NOMINAL FIXED OPERATE TIME
  • Unthreaded Mounting Hole Diameter: 0.152 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Duty Type: CONTINUOUS
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-942-4427, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-942-4427
Primary Part NumberMILR5757
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Main Contact Maximum Voltage Rating in Volts26.5 DC
Winding DC Resistance Rating240.0 OHMS NOMINAL SINGLE WINDING
Center to Center Distance Between Mounting Facilities Parallel to Length0.875 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Time Delay0.0100 SECONDS NOMINAL FIXED OPERATE TIME
Unthreaded Mounting Hole Diameter0.152 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Duty TypeCONTINUOUS
Main Contact Load Current Rating at Maximum Rated Voltage2.0 AMPERES DC RESISTIVE LOAD
Environmental ProtectionHERMETIC
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Winding Quantity1
Operating Voltage Rating and Type at Specified Temp26.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Time Delay0.0100 SECONDS NOMINAL FIXED RELEASE TIME
Coil Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5945-00-051-7270 INTERCHANGEABLE
Relay,electromagnetic
5945-00-088-5425 INTERCHANGEABLE
Relay,reed
5945-00-089-2732 INTERCHANGEABLE
Relay,electromagnetic
5945-00-665-9453SKHX657 INTERCHANGEABLE
Relay,electromagnetic
Allied Controls, Inc.
5945-00-829-0004 INTERCHANGEABLE
Relay,electromagnetic
Cross-Reference Index
Part NumberManufacturer
MILR5757 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
RY4LA2B3L01 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5945-00-051-7270INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-00-088-5425INTERCHANGEABLE
RELAY,REED
5945-00-089-2732INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-00-665-9453INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
SKHX657
5945-00-829-0004INTERCHANGEABLE
RELAY,ELECTROMAGNETIC

Frequently Asked Questions

What is NSN 5945-00-942-4427?

NSN 5945-00-942-4427 is a Relay,electromagnetic, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-942-4427?

NSN 5945-00-942-4427 has 2 cross-referenced part numbers: MILR5757 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), RY4LA2B3L01 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5945-00-942-4427?

There are 5 known substitutes for 5945-00-942-4427: 5945-00-051-7270, 5945-00-088-5425, 5945-00-089-2732 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILR5757?

Key specifications for MILR5757: Overall Height: 0.750 INCHES NOMINAL IN; Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY; Main Contact Maximum Voltage Rating in Volts: 26.5 DC; Winding DC Resistance Rating: 240.0 OHMS NOMINAL SINGLE WINDING. 17 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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