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 5945-00-051-7270 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-051-7270 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-051-7270. Primary manufacturer part number: MILR5757.
Features
  • Relay,electromagnetic — FSC 5945
  • Main Contact Maximum Voltage Rating in Volts: 26.5 DC
  • Duty Type: CONTINUOUS
  • Pile-Up Main Contact Form Arrangement: 2C AND 2C
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 1.406 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Winding DC Resistance Rating: 240.0 OHMS NOMINAL SINGLE WINDING
  • Operating Voltage Rating and Type at Specified Temp: 26.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-051-7270, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, 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
NSN5945-00-051-7270
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
Main Contact Maximum Voltage Rating in Volts26.5 DC
Duty TypeCONTINUOUS
Pile-Up Main Contact Form Arrangement2C AND 2C
Center to Center Distance Between Mounting Facilities Parallel to Length1.406 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Winding DC Resistance Rating240.0 OHMS NOMINAL SINGLE WINDING
Operating Voltage Rating and Type at Specified Temp26.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Main Contact Load Current Rating at Maximum Rated Voltage2.0 AMPERES DC INDUCTIVE LOAD
Time Delay0.01 SECONDS NOMINAL FIXED OPERATE TIME
Unthreaded Mounting Hole Diameter0.152 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Coil Quantity1
Environmental ProtectionHERMETIC
Time Delay0.01 SECONDS NOMINAL FIXED RELEASE TIME
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Winding Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
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
5945-00-942-4427 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
MHJZ12D26-5 Allied Controls, Inc. (USA)
RY4LB1A3L01 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
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
5945-00-942-4427INTERCHANGEABLE
RELAY,ELECTROMAGNETIC

Frequently Asked Questions

What is NSN 5945-00-051-7270?

NSN 5945-00-051-7270 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 5945-00-051-7270?

NSN 5945-00-051-7270 has 3 cross-referenced part numbers: MILR5757 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MHJZ12D26-5 (Allied Controls, Inc.), RY4LB1A3L01 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5945-00-051-7270?

There are 5 known substitutes for 5945-00-051-7270: 5945-00-088-5425, 5945-00-089-2732, 5945-00-665-9453 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILR5757?

Key specifications for MILR5757: Main Contact Maximum Voltage Rating in Volts: 26.5 DC; Overall Width: 1.660 INCHES MAXIMUM IN; Overall Length: 1.840 INCHES MAXIMUM IN; Duty Type: CONTINUOUS. 19 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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