PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M5757/1-003Relay,electromagnetic

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5945-00-558-9155 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-558-9155 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-558-9155. Primary manufacturer part number: M5757/1-003.
Features
  • Relay,electromagnetic — FSC 5945
  • Winding DC Resistance Rating: 190.0 OHMS MINIMUM AND 300.0 OHMS MAXIMUM SINGLE WINDING
  • Time Delay: 0.0150 SECONDS MAXIMUM FIXED RELEASE TIME
  • Main Contact Load Current Rating at Maximum Rated Voltage: 300.0 MILLIAMPERES AC AND 300.0 MILLIAMPERES DC RESISTIVE LOAD
  • Duty Type: CONTINUOUS
  • Unthreaded Mounting Hole Diameter: 0.152 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Main Contact Maximum Voltage Rating in Volts: 115.0 AC AND 28.0 DC
  • Environmental Protection: HERMETIC
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-558-9155, 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 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-558-9155
Primary Part NumberM5757/1-003
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
Winding DC Resistance Rating190.0 OHMS MINIMUM AND 300.0 OHMS MAXIMUM SINGLE WINDING
Time Delay0.0150 SECONDS MAXIMUM FIXED RELEASE TIME
Main Contact Load Current Rating at Maximum Rated Voltage300.0 MILLIAMPERES AC AND 300.0 MILLIAMPERES DC RESISTIVE LOAD
Duty TypeCONTINUOUS
Unthreaded Mounting Hole Diameter0.152 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Environmental ProtectionHERMETIC
Center to Center Distance Between Mounting Facilities Parallel to Width1.562 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Operating Voltage Rating and Type at Specified Temp26.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Coil Quantity1
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Winding Quantity1
Time Delay0.0150 SECONDS MAXIMUM FIXED OPERATE TIME
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5945-00-458-7204 INTERCHANGEABLE
Relay,electromagnetic
5945-00-494-8964 INTERCHANGEABLE
Relay,electromagnetic
5945-00-823-2611 INTERCHANGEABLE
Relay,electromagnetic
5945-00-874-0602 INTERCHANGEABLE
Relay,electromagnetic
5945-00-905-7719 INTERCHANGEABLE
Relay,electromagnetic
5945-01-018-1935A13-4155 INTERCHANGEABLE
Relay,electromagnetic
Dri Relays Inc. Dba Dri Relays Inc
5945-01-062-5154 INTERCHANGEABLE
Relay,electromagnetic
5945-01-159-4902 INTERCHANGEABLE
Relay,electromagnetic
5945-01-178-6832 INTERCHANGEABLE
Relay,electromagnetic
Cross-Reference Index
Part NumberManufacturer
M5757/1-003 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILR5757-1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
352250014695 Thales Nederland (NLD)
Related Parts
5945-00-458-7204INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-00-494-8964INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-00-823-2611INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-00-874-0602INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-00-905-7719INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-018-1935INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
A13-4155
5945-01-062-5154INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-159-4902INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-178-6832INTERCHANGEABLE
RELAY,ELECTROMAGNETIC

Frequently Asked Questions

What is NSN 5945-00-558-9155?

NSN 5945-00-558-9155 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 5945-00-558-9155?

NSN 5945-00-558-9155 has 3 cross-referenced part numbers: M5757/1-003 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILR5757-1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 352250014695 (Thales Nederland).

What NSN replaces 5945-00-558-9155?

There are 9 known substitutes for 5945-00-558-9155: 5945-00-458-7204, 5945-00-494-8964, 5945-00-823-2611 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M5757/1-003?

Key specifications for M5757/1-003: Winding DC Resistance Rating: 190.0 OHMS MINIMUM AND 300.0 OHMS MAXIMUM SINGLE WINDING; Time Delay: 0.0150 SECONDS MAXIMUM FIXED RELEASE TIME; Main Contact Load Current Rating at Maximum Rated Voltage: 300.0 MILLIAMPERES AC AND 300.0 MILLIAMPERES DC RESISTIVE LOAD; Duty Type: CONTINUOUS. 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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