PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS27401-51XRelay,electromagnetic

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5945-01-407-1581 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-01-407-1581 — this item is cataloged by the U.S. Government under National Stock Number 5945-01-407-1581. Primary manufacturer part number: MS27401-51X.
Features
  • Relay,electromagnetic — FSC 5945
  • Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Specification/standard Data: 96906-MS27401 GOVERNMENT STANDARD
  • Winding Quantity: 1
  • Purpose for Which Designed: GENERAL
  • Fragility Factor: MODERATELY RUGGED
  • Environmental Protection: HERMETIC
  • Test Data Document: 81349-MIL-R-6106 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-01-407-1581, 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 Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-01-407-1581
Primary Part NumberMS27401-51X
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Nonpile-Up Main Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Specification/standard Data96906-MS27401 GOVERNMENT STANDARD
Winding Quantity1
Purpose for Which DesignedGENERAL
Fragility FactorMODERATELY RUGGED
Environmental ProtectionHERMETIC
Test Data Document81349-MIL-R-6106 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Operating Voltage Rating and Type at Specified Temp28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Mounting Facility Type and Quantity8 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY
Main Contact Load Current Rating at Maximum Rated Voltage4.0 AMPERES AC AND 4.0 AMPERES DC MOTOR LOAD
Main Contact Load Current Rating at Maximum Rated Voltage2.0 AMPERES AC AND 2.0 AMPERES DC LAMP LOAD
Criticality Code JustificationFEAT
Time Delay0.01 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME
Terminal Type and Quantity8 PIN ALL FUNCTIONS
Duty TypeCONTINUOUS
Coil Quantity1
Main Contact Load Current Rating at Maximum Rated Voltage10.0 AMPERES AC AND 10.0 AMPERES DC RESISTIVE LOAD
Arc Quenching MethodAIR
Winding DC Resistance Rating320.0 OHMS NOMINAL SINGLE WINDING
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Cubic Measure1.181 CUBIC INCHES
Storage TypeGENERAL PURPOSE WAREHOUSE
Main Contact Load Current Rating at Maximum Rated Voltage8.0 AMPERES AC AND 8.0 AMPERES DC INDUCTIVE LOAD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5945-01-096-3098 INTERCHANGEABLE
Relay,electromagnetic
5945-01-178-4234 INTERCHANGEABLE
Relay,electromagnetic
5945-01-183-6703 INTERCHANGEABLE
Relay,electromagnetic
5945-01-229-9315 INTERCHANGEABLE
Relay,electromagnetic
5945-01-285-9883 INTERCHANGEABLE
Relay,electromagnetic
5945-01-414-7681 INTERCHANGEABLE
Relay,electromagnetic
5945-01-435-2667 INTERCHANGEABLE
Relay,electromagnetic
5945-01-458-8867 INTERCHANGEABLE
Relay,electromagnetic
5945-01-512-0813 INTERCHANGEABLE
Relay,electromagnetic
5945-01-605-7337 INTERCHANGEABLE
Relay,electromagnetic
Cross-Reference Index
Part NumberManufacturer
MS27401-51X Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
M83536/9-019M Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-6106 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-R-6106 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-R-83536/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-83536/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5945-01-096-3098INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-178-4234INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-183-6703INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-229-9315INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-285-9883INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-414-7681INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-435-2667INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-458-8867INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-512-0813INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5945-01-605-7337INTERCHANGEABLE
RELAY,ELECTROMAGNETIC

Frequently Asked Questions

What is NSN 5945-01-407-1581?

NSN 5945-01-407-1581 is a Relay,electromagnetic, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-01-407-1581?

NSN 5945-01-407-1581 has 6 cross-referenced part numbers: MS27401-51X (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), M83536/9-019M (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-6106 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-R-6106 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-R-83536/9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 5945-01-407-1581?

There are 10 known substitutes for 5945-01-407-1581: 5945-01-096-3098, 5945-01-178-4234, 5945-01-183-6703 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS27401-51X?

Key specifications for MS27401-51X: Overall Width: 0.525 INCHES MAXIMUM IN; Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY; Overall Length: 1.718 INCHES MAXIMUM IN; Specification/standard Data: 96906-MS27401 GOVERNMENT STANDARD. 27 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-01-407-1581 still in active supply?

NSN 5945-01-407-1581 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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