PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS27401-26Relay,electromagnetic

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5945-01-099-0978 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-01-099-0978 — this item is cataloged by the U.S. Government under National Stock Number 5945-01-099-0978. Primary manufacturer part number: MS27401-26.
Features
  • Relay,electromagnetic — FSC 5945
  • Main Contact Load Current Rating at Maximum Rated Voltage: 10.0 AMPERES AC AND 10.0 AMPERES DC RESISTIVE LOAD
  • Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Duty Type: CONTINUOUS
  • Mounting Slot Width: 0.150 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Terminal Type and Quantity: 8 WIRE HOOK ALL FUNCTIONS
  • Main Contact Maximum Voltage Rating in Volts: 115.0 AC AND 28.0 DC
  • Features Provided: POLARIZED AND COIL VOLTAGE SUPPRESSION
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-01-099-0978, 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 16 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-01-099-0978
Primary Part NumberMS27401-26
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
StatusACTIVE
Main Contact Load Current Rating at Maximum Rated Voltage10.0 AMPERES AC AND 10.0 AMPERES DC RESISTIVE LOAD
Nonpile-Up Main Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Duty TypeCONTINUOUS
Mounting Slot Width0.150 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Terminal Type and Quantity8 WIRE HOOK ALL FUNCTIONS
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Features ProvidedPOLARIZED AND COIL VOLTAGE SUPPRESSION
Environmental ProtectionHERMETIC
Operating Voltage Rating and Type at Specified Temp28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Coil Quantity1
Winding Quantity1
Specification/standard Data96906-MS27401 GOVERNMENT STANDARD
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
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.).
Center to Center Distance Between Mounting Facilities Parallel to Length1.446 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
Mounting Facility Type and Quantity2 SLOTTED HOLE SINGLE MOUNTING FACILITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5945-01-275-2965 INTERCHANGEABLE
Relay,electromagnetic
Cross-Reference Index
Part NumberManufacturer
MS27401-26 Military Standards Promulgated by Military Departments 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-PRF-6106 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5945-01-275-2965INTERCHANGEABLE
RELAY,ELECTROMAGNETIC

Frequently Asked Questions

What is NSN 5945-01-099-0978?

NSN 5945-01-099-0978 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: active.

What are the part numbers for NSN 5945-01-099-0978?

NSN 5945-01-099-0978 has 3 cross-referenced part numbers: MS27401-26 (Military Standards Promulgated by Military Departments 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-PRF-6106 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5945-01-099-0978?

There is 1 known substitute for 5945-01-099-0978: 5945-01-275-2965. Verify interchangeability with system specifications before substitution.

What are the specifications of MS27401-26?

Key specifications for MS27401-26: Main Contact Load Current Rating at Maximum Rated Voltage: 10.0 AMPERES AC AND 10.0 AMPERES DC RESISTIVE LOAD; Nonpile-Up Main Contact Arrangement: 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY; Duty Type: CONTINUOUS; Overall Height: 1.320 INCHES MAXIMUM IN. 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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