PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-R-5757/29Relay,reed

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5945-00-133-0499 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-133-0499 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-133-0499. Primary manufacturer part number: MIL-R-5757/29.
Features
  • Relay,reed — FSC 5945
  • Nonpile-Up Main Contact Arrangement: 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Specification/standard Data: 81349-MIL-R-5757/29 GOVERNMENT SPECIFICATION
  • Winding DC Resistance Rating: 1.45 KILOHMS NOMINAL SINGLE WINDING
  • Terminal Type and Quantity: 5 PIN ENERGIZING ELEMENT AND CONTACTS
  • Cubic Measure: 0.442 CUBIC INCHES
  • Main Contact Maximum Voltage Rating in Volts: 28.0 DC
  • Fragility Factor: MODERATELY RUGGED
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,reed, cataloged under National Stock Number 5945-00-133-0499, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-133-0499
Primary Part NumberMIL-R-5757/29
Item NameRelay,reed
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Nonpile-Up Main Contact Arrangement1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Specification/standard Data81349-MIL-R-5757/29 GOVERNMENT SPECIFICATION
Winding DC Resistance Rating1.45 KILOHMS NOMINAL SINGLE WINDING
Terminal Type and Quantity5 PIN ENERGIZING ELEMENT AND CONTACTS
Cubic Measure0.442 CUBIC INCHES
Main Contact Maximum Voltage Rating in Volts28.0 DC
Fragility FactorMODERATELY RUGGED
Storage TypeGENERAL PURPOSE WAREHOUSE
Coil Quantity1
Mounting Facility Type and Quantity1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY
Main Contact Load Current Rating at Maximum Rated Voltage500.0 MILLIAMPERES DC RESISTIVE LOAD
Purpose for Which DesignedGENERAL
Winding Quantity1
Terminal Type and Quantity1 PIN GROUND
Environmental ProtectionDUSTPROOF
Duty TypeCONTINUOUS
Test Data Document81349-MIL-R-5757 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 Temp26.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5945-00-025-7232 INTERCHANGEABLE
Relay,reed
5945-00-088-5425 INTERCHANGEABLE
Relay,reed
5945-00-088-5426 INTERCHANGEABLE
Relay,reed
5945-00-189-2925 INTERCHANGEABLE
Relay,reed
5945-00-414-3283 INTERCHANGEABLE
Relay,reed
5945-00-483-0181 INTERCHANGEABLE
Relay,reed
5945-00-490-3696 INTERCHANGEABLE
Relay,reed
5945-01-013-5213 INTERCHANGEABLE
Relay,reed
5945-01-013-5214 INTERCHANGEABLE
Relay,reed
5945-01-014-6741 INTERCHANGEABLE
Relay,reed
Cross-Reference Index
Part NumberManufacturer
MIL-R-5757/29 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M5757/29-002 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
339295-002 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
MIL-DTL-5757/29 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5945-00-025-7232INTERCHANGEABLE
RELAY,REED
5945-00-088-5425INTERCHANGEABLE
RELAY,REED
5945-00-088-5426INTERCHANGEABLE
RELAY,REED
5945-00-189-2925INTERCHANGEABLE
RELAY,REED
5945-00-414-3283INTERCHANGEABLE
RELAY,REED
5945-00-483-0181INTERCHANGEABLE
RELAY,REED
5945-00-490-3696INTERCHANGEABLE
RELAY,REED
5945-01-013-5213INTERCHANGEABLE
RELAY,REED
5945-01-013-5214INTERCHANGEABLE
RELAY,REED
5945-01-014-6741INTERCHANGEABLE
RELAY,REED
5945-01-037-7721INTERCHANGEABLE
RELAY,REED
5945-01-110-1928INTERCHANGEABLE
RELAY,REED

Frequently Asked Questions

What is NSN 5945-00-133-0499?

NSN 5945-00-133-0499 is a Relay,reed, 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 5945-00-133-0499?

NSN 5945-00-133-0499 has 4 cross-referenced part numbers: MIL-R-5757/29 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M5757/29-002 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 339295-002 (Lockheed Martin Corporation Div Rms - Mitchel Field), MIL-DTL-5757/29 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5945-00-133-0499?

There are 12 known substitutes for 5945-00-133-0499: 5945-00-025-7232, 5945-00-088-5425, 5945-00-088-5426 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-R-5757/29?

Key specifications for MIL-R-5757/29: Nonpile-Up Main Contact Arrangement: 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY; Specification/standard Data: 81349-MIL-R-5757/29 GOVERNMENT SPECIFICATION; Overall Height: 0.685 INCHES NOMINAL IN; Overall Length: 1.290 INCHES NOMINAL IN. 21 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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