PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

27551Relay,electromagnetic

Hamilton Sundstrand Corporation · NSN 5945-00-778-2510 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-778-2510 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-778-2510. Primary manufacturer part number: 27551.
Features
  • Relay,electromagnetic — FSC 5945
  • Operating Voltage Rating and Type at Specified Temp: 28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
  • Unthreaded Mounting Hole Diameter: 0.141 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 1.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Main Contact Load Current Rating at Maximum Rated Voltage: 2.0 AMPERES DC RESISTIVE LOAD
  • Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY
  • Duty Type: CONTINUOUS
  • Main Contact Maximum Voltage Rating in Volts: 28.0 DC
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-778-2510, 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 Hamilton Sundstrand Corporation. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-778-2510
Primary Part Number27551
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerHamilton Sundstrand Corporation
StatusCANCELLED
Operating Voltage Rating and Type at Specified Temp28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Unthreaded Mounting Hole Diameter0.141 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Center to Center Distance Between Mounting Facilities Parallel to Length1.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Main Contact Load Current Rating at Maximum Rated Voltage2.0 AMPERES DC RESISTIVE LOAD
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Duty TypeCONTINUOUS
Main Contact Maximum Voltage Rating in Volts28.0 DC
Coil Quantity1
Environmental ProtectionHERMETIC
Pile-Up Main Contact Form Arrangement2C
Winding Quantity1
Nominal Operating Current Rating and Type60.0 MILLIAMPERES DC SINGLE WINDING
Winding DC Resistance Rating431.0 OHMS NOMINAL SINGLE WINDING
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Terminal Type and Quantity8 PIN ALL FUNCTIONS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5330-01-332-4306 INTERCHANGEABLE
Parts Kit,seal Replacement,mecha
5305-01-548-473229933 INTERCHANGEABLE
Screw,cap,hexagon Head
Eagle Components, Inc
6505-01-562-815327551 INTERCHANGEABLE
Zincs,jet
Willard Marine, Inc.
5305-01-580-7485 INTERCHANGEABLE
Screw,cap,hexagon Head
Cross-Reference Index
Part NumberManufacturer
2B1403 Hi-G Co Inc Sub of Nytronics Inc (USA)
27551 PRIMARY Hamilton Sundstrand Corporation (USA)
Related Parts
5330-01-332-4306INTERCHANGEABLE
PARTS KIT,SEAL REPLACEMENT,MECHA
5305-01-548-4732INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
29933
6505-01-562-8153INTERCHANGEABLE
ZINCS,JET
27551
5305-01-580-7485INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5945-00-778-2510?

NSN 5945-00-778-2510 is a Relay,electromagnetic, manufactured by Hamilton Sundstrand Corporation, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-778-2510?

NSN 5945-00-778-2510 has 2 cross-referenced part numbers: 2B1403 (Hi-G Co Inc Sub of Nytronics Inc), 27551 (Hamilton Sundstrand Corporation).

What NSN replaces 5945-00-778-2510?

There are 4 known substitutes for 5945-00-778-2510: 5330-01-332-4306, 5305-01-548-4732, 6505-01-562-8153 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 27551?

Key specifications for 27551: Operating Voltage Rating and Type at Specified Temp: 28.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING; Unthreaded Mounting Hole Diameter: 0.141 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Center to Center Distance Between Mounting Facilities Parallel to Length: 1.062 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Main Contact Load Current Rating at Maximum Rated Voltage: 2.0 AMPERES DC RESISTIVE LOAD. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-778-2510 still in active supply?

NSN 5945-00-778-2510 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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