PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6550-BRelay,electromagnetic

Hoyt Corporation · NSN 5945-01-111-0420 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-01-111-0420 — this item is cataloged by the U.S. Government under National Stock Number 5945-01-111-0420. Primary manufacturer part number: 6550-B.
Features
  • Relay,electromagnetic — FSC 5945
  • Main Contact Maximum Voltage Rating in Volts: 600.0 AC
  • Main Contact Load Current Rating at Maximum Rated Voltage: 20.0 AMPERES AC RESISTIVE LOAD
  • Winding Quantity: 2
  • Mounting Facility Type and Quantity: 2 SLOTTED HOLE SINGLE MOUNTING FACILITY
  • Terminal Type and Quantity: 12 TAB, SOLDER LUG CONTACTS
  • Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY
  • Operating Voltage Rating and Type at Specified Temp: 240.0 VOLTS AC 25 DEG CELSIUS ALL WINDINGS
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-01-111-0420, 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 Hoyt Corporation. Government technical data includes 12 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-01-111-0420
Primary Part Number6550-B
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerHoyt Corporation
StatusCANCELLED
Main Contact Maximum Voltage Rating in Volts600.0 AC
Main Contact Load Current Rating at Maximum Rated Voltage20.0 AMPERES AC RESISTIVE LOAD
Winding Quantity2
Mounting Facility Type and Quantity2 SLOTTED HOLE SINGLE MOUNTING FACILITY
Terminal Type and Quantity12 TAB, SOLDER LUG CONTACTS
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Operating Voltage Rating and Type at Specified Temp240.0 VOLTS AC 25 DEG CELSIUS ALL WINDINGS
Terminal Type and Quantity6 SCREW ENERGIZING ELEMENT
Duty TypeCONTINUOUS
Mounting Slot Width0.188 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Center to Center Distance Between Mounting Facilities Parallel to Length5.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Coil Quantity2
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-025-7739 INTERCHANGEABLE
Washer,flat
5315-00-145-5119 INTERCHANGEABLE
Pin,king
4820-00-375-75261H4820-375-7526 INTERCHANGEABLE
Disk,valve
Naval Inventory Control Point Mechanicsburg
6675-00-556-0202165 INTERCHANGEABLE
Table,tracing,drafting
Hamilton Mfg Co
2920-00-593-52356561 INTERCHANGEABLE
Cover,terminal Shie
Champion Aerospace Llc
5940-00-926-819212751A INTERCHANGEABLE
Terminal,feedthru
Staffall, Inc. Dba Staffall Inc
4720-01-083-2451AE145-1 INTERCHANGEABLE
Tubing,nonmetallic
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
5962-01-119-4707 INTERCHANGEABLE
Microcircuit,memory
2940-01-274-191646561 INTERCHANGEABLE
Filter Element,intake Air Cleane
Wix Corp
4810-01-424-47216561-G501 INTERCHANGEABLE
Valve,solenoid
Howell Laboratories Inc Dba Howell Laboratories Inc
Cross-Reference Index
Part NumberManufacturer
6550-B PRIMARY Hoyt Corporation (USA)
6561 Hoyt Corporation (USA)
30R-00-300 Honeywell International Inc. Dba Honeywell Div Sensing and Control (USA)
Related Parts
5310-00-025-7739INTERCHANGEABLE
WASHER,FLAT
5315-00-145-5119INTERCHANGEABLE
PIN,KING
4820-00-375-7526INTERCHANGEABLE
DISK,VALVE
1H4820-375-7526
6675-00-556-0202INTERCHANGEABLE
TABLE,TRACING,DRAFTING
165
2920-00-593-5235INTERCHANGEABLE
COVER,TERMINAL SHIE
6561
5940-00-926-8192INTERCHANGEABLE
TERMINAL,FEEDTHRU
12751A
4720-01-083-2451INTERCHANGEABLE
TUBING,NONMETALLIC
AE145-1
5962-01-119-4707INTERCHANGEABLE
MICROCIRCUIT,MEMORY
2940-01-274-1916INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
46561
4810-01-424-4721INTERCHANGEABLE
VALVE,SOLENOID
6561-G501
4810-01-424-4986INTERCHANGEABLE
PARTS KIT,SOLENOID VALVE
6561-02
3110-01-563-6799INTERCHANGEABLE
BEARING,BALL,ANNULAR
135556

Frequently Asked Questions

What is NSN 5945-01-111-0420?

NSN 5945-01-111-0420 is a Relay,electromagnetic, manufactured by Hoyt Corporation, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-01-111-0420?

NSN 5945-01-111-0420 has 3 cross-referenced part numbers: 6550-B (Hoyt Corporation), 6561 (Hoyt Corporation), 30R-00-300 (Honeywell International Inc. Dba Honeywell Div Sensing and Control).

What NSN replaces 5945-01-111-0420?

There are 12 known substitutes for 5945-01-111-0420: 5310-00-025-7739, 5315-00-145-5119, 4820-00-375-7526 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6550-B?

Key specifications for 6550-B: Overall Length: 5.875 INCHES NOMINAL IN; Main Contact Maximum Voltage Rating in Volts: 600.0 AC; Overall Width: 3.312 INCHES NOMINAL IN; Special Features: MOTOR REVERSING CONTACTOR. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-01-111-0420 still in active supply?

NSN 5945-01-111-0420 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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