PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1977Relay,electromagnetic

Bunn-O-Matic Corporation Div Government Sales · NSN 5945-01-245-1970 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-01-245-1970 — this item is cataloged by the U.S. Government under National Stock Number 5945-01-245-1970. Primary manufacturer part number: 1977.
Features
  • Relay,electromagnetic — FSC 5945
  • Fragility Factor: MODERATELY RUGGED
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
  • Thread Direction: RIGHT-HAND SINGLE MOUNTING FACILITY
  • Frequency in Hertz: 50.0 MINIMUM AND 60.0 MAXIMUM
  • Thread Quantity Per Inch: 32 SINGLE MOUNTING FACILITY
  • Arc Quenching Method: AIR
  • Winding Quantity: 1
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
  • Applications requiring Plastic Case construction
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-01-245-1970, 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 Bunn-O-Matic Corporation Div Government Sales. Government technical data includes 24 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-01-245-1970
Primary Part Number1977
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerBunn-O-Matic Corporation Div Government Sales
StatusACTIVE
Fragility FactorMODERATELY RUGGED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Thread DirectionRIGHT-HAND SINGLE MOUNTING FACILITY
Frequency in Hertz50.0 MINIMUM AND 60.0 MAXIMUM
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Arc Quenching MethodAIR
Winding Quantity1
Terminal Type and Quantity8 TAB, SOLDER LUG ALL FUNCTIONS
Time Delay0.01 SECONDS MAXIMUM FIXED RELEASE TIME
Time Delay0.015 SECONDS MAXIMUM FIXED OPERATE TIME
Winding DC Resistance Rating9.11 KILOHMS NOMINAL SINGLE WINDING
Nonpile-Up Main Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Operating Voltage Rating and Type at Specified Temp240.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Purpose for Which DesignedGENERAL
Mounting Facility Type and Quantity1 THREADED STUD(S) SINGLE MOUNTING FACILITY
Main Contact Load Current Rating at Maximum Rated Voltage5.0 AMPERES AC RESISTIVE LOAD
Thread Class2A SINGLE MOUNTING FACILITY A
MaterialPLASTIC CASE
Coil Quantity1
Duty TypeCONTINUOUS
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Storage TypeGENERAL PURPOSE WAREHOUSE
Cubic Measure4.564 CUBIC INCHES
Main Contact Maximum Voltage Rating in Volts120.0 AC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-005-0464 INTERCHANGEABLE
Bushing,sleeve
4310-00-174-02901977 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
4730-00-279-0364 INTERCHANGEABLE
Fitting,lubrication
3120-00-353-05901977 INTERCHANGEABLE
Bushing,sleeve
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
6240-00-433-27071977 INTERCHANGEABLE
Lamp,incandescent
Micro Lamps Inc.
5360-00-664-3628 INTERCHANGEABLE
Spring,helical,compression
6680-00-798-29301977-4 INTERCHANGEABLE
Diaphragm Assembly,top
Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
5330-01-010-9695197-7 INTERCHANGEABLE
Seal
The Specialty Mfg. Co Dba Specialty Mfg. Co
7450-01-051-5998 INTERCHANGEABLE
Reproducer,sound
5330-01-102-4681132-0369 INTERCHANGEABLE
Seal,plain
Caterpillar Inc Div Caterpillar Defense
Cross-Reference Index
Part NumberManufacturer
1977 PRIMARY Bunn-O-Matic Corporation Div Government Sales (USA)
KA11AY-240 Te Connectivity Corporation (USA)
Related Parts
3120-00-005-0464INTERCHANGEABLE
BUSHING,SLEEVE
4310-00-174-0290INTERCHANGEABLE
RING,PISTON
1977
4730-00-279-0364INTERCHANGEABLE
FITTING,LUBRICATION
3120-00-353-0590INTERCHANGEABLE
BUSHING,SLEEVE
1977
6240-00-433-2707INTERCHANGEABLE
LAMP,INCANDESCENT
1977
5360-00-664-3628INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
6680-00-798-2930INTERCHANGEABLE
DIAPHRAGM ASSEMBLY,TOP
1977-4
5330-01-010-9695INTERCHANGEABLE
SEAL
197-7
7450-01-051-5998INTERCHANGEABLE
REPRODUCER,SOUND
5330-01-102-4681INTERCHANGEABLE
SEAL,PLAIN
132-0369
6625-01-164-8371INTERCHANGEABLE
AMMETER
5950-01-319-9119INTERCHANGEABLE
TRANSFORMER,CURRENT
1977

Frequently Asked Questions

What is NSN 5945-01-245-1970?

NSN 5945-01-245-1970 is a Relay,electromagnetic, manufactured by Bunn-O-Matic Corporation Div Government Sales, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-01-245-1970?

NSN 5945-01-245-1970 has 2 cross-referenced part numbers: 1977 (Bunn-O-Matic Corporation Div Government Sales), KA11AY-240 (Te Connectivity Corporation).

What NSN replaces 5945-01-245-1970?

There are 12 known substitutes for 5945-01-245-1970: 3120-00-005-0464, 4310-00-174-0290, 4730-00-279-0364 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1977?

Key specifications for 1977: Overall Width: 1.468 INCHES MAXIMUM IN; Fragility Factor: MODERATELY RUGGED; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY; Thread Direction: RIGHT-HAND SINGLE MOUNTING FACILITY. 27 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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