PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12C3Relay,thermal

Amperite Co Inc · NSN 5945-00-578-0446 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-578-0446 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-578-0446. Primary manufacturer part number: 12C3.
Features
  • Relay,thermal — FSC 5945
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
  • Terminal Type and Quantity: 8 PIN
  • Specification/standard Data: 10001-59A10C289 MANUFACTURERS SPECIFICATION CONTROL
  • Heater Voltage Rating in Volts: 6.3
  • Heater Power Rating in Watts: 4.5
  • Mounting Facility Type and Quantity: 1 OCTAL BASE PLUG-IN
  • Contact Maximum Current Rating in Amps: 0.5 DC
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-578-0446, 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 Amperite Co Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 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
NSN5945-00-578-0446
Primary Part Number12C3
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerAmperite Co Inc
StatusCANCELLED
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Terminal Type and Quantity8 PIN
Specification/standard Data10001-59A10C289 MANUFACTURERS SPECIFICATION CONTROL
Heater Voltage Rating in Volts6.3
Heater Power Rating in Watts4.5
Mounting Facility Type and Quantity1 OCTAL BASE PLUG-IN
Contact Maximum Current Rating in Amps0.5 DC
Overall Diameter1.280 INCHES NOMINAL IN
Contact Maximum Voltage Rating in Volts30.0 DC
Delay Time in Seconds3.5 FIXED OPERATE NOMINAL AND 5.0 FIXED RELEASE NOMINAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5340-00-152-0457157E11-2296 INTERCHANGEABLE
Clamp,loop
Kurz & Root Generator Company, Llc
5930-00-254-7502401290-2 INTERCHANGEABLE
Switch,code Indicating Wheel
Aimtron Systems, Llc
2940-00-529-273715 INTERCHANGEABLE
Filter Element,fluid
Naval Construction Battalion Center Civil Engineer Support Office Dba Exwc Ex24 Div Ex24 Tools
3010-00-848-7301620359 INTERCHANGEABLE
Insert,flexible Coupling
Rexnord Industries, Llc Div Couplings Division
3110-00-908-6507 INTERCHANGEABLE
Bearing,main
3020-01-007-0686G29-32 INTERCHANGEABLE
Gear,spur
Roller Bearing Co of America, Inc Div Pic Design
3040-01-031-3788 INTERCHANGEABLE
Parts Kit,linear Actuating Cylin
5360-01-055-439820359 INTERCHANGEABLE
Spring,helical,compression
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5935-01-137-401920359 INTERCHANGEABLE
Cover,electrical Connector
L3 Technologies, Inc. Div Communication Systems-West
5360-01-197-3191 INTERCHANGEABLE
Spring,helical,compression
Cross-Reference Index
Part NumberManufacturer
A261F Cooper Industries Inc Champion Aviation Products (USA)
59A10C289 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
X35 Cooper Industries Inc Champion Aviation Products (USA)
20359 Raytheon Company Dba Raytheon (USA)
452-1363 Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions (USA)
1566070 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
12C3 PRIMARY Amperite Co Inc (USA)
B-2532 Jettron Products Inc (USA)
Related Parts
5340-00-152-0457INTERCHANGEABLE
CLAMP,LOOP
157E11-2296
5930-00-254-7502INTERCHANGEABLE
SWITCH,CODE INDICATING WHEEL
401290-2
2940-00-529-2737INTERCHANGEABLE
FILTER ELEMENT,FLUID
15
3010-00-848-7301INTERCHANGEABLE
INSERT,FLEXIBLE COUPLING
620359
3110-00-908-6507INTERCHANGEABLE
BEARING,MAIN
3020-01-007-0686INTERCHANGEABLE
GEAR,SPUR
G29-32
3040-01-031-3788INTERCHANGEABLE
PARTS KIT,LINEAR ACTUATING CYLIN
5360-01-055-4398INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
20359
5935-01-137-4019INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
20359
5360-01-197-3191INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5962-01-232-5937INTERCHANGEABLE
MICROCIRCUIT,DIGITAL-LINEAR
4720-01-487-4325INTERCHANGEABLE
HOSE,NONMETALLIC
12C3

Frequently Asked Questions

What is NSN 5945-00-578-0446?

NSN 5945-00-578-0446 is a Relay,thermal, manufactured by Amperite Co Inc, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-578-0446?

NSN 5945-00-578-0446 has 8 cross-referenced part numbers: A261F (Cooper Industries Inc Champion Aviation Products), 59A10C289 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), X35 (Cooper Industries Inc Champion Aviation Products), 20359 (Raytheon Company Dba Raytheon), 452-1363 (Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions) and 3 more.

What NSN replaces 5945-00-578-0446?

There are 12 known substitutes for 5945-00-578-0446: 5340-00-152-0457, 5930-00-254-7502, 2940-00-529-2737 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12C3?

Key specifications for 12C3: Overall Length: 2.750 INCHES NOMINAL IN; Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN; Terminal Type and Quantity: 8 PIN; Specification/standard Data: 10001-59A10C289 MANUFACTURERS SPECIFICATION CONTROL. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-578-0446 still in active supply?

NSN 5945-00-578-0446 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.
PartsTable Design LLC · partstable.com