PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121163-1Relay,thermal

Kearfott Corporation Div Guidance and Navigation Division · NSN 5945-00-665-7445 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-665-7445 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-665-7445. Primary manufacturer part number: 121163-1.
Features
  • Relay,thermal — FSC 5945
  • Contact Maximum Voltage Rating in Volts: 115.0 AC
  • Contact Maximum Current Rating in Amps: 6.0 AC
  • Delay Time in Seconds: 300.0 ADJUSTABLE OPERATE NOMINAL
  • Heater Voltage Rating in Volts: 27.5
  • Environmental Protection: HERMETIC
  • Heater Power Rating in Watts: 4.0
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-665-7445, 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 Kearfott Corporation Div Guidance and Navigation Division. Government technical data includes 10 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-665-7445
Primary Part Number121163-1
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerKearfott Corporation Div Guidance and Navigation Division
StatusCANCELLED
Contact Maximum Voltage Rating in Volts115.0 AC
Contact Maximum Current Rating in Amps6.0 AC
Delay Time in Seconds300.0 ADJUSTABLE OPERATE NOMINAL
Heater Voltage Rating in Volts27.5
Environmental ProtectionHERMETIC
Heater Power Rating in Watts4.0
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Terminal Type and Quantity7 PIN
Overall Diameter0.797 INCHES NOMINAL IN
Mounting Facility Type and Quantity1 PLUG-IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5998-00-442-0122121163-1 INTERCHANGEABLE
Circuit Card Assembly
Bae Systems Information and Electronic Systems Integration Inc.
5945-00-827-4688B8105 INTERCHANGEABLE
Relay,thermal
Meggitt (new Hampshire), Inc
5995-01-578-5989121163-1 INTERCHANGEABLE
Cable Assembly,special Purpose,e
L3 Technologies, Inc. Div Communication Systems-West
Cross-Reference Index
Part NumberManufacturer
121163-1 PRIMARY Kearfott Corporation Div Guidance and Navigation Division (USA)
RM160N028 Radiodetection, Llc (USA)
RM160-28V300SN0 Radiodetection, Llc (USA)
Related Parts
5998-00-442-0122INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
121163-1
5945-00-827-4688INTERCHANGEABLE
RELAY,THERMAL
B8105
5995-01-578-5989INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
121163-1

Frequently Asked Questions

What is NSN 5945-00-665-7445?

NSN 5945-00-665-7445 is a Relay,thermal, manufactured by Kearfott Corporation Div Guidance and Navigation Division, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-665-7445?

NSN 5945-00-665-7445 has 3 cross-referenced part numbers: 121163-1 (Kearfott Corporation Div Guidance and Navigation Division), RM160N028 (Radiodetection, Llc), RM160-28V300SN0 (Radiodetection, Llc).

What NSN replaces 5945-00-665-7445?

There are 3 known substitutes for 5945-00-665-7445: 5998-00-442-0122, 5945-00-827-4688, 5995-01-578-5989. Verify interchangeability with system specifications before substitution.

What are the specifications of 121163-1?

Key specifications for 121163-1: Overall Length: 2.375 INCHES NOMINAL IN; Contact Maximum Voltage Rating in Volts: 115.0 AC; Contact Maximum Current Rating in Amps: 6.0 AC; Delay Time in Seconds: 300.0 ADJUSTABLE OPERATE NOMINAL. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-665-7445 still in active supply?

NSN 5945-00-665-7445 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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