PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

510999-9Relay,thermal

Instruments and Flight Research, Inc. · NSN 5945-00-518-9206 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-518-9206 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-518-9206. Primary manufacturer part number: 510999-9.
Features
  • Relay,thermal — FSC 5945
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY CLOSED
  • Heater Voltage Rating in Volts: 26.5
  • Contact Maximum Voltage Rating in Volts: 230.0 AC
  • Environmental Protection: HERMETIC
  • Delay Time in Seconds: 3.0 FIXED OPERATE MINIMUM AND 7.0 FIXED OPERATE MAXIMUM
  • Overall Diameter: 1.271 INCHES MINIMUM AND 1.301 INCHES MAXIMUM IN
  • Terminal Type and Quantity: 7 PIN
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-518-9206, 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 Instruments and Flight Research, Inc.. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-518-9206
Primary Part Number510999-9
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerInstruments and Flight Research, Inc.
StatusCANCELLED
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY CLOSED
Heater Voltage Rating in Volts26.5
Contact Maximum Voltage Rating in Volts230.0 AC
Environmental ProtectionHERMETIC
Delay Time in Seconds3.0 FIXED OPERATE MINIMUM AND 7.0 FIXED OPERATE MAXIMUM
Overall Diameter1.271 INCHES MINIMUM AND 1.301 INCHES MAXIMUM IN
Terminal Type and Quantity7 PIN
Contact Maximum Current Rating in Amps1.5 AC
Heater Power Rating in Watts3.5
Mounting Facility Type and Quantity1 PLUG-IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
3110-00-100-3632230390 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
5342-00-423-0847 INTERCHANGEABLE
Bracket,brake Sprin
5945-00-773-646727817 INTERCHANGEABLE
Housingbrush Assemb
L3harris Technologies, Inc.
5950-00-926-3131 INTERCHANGEABLE
Coil,radio Frequency
5315-01-147-811627817 INTERCHANGEABLE
Pin,straight,headed
Jay-Em Aerospace Corporation
3455-01-494-100111NR1.5ISOCP50 INTERCHANGEABLE
Insert,cutting Tool
Seco Tools, Llc Dba Seco
5305-01-526-4973278-17 INTERCHANGEABLE
Screw,tapping
Crane Carrier Company, Llc
5120-01-599-705827817 INTERCHANGEABLE
Screwdriver,six Point Tip
Wiha Quality Tools
Cross-Reference Index
Part NumberManufacturer
26-5-5B Instruments and Flight Research, Inc. (USA)
278817 Raytheon Technical Services Company (USA)
510999-9 PRIMARY Instruments and Flight Research, Inc. (USA)
265-5B Instruments and Flight Research, Inc. (USA)
27817 Raytheon Technical Services Company (USA)
26.5-5-SB Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp (USA)
278817 PRIMARY Cae Usa Inc. (USA)
Related Parts
3110-00-100-3632INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
230390
5342-00-423-0847INTERCHANGEABLE
BRACKET,BRAKE SPRIN
5945-00-773-6467INTERCHANGEABLE
HOUSINGBRUSH ASSEMB
27817
5950-00-926-3131INTERCHANGEABLE
COIL,RADIO FREQUENCY
5315-01-147-8116INTERCHANGEABLE
PIN,STRAIGHT,HEADED
27817
3455-01-494-1001INTERCHANGEABLE
INSERT,CUTTING TOOL
11NR1.5ISOCP50
5305-01-526-4973INTERCHANGEABLE
SCREW,TAPPING
278-17
5120-01-599-7058INTERCHANGEABLE
SCREWDRIVER,SIX POINT TIP
27817

Frequently Asked Questions

What is NSN 5945-00-518-9206?

NSN 5945-00-518-9206 is a Relay,thermal, manufactured by Instruments and Flight Research, Inc., classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-518-9206?

NSN 5945-00-518-9206 has 7 cross-referenced part numbers: 26-5-5B (Instruments and Flight Research, Inc.), 278817 (Raytheon Technical Services Company), 510999-9 (Instruments and Flight Research, Inc.), 265-5B (Instruments and Flight Research, Inc.), 27817 (Raytheon Technical Services Company) and 2 more.

What NSN replaces 5945-00-518-9206?

There are 8 known substitutes for 5945-00-518-9206: 3110-00-100-3632, 5342-00-423-0847, 5945-00-773-6467 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 510999-9?

Key specifications for 510999-9: Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY CLOSED; Heater Voltage Rating in Volts: 26.5; Contact Maximum Voltage Rating in Volts: 230.0 AC; Overall Length: 1.625 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-518-9206 still in active supply?

NSN 5945-00-518-9206 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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