PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RA43L1Resistor,thermal

Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems · NSN 5905-00-923-9766 · FSC 5905 · No Item Name Available
Verified by PartsTable
NSN 5905-00-923-9766 — this item is cataloged by the U.S. Government under National Stock Number 5905-00-923-9766. Primary manufacturer part number: RA43L1.
Features
  • Resistor,thermal — FSC 5905
  • Temp Points for Resistance Readings at Zero Power: -60.0 CELSIUS FIRST RESISTANCE-TEMPERATURE POINT DEGC
  • Zero Power Resistance at Specified Temp: 25.4 KILOHMS FOURTH RESISTANCE-TEMPERATURE POINT
  • Zero Power Resistance at Specified Temp: 585.9 OHMS EIGHTH RESISTANCE-TEMPERATURE POINT
  • Temp Points for Resistance Readings at Zero Power: 30.0 CELSIUS FOURTH RESISTANCE-TEMPERATURE POINT DEGC
  • Body Length: 0.875 INCHES NOMINAL IN
  • Temp Points for Resistance Readings at Zero Power: 60.0 CELSIUS FIFTH RESISTANCE-TEMPERATURE POINT DEGC
  • Zero Power Resistance at Specified Temp: 4.4 MEGOHMS FIRST RESISTANCE-TEMPERATURE POINT
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
General Description

The Resistor,thermal, cataloged under National Stock Number 5905-00-923-9766, is classified within Federal Supply Class 5905 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5905-00-923-9766
Primary Part NumberRA43L1
Item NameResistor,thermal
FSC / FSG5905 / 59 — No Item Name Available
ManufacturerKidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems
StatusACTIVE
Temp Points for Resistance Readings at Zero Power-60.0 CELSIUS FIRST RESISTANCE-TEMPERATURE POINT DEGC
Zero Power Resistance at Specified Temp25.4 KILOHMS FOURTH RESISTANCE-TEMPERATURE POINT
Zero Power Resistance at Specified Temp585.9 OHMS EIGHTH RESISTANCE-TEMPERATURE POINT
Temp Points for Resistance Readings at Zero Power30.0 CELSIUS FOURTH RESISTANCE-TEMPERATURE POINT DEGC
Body Length0.875 INCHES NOMINAL IN
Temp Points for Resistance Readings at Zero Power60.0 CELSIUS FIFTH RESISTANCE-TEMPERATURE POINT DEGC
Zero Power Resistance at Specified Temp4.4 MEGOHMS FIRST RESISTANCE-TEMPERATURE POINT
Zero Power Resistance Tolerance in Percent at Reference Temp-10.0 TO 10.0
Maximum Operating Temp300.0 CELSIUS DEGC
Resistance Tolerance at a Specified Temp in Percent-11.2 TO 11.2 FOURTH RESISTANCE-TEMPERATURE POINT
Power Dissipation Constant in Milliwatts Per Deg Celsius4.0
Ambient Temp at Full Rated Power50.0 CELSIUS DEGC
Temp Points for Resistance Readings at Zero Power300.0 CELSIUS TENTH RESISTANCE-TEMPERATURE POINT DEGC
Terminal Diameter0.020 INCHES NOMINAL IN
Zero Power Resistance at Specified Temp2.9 KILOHMS SIXTH RESISTANCE-TEMPERATURE POINT
Temp Points for Resistance Readings at Zero Power-30.0 CELSIUS SECOND RESISTANCE-TEMPERATURE POINT DEGC
Resistance Tolerance at a Specified Temp in Percent-17.4 TO 17.4 THIRD RESISTANCE-TEMPERATURE POINT
Zero Power Resistance31.500 KILOHMS
Temp Points for Resistance Readings at Zero Power90.0 CELSIUS SIXTH RESISTANCE-TEMPERATURE POINT DEGC
Resistance Tolerance at a Specified Temp in Percent-12.9 TO 12.9 FIFTH RESISTANCE-TEMPERATURE POINT
Temp Points for Resistance Readings at Zero Power150.0 CELSIUS EIGHTH RESISTANCE-TEMPERATURE POINT DEGC
Zero Power Resistance at Specified Temp1.2 KILOHMS SEVENTH RESISTANCE-TEMPERATURE POINT
Resistance Tolerance at a Specified Temp in Percent-21.6 TO 21.6 FIRST RESISTANCE-TEMPERATURE POINT
Zero Power Resistance at Specified Temp557.0 KILOHMS SECOND RESISTANCE-TEMPERATURE POINT
Zero Power Temp Coefficient of Resistance in Percent Per Deg Celsius-4.40
Terminal Length1.375 INCHES NOMINAL IN
Body Outside Diameter0.110 INCHES NOMINAL IN
Thermal Time Constant in Seconds70.0
Inclosure TypeENCAPSULATED
Zero Power Resistance at Specified Temp206.0 OHMS NINTH RESISTANCE-TEMPERATURE POINT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5905-00-295-4912 INTERCHANGEABLE
Resistor,thermal
Cross-Reference Index
Part NumberManufacturer
RA43L1 PRIMARY Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems (USA)
Related Parts
5905-00-295-4912INTERCHANGEABLE
RESISTOR,THERMAL

Frequently Asked Questions

What is NSN 5905-00-923-9766?

NSN 5905-00-923-9766 is a Resistor,thermal, manufactured by Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems, classified under FSC 5905 (No Item Name Available). Status: active.

What are the part numbers for NSN 5905-00-923-9766?

NSN 5905-00-923-9766 has 1 cross-referenced part number: RA43L1 (Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems).

What NSN replaces 5905-00-923-9766?

There is 1 known substitute for 5905-00-923-9766: 5905-00-295-4912. Verify interchangeability with system specifications before substitution.

What are the specifications of RA43L1?

Key specifications for RA43L1: Temp Points for Resistance Readings at Zero Power: -60.0 CELSIUS FIRST RESISTANCE-TEMPERATURE POINT DEGC; Zero Power Resistance at Specified Temp: 25.4 KILOHMS FOURTH RESISTANCE-TEMPERATURE POINT; Zero Power Resistance at Specified Temp: 585.9 OHMS EIGHTH RESISTANCE-TEMPERATURE POINT; Temp Points for Resistance Readings at Zero Power: 30.0 CELSIUS FOURTH RESISTANCE-TEMPERATURE POINT DEGC. 30 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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