RNF14FTC324K Equivalent & Substitute Parts

Part Overview

The RNF14FTC324K is a 324 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is designed for general-purpose applications requiring precision resistance with flame retardant coating and safety features. The part maintains Active product status with ROHS3 compliance and operates across the temperature range of -55°C to 155°C. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility can be maintained while potentially offering enhanced performance characteristics or improved availability.

Substiute Parts

RNF14FTC324K

Stackpole Electronics IncIn Stock: 723RNF14FTC324K Datasheet

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CMF55324K00FHEB

Vishay DaleIn Stock: 2423CMF55324K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC324K is determined by the following critical parameters:

• Resistance value must equal 324 kOhms
• Tolerance must be ±1% or tighter
• Composition must be metal film
• Package must be axial configuration
• Temperature coefficient must be ±50ppm/°C or better
• Operating temperature range must encompass or exceed -55°C ~ 155°C
• RoHS3 compliance required
• Flame retardant coating and safety features required

The CMF55324K00FHEB from Vishay Dale meets all substitution criteria. This part maintains identical electrical specifications while offering an increased power rating of 0.5W (1/2W) and an extended upper operating temperature of 175°C, providing enhanced thermal margin for demanding applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC324K and CMF55324K00FHEB maintain Active product status with full ROHS3 compliance and REACH unaffected designation. The CMF55324K00FHEB is suitable as a direct substitute where circuit design permits the higher power rating and extended temperature range. The increased power dissipation capability of the 0.5W rating provides additional thermal headroom in applications where the original 0.25W specification may approach design limits. The moisture-resistant feature of the substitute part offers enhanced environmental protection in humid or corrosive operating conditions. Both parts are certified for equivalent electrical performance with identical resistance, tolerance, and temperature coefficient specifications.

Frequently Asked Questions (FAQ)

Q: Can the CMF55324K00FHEB replace the RNF14FTC324K in all applications?

A: The CMF55324K00FHEB is electrically and mechanically compatible as a substitute. The higher power rating (0.5W vs 0.25W) and extended temperature range (-55°C ~ 175°C vs -55°C ~ 155°C) make it suitable for applications where the original part is specified, provided circuit board layout accommodates the slightly different physical dimensions.

Q: What are the physical dimension differences between these parts?

A: The RNF14FTC324K measures 0.093" diameter × 0.250" length (2.35mm × 6.35mm). The CMF55324K00FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). Both are axial package configuration with 2 terminations. The dimensional difference is minimal and typically accommodated within standard PCB hole spacing.

Q: Are both parts suitable for high-temperature applications?

A: The RNF14FTC324K operates to 155°C maximum. The CMF55324K00FHEB extends to 175°C, providing 20°C additional thermal margin. For applications approaching 155°C, the substitute part offers improved reliability through extended temperature capability.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Compliance certifications are equivalent between the main part and substitute.

Q: What is the significance of the moisture-resistant feature in the substitute part?

A: The CMF55324K00FHEB includes moisture-resistant coating in addition to flame retardant properties. This feature provides enhanced protection in applications exposed to humidity, condensation, or corrosive environments, extending component reliability beyond the base flame retardant specification of the main part.