RNF14FTC392K Equivalent & Substitute Parts

Part Overview

The RNF14FTC392K is a 392 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component is classified as Active product status with ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

RNF14FTC392K

Stackpole Electronics IncIn Stock: 997RNF14FTC392K Datasheet

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CMF55392K00FHEB

Vishay DaleIn Stock: 2516CMF55392K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the RNF14FTC392K is determined by the following criteria:

• Resistance value: 392 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Power Rating: Equal to or greater than 0.25W
• Operating Temperature Range: Must encompass or exceed -55°C ~ 155°C
• Compliance: ROHS3 Compliant (minimum requirement)

The CMF55392K00FHEB from Vishay Dale meets all substitution criteria with a higher power rating (0.5W) and extended upper operating temperature limit (175°C), making it suitable for applications requiring the RNF14FTC392K.

Parameter Comparison

Engineering Selection Recommendations

The CMF55392K00FHEB is electrically and mechanically compatible with the RNF14FTC392K for direct substitution. Both components maintain identical resistance, tolerance, temperature coefficient, and axial package configuration. The substitute part provides increased power dissipation capability (0.5W versus 0.25W) and extended operating temperature range to 175°C. Both parts are ROHS3 compliant and carry equivalent safety certifications. Selection between these parts depends on application power requirements and thermal operating conditions within the specified ranges.

Frequently Asked Questions (FAQ)

Q: Can the CMF55392K00FHEB replace the RNF14FTC392K in all applications?

A: Yes, the CMF55392K00FHEB is electrically equivalent with identical resistance, tolerance, and temperature coefficient. The higher power rating and extended temperature range provide additional design margin. Physical dimensions are comparable for axial through-hole mounting.

Q: What is the difference in power rating between these parts?

A: The RNF14FTC392K is rated at 0.25W (1/4W), while the CMF55392K00FHEB is rated at 0.5W (1/2W). The substitute part can dissipate twice the power, making it suitable for higher current applications or environments with elevated ambient temperatures.

Q: Are the physical dimensions compatible for PCB mounting?

A: Both parts use axial through-hole packaging. The RNF14FTC392K measures 0.093" Dia x 0.250" L (2.35mm x 6.35mm), while the CMF55392K00FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). These dimensions are sufficiently similar for standard axial component footprints.

Q: Do both parts meet the same compliance standards?

A: Yes, both the RNF14FTC392K and CMF55392K00FHEB are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both carry flame retardant coating and safety certifications appropriate for metal film resistors.

Q: What is the operating temperature difference?

A: The RNF14FTC392K operates from -55°C to 155°C, while the CMF55392K00FHEB extends to 175°C. The substitute part provides 20°C additional upper temperature margin, beneficial for high-temperature applications.