RNF14FTC665R Equivalent & Substitute Parts

Part Overview

The RNF14FTC665R is a 665 Ohm ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety construction, designed for applications requiring precision resistance with reliable performance across industrial temperature ranges. The part is currently active in production with ROHS3 compliance and is suitable for general-purpose electronic circuit applications where stable resistance values and low temperature coefficient are required.

Substiute Parts

RNF14FTC665R

Stackpole Electronics IncIn Stock: 1060RNF14FTC665R Datasheet

Current PartRFQ

CMF55665R00FHEB

Vishay DaleIn Stock: 2124CMF55665R00FHEB Datasheet

UpgradeRFQ

CMF50665R00FHEB

Vishay DaleIn Stock: 1406CMF50665R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RNF14FTC665R is determined by strict equivalence in the following electrical and mechanical parameters: resistance value (665 Ohms), tolerance (±1%), composition (metal film), temperature coefficient (±50ppm/°C), axial package configuration, and compliance certifications (ROHS3).

The substitute parts identified maintain identical resistance and tolerance specifications. Power rating variations are permitted when the substitute part meets or exceeds the original specification, as higher power ratings provide equivalent or improved performance in the same circuit application. Operating temperature range extensions are acceptable substitutions provided the minimum temperature does not fall below the original specification.

Two substitute parts are identified:

• CMF50665R00FHEB: Manufacturer-recommended direct equivalent with identical power rating (0.25W) and improved operating temperature range (-55°C to 175°C)
• CMF55665R00FHEB: Upgrade option with increased power rating (0.5W) and extended operating temperature range (-55°C to 175°C)

Parameter Comparison

Engineering Selection Recommendations

CMF50665R00FHEB is the manufacturer-recommended substitute, providing direct electrical and mechanical equivalence to the RNF14FTC665R. This part maintains identical power rating (0.25W) and resistance specifications while offering an extended operating temperature range (-55°C to 175°C versus -55°C to 155°C). Both parts are ROHS3 compliant and REACH unaffected, ensuring regulatory compatibility. The CMF50 series includes moisture-resistant construction, providing enhanced environmental protection in the same axial package footprint.

CMF55665R00FHEB serves as an upgrade option when circuit design permits increased power dissipation capacity. The 0.5W rating provides additional thermal margin in applications where the original 0.25W specification may approach maximum dissipation limits. This part maintains all electrical parameters and compliance certifications while offering the same extended temperature range as the CMF50 equivalent.

Both substitute parts are active products with confirmed inventory availability and are suitable for direct replacement in applications currently using the RNF14FTC665R.

Frequently Asked Questions (FAQ)

Q: Can CMF50665R00FHEB be used as a direct replacement for RNF14FTC665R?

A: Yes. The CMF50665R00FHEB maintains identical resistance (665 Ohms), tolerance (±1%), power rating (0.25W), composition (metal film), and temperature coefficient (±50ppm/°C). The extended operating temperature range (-55°C to 175°C) is a performance enhancement. Both parts use axial through-hole packaging and are ROHS3 compliant.

Q: What is the difference between CMF50665R00FHEB and CMF55665R00FHEB?

A: The primary difference is power rating. CMF50665R00FHEB is rated at 0.25W (matching the original RNF14FTC665R), while CMF55665R00FHEB is rated at 0.5W. All other electrical parameters are identical. The higher power rating of the CMF55 provides increased thermal capacity for applications with higher dissipation requirements.

Q: Are there physical size differences between these parts?

A: Yes. RNF14FTC665R measures 0.093" diameter × 0.250" length (2.35mm × 6.35mm). CMF50665R00FHEB measures 0.065" diameter × 0.150" length (1.65mm × 3.81mm). CMF55665R00FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). These dimensional variations are within standard axial resistor tolerances and do not affect electrical performance or circuit board layout compatibility for through-hole applications.

Q: Do all three parts meet the same compliance requirements?

A: Yes. RNF14FTC665R, CMF50665R00FHEB, and CMF55665R00FHEB are all ROHS3 compliant and REACH unaffected. All parts carry EAR99 ECCN classification and 8533.21.0090 HTSUS code.

Q: Which substitute should be selected for new designs?

A: CMF50665R00FHEB is the manufacturer-recommended equivalent for direct replacement. For applications where thermal margin is beneficial or where higher dissipation is anticipated, CMF55665R00FHEB provides the same electrical performance with increased power capacity.