RNF14FTD665R Equivalent & Substitute Parts

Part Overview

The RNF14FTD665R 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-grade construction, designed for applications requiring precision resistance values in compact form factors. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified tolerance and environmental operating ranges.

Substiute Parts

RNF14FTD665R

Stackpole Electronics IncIn Stock: 1198RNF14FTD665R Datasheet

Current PartRFQ

CMF55665R00FHEB

Vishay DaleIn Stock: 2124CMF55665R00FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTD665R is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 665 Ohms (exact match required)
• Tolerance: ±1% (maintains precision specification)
• Composition: Metal Film (ensures stability and temperature performance)

Mechanical Compatibility Requirements:

• Package type: Axial (ensures PCB footprint compatibility)
• Number of terminations: 2 (standard through-hole configuration)

Environmental & Compliance Requirements:

• RoHS3 compliance (regulatory requirement match)
• REACH unaffected status (regulatory requirement match)
• Operating temperature range must encompass or exceed -55°C to 155°C minimum

The CMF55665R00FHEB qualifies as a substitute because it maintains identical resistance, tolerance, and composition specifications while preserving axial package compatibility and regulatory compliance. The higher power rating (0.5W vs 0.25W) and improved temperature coefficient represent performance enhancements suitable for direct substitution in applications where the original part is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTD665R and CMF55665R00FHEB maintain Active product status with full regulatory compliance. Selection between these components should be based on application-specific requirements:

The RNF14FTD665R is appropriate for applications where the 0.25W power rating is sufficient and the specified operating temperature range of -55°C to 155°C meets environmental requirements.

The CMF55665R00FHEB provides enhanced performance characteristics including doubled power dissipation capacity (0.5W), improved temperature coefficient stability (±50ppm/°C vs ±100ppm/°C), and extended operating temperature range to 175°C. The addition of moisture-resistant properties provides supplementary environmental protection. This substitute is suitable for applications requiring higher thermal headroom or operation in elevated temperature environments within the specified range.

Both components satisfy RoHS3 and REACH compliance requirements, ensuring regulatory alignment for current and future applications.

Frequently Asked Questions (FAQ)

Q: Can CMF55665R00FHEB replace RNF14FTD665R in existing designs?

A: Yes. Both components share identical resistance (665 Ohms), tolerance (±1%), composition (metal film), and axial package configuration. The substitute provides equivalent electrical performance with enhanced power rating and temperature stability.

Q: What is the significance of the different power ratings (0.25W vs 0.5W)?

A: Power rating indicates maximum continuous power dissipation. The CMF55665R00FHEB's higher 0.5W rating provides greater thermal margin in applications with higher current flow. This does not affect DC resistance value or tolerance specifications.

Q: Are there physical dimension differences between these parts?

A: Minor dimensional variations exist. RNF14FTD665R measures 0.093" Dia x 0.250" L (2.35mm x 6.35mm); CMF55665R00FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Both maintain standard axial through-hole footprint compatibility on PCBs designed for 0.25W or larger axial resistors.

Q: Do packaging format differences (Tape & Reel vs Cut Tape) affect component performance?

A: Packaging format affects procurement and assembly processes only. Tape & Reel (TR) and Cut Tape (CT) formats contain identical components with no functional or electrical differences.

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

A: The RNF14FTD665R operates to 155°C maximum. The CMF55665R00FHEB extends to 175°C, providing additional margin for elevated temperature environments. Selection depends on specific application temperature requirements.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both components are RoHS3 compliant and REACH unaffected, satisfying current regulatory standards for electronic component manufacturing and use.