RNF14FTD255R Equivalent & Substitute Parts

Part Overview

The RNF14FTD255R is a 255 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 989 units in current inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained while accommodating design flexibility, supply chain optimization, or enhanced performance characteristics.

Substiute Parts

RNF14FTD255R

Stackpole Electronics IncIn Stock: 1060RNF14FTD255R Datasheet

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CMF55255R00FHEB

Vishay DaleIn Stock: 2143CMF55255R00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTD255R is determined by the following criteria:

Mandatory Matching Parameters:

• Resistance value: 255 Ohms
• Tolerance: ±1%
• Composition: Metal Film
• Package: Axial through-hole configuration
• Termination count: 2

Allowable Variation Parameters:

• Power rating: Equal or greater than 0.25W
• Operating temperature range: Must encompass or exceed -55°C ~ 155°C
• Temperature coefficient: Equal or lower absolute value
• Physical dimensions: Minor variations acceptable within axial package constraints
• Packaging format: Tape & Reel or Cut Tape formats are interchangeable for component-level substitution

The CMF55255R00FHEB qualifies as a direct substitute based on matching all mandatory parameters while providing enhanced specifications in power rating (0.5W vs 0.25W) and operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C).

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTD255R and CMF55255R00FHEB maintain Active product status and full compliance with ROHS3 and REACH regulatory requirements. Selection between these components should be based on application-specific power dissipation requirements and thermal environment constraints.

The RNF14FTD255R is appropriate for applications where the 0.25W power rating is sufficient and space constraints favor the smaller physical footprint (0.093" Dia x 0.250" L).

The CMF55255R00FHEB provides enhanced thermal performance through its 0.5W power rating and extended operating temperature range to 175°C, along with improved temperature stability (±50ppm/°C vs ±100ppm/°C) and moisture resistance features. This substitute is suitable for applications requiring higher power dissipation capability, extended temperature operation, or enhanced environmental protection.

Both components are suitable for direct substitution in circuit designs where the specified electrical and mechanical parameters are met.

Frequently Asked Questions (FAQ)

Q: Can CMF55255R00FHEB replace RNF14FTD255R in any application?

A: Yes, provided the circuit board layout accommodates the physical dimensions (CMF55255R00FHEB: 0.090" Dia x 0.240" L vs RNF14FTD255R: 0.093" Dia x 0.250" L) and the application does not require the specific packaging format (Tape & Reel vs Cut Tape). The electrical specifications are compatible.

Q: What is the significance of the power rating difference?

A: The CMF55255R00FHEB is rated at 0.5W compared to the RNF14FTD255R at 0.25W. This means the substitute can safely dissipate twice the power without exceeding temperature limits. In applications where power dissipation is below 0.25W, both components perform identically. In applications approaching or exceeding 0.25W dissipation, the substitute provides additional thermal margin.

Q: Are there packaging compatibility considerations?

A: The RNF14FTD255R is supplied in Tape & Reel format, while the CMF55255R00FHEB is supplied in Cut Tape format. Both are axial through-hole components suitable for manual or automated assembly. Format selection depends on production volume and assembly equipment capabilities.

Q: How do temperature coefficients affect circuit performance?

A: The CMF55255R00FHEB has a lower temperature coefficient (±50ppm/°C vs ±100ppm/°C), meaning its resistance value remains more stable across temperature variations. For precision applications operating across wide temperature ranges, the substitute provides improved stability.

Q: Are both components compliant with current regulations?

A: Yes. Both the RNF14FTD255R and CMF55255R00FHEB are ROHS3 Compliant and REACH Unaffected, meeting current environmental and safety regulations for electronic components.