RNF14FTD255K Equivalent & Substitute Parts

Part Overview

The RNF14FTD255K is a 255 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component is currently active in production and widely used in general-purpose electronic applications requiring precision resistive elements with flame retardant coating and safety features. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility exist, enabling procurement flexibility and supply chain continuity.

Substiute Parts

RNF14FTD255K

Stackpole Electronics IncIn Stock: 884RNF14FTD255K Datasheet

Current PartRFQ

CMF55255K00FHEB

Vishay DaleIn Stock: 2101CMF55255K00FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTD255K is determined by the following criteria:

Mandatory Matching Parameters:

• Resistance value: 255 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package: Axial through-hole
• Regulatory compliance: ROHS3 Compliant

Allowable Variations:

• Power rating: Equal to or greater than 0.25W
• Temperature coefficient: Equal to or lower absolute value
• Operating temperature range: Equal to or exceeding the specified range
• Physical dimensions: Minor variations acceptable within standard axial package tolerances
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for component-level selection

The CMF55255K00FHEB qualifies as a substitute because it maintains identical resistance, tolerance, and composition specifications while offering enhanced performance characteristics in power rating, temperature stability, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTD255K and CMF55255K00FHEB are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

The CMF55255K00FHEB offers performance advantages including doubled power dissipation capacity (0.5W vs 0.25W), improved temperature stability (±50ppm/°C vs ±100ppm/°C), extended operating temperature range (175°C vs 155°C maximum), and moisture resistance features. These characteristics make it suitable for applications requiring enhanced thermal performance or operation in moisture-prone environments.

Selection between these parts should be based on application-specific thermal requirements, available board space, and supply availability. Both components are electrically and mechanically compatible for direct substitution in standard axial resistor footprints.

Frequently Asked Questions (FAQ)

Q: Can CMF55255K00FHEB replace RNF14FTD255K in existing designs?

A: Yes. Both components share identical resistance (255 kOhms), tolerance (±1%), composition (metal film), and axial package configuration. The substitute offers equal or superior performance across all specified parameters.

Q: What are the physical dimension differences?

A: The CMF55255K00FHEB is slightly smaller (0.090" diameter vs 0.093", 0.240" length vs 0.250"). These minor variations fall within standard axial package tolerances and do not affect PCB footprint compatibility.

Q: Does the higher power rating of the substitute affect circuit operation?

A: No. A component rated for higher power dissipation (0.5W vs 0.25W) operates identically in circuits designed for the lower rating. The higher rating provides additional thermal margin and reliability.

Q: Are there packaging format differences?

A: The main part is supplied in Tape & Reel (TR) format while the substitute is in Cut Tape (CT) format. Both formats contain identical components and are suitable for component-level selection and manual assembly.

Q: Do both parts meet current compliance standards?

A: Yes. Both RNF14FTD255K and CMF55255K00FHEB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.