RNF14FTC866K Equivalent & Substitute Parts

Part Overview

The RNF14FTC866K is a 866 kOhms ±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 is currently active in production with ROHS3 compliance and maintains full inventory availability. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

RNF14FTC866K

Stackpole Electronics IncIn Stock: 764RNF14FTC866K Datasheet

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CMF55866K00FHEB

Vishay DaleIn Stock: 1039CMF55866K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC866K is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 866 kOhms (exact match required)
• Tolerance: ±1% (equal or tighter tolerance acceptable)
• Temperature coefficient: ±50ppm/°C or better
• Composition: Metal film construction

Mechanical Compatibility Requirements:

• Package type: Axial through-hole
• Number of terminations: 2
• Physical dimensions: Compatible with standard PCB hole spacing

Regulatory & Compliance Requirements:

• RoHS3 compliance mandatory
• REACH unaffected status required
• Active product status

The CMF55866K00FHEB from Vishay Dale meets all substitution criteria with identical electrical specifications and compatible mechanical form factor.

Parameter Comparison

Engineering Selection Recommendations

The CMF55866K00FHEB qualifies as a direct electrical substitute for the RNF14FTC866K based on matching resistance value, tolerance, temperature coefficient, and metal film composition. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection.

The substitute part offers enhanced specifications in two areas: increased power rating (0.5W versus 0.25W) and extended upper operating temperature limit (175°C versus 155°C). These improvements provide additional design margin without introducing incompatibility. The CMF55866K00FHEB includes moisture-resistant features in addition to flame retardant coating, expanding application suitability.

Physical dimensions differ slightly (0.090" Dia x 0.240" L for substitute versus 0.093" Dia x 0.250" L for main part), remaining within standard axial resistor form factor tolerances and compatible with identical PCB hole spacing. Both components feature two terminations and axial package configuration.

Selection between these parts depends on procurement availability, packaging requirements (Tape & Reel versus Cut Tape), and specific application thermal or power dissipation demands.

Frequently Asked Questions (FAQ)

Q: Can the CMF55866K00FHEB replace the RNF14FTC866K in existing designs?

A: Yes. Both components share identical resistance value (866 kOhms), tolerance (±1%), temperature coefficient (±50ppm/°C), and metal film composition. Axial package compatibility and matching termination count (2) ensure mechanical fit on standard PCB layouts. ROHS3 and REACH compliance status are equivalent.

Q: What is the significance of the higher power rating on the substitute part?

A: The CMF55866K00FHEB is rated at 0.5W compared to the RNF14FTC866K at 0.25W. This higher power rating provides additional thermal margin and allows operation in applications with greater power dissipation without exceeding component limits. The substitute part remains suitable for applications designed for the lower-rated main part.

Q: Are there physical dimension differences that affect PCB layout?

A: Minor dimensional variations exist: the substitute measures 0.090" Dia x 0.240" L versus 0.093" Dia x 0.250" L for the main part. These differences fall within standard axial resistor tolerances and do not affect PCB hole spacing or mounting compatibility. Both components use identical lead spacing for through-hole installation.

Q: What packaging formats are available for each part?

A: The RNF14FTC866K is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The CMF55866K00FHEB is available in Cut Tape (CT) format, appropriate for manual or semi-automated handling. Selection depends on production volume and assembly methodology.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the RNF14FTC866K and CMF55866K00FHEB are ROHS3 compliant and REACH unaffected, satisfying equivalent regulatory requirements for component selection in regulated applications.

Q: What additional features does the substitute part provide?

A: The CMF55866K00FHEB includes moisture-resistant properties in addition to flame retardant coating, compared to flame retardant coating and safety features on the main part. This enhancement expands application suitability in humid or moisture-prone environments without affecting electrical equivalence.