RNF14FTC191K Equivalent & Substitute Parts

Part Overview

The RNF14FTC191K is a 191 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 with tight tolerance specifications. The part is currently in active production status with 1041 units available in inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility can be maintained while potentially offering enhanced performance characteristics or improved availability.

Substiute Parts

RNF14FTC191K

Stackpole Electronics IncIn Stock: 1079RNF14FTC191K Datasheet

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CMF55191K00FHEB

Vishay DaleIn Stock: 1308CMF55191K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC191K are identified based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

• Resistance value: 191 kOhms (exact match required)
• Tolerance: ±1% (maintains precision specifications)
• Temperature coefficient: ±50ppm/°C (ensures thermal stability)
• Composition: Metal film (preserves frequency response and noise characteristics)

Mechanical Compatibility Criteria:

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

Regulatory & Compliance Criteria:

• RoHS3 compliance (environmental standards alignment)
• REACH unaffected status (chemical regulation compliance)

The CMF55191K00FHEB from Vishay Dale meets all electrical equivalence requirements and mechanical compatibility standards. The substitute part offers an increased power rating (0.5W vs. 0.25W) and extended maximum operating temperature (175°C vs. 155°C), providing enhanced thermal performance margins while maintaining identical resistance, tolerance, and temperature coefficient specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC191K and CMF55191K00FHEB are active production components with full ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for industrial and commercial applications.

The RNF14FTC191K remains the primary specification when the 0.25W power rating is the design requirement and PCB thermal management is optimized for this dissipation level.

The CMF55191K00FHEB serves as a direct substitute when higher thermal margins are required or when operating conditions approach the upper temperature limits of the original specification. The increased power rating (0.5W) and extended operating temperature range (-55°C ~ 175°C) provide additional design headroom without altering electrical performance. The moisture-resistant feature of the substitute part offers enhanced environmental protection in humid or corrosive applications.

Both parts maintain identical axial package geometry within standard PCB mounting tolerances, ensuring direct mechanical interchangeability in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can CMF55191K00FHEB be used as a direct replacement for RNF14FTC191K?

A: Yes. Both parts share identical resistance value (191 kOhms), tolerance (±1%), temperature coefficient (±50ppm/°C), and axial package configuration. The substitute part meets all electrical and mechanical compatibility requirements for direct substitution in through-hole PCB applications.

Q: What is the primary difference between these two parts?

A: The CMF55191K00FHEB has a higher power rating (0.5W vs. 0.25W) and extended maximum operating temperature (175°C vs. 155°C). Both parts are metal film axial resistors with identical precision specifications.

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

A: The CMF55191K00FHEB has slightly smaller dimensions (0.090" Dia x 0.240" L) compared to the RNF14FTC191K (0.093" Dia x 0.250" L). These differences are within standard through-hole mounting tolerances and do not require PCB redesign.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the RNF14FTC191K and CMF55191K00FHEB are ROHS3 compliant and REACH unaffected, meeting current environmental and chemical regulation requirements.

Q: Which part should be selected for high-temperature applications?

A: The CMF55191K00FHEB is suitable for applications operating up to 175°C. The RNF14FTC191K is rated to 155°C maximum. Selection depends on the specific operating temperature requirements of the application.

Q: Are packaging formats different between these parts?

A: The RNF14FTC191K is supplied in Tape & Reel (TR) format, while the CMF55191K00FHEB is supplied in Cut Tape (CT) format. Both are standard packaging options for through-hole resistor components and do not affect component performance or compatibility.