RNF14FTC511K Equivalent & Substitute Parts

Part Overview

The RNF14FTC511K is a 511 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements permit tolerance of variations in power rating, operating temperature range, or packaging format while maintaining core electrical specifications.

Substiute Parts

RNF14FTC511K

Stackpole Electronics IncIn Stock: 1104RNF14FTC511K Datasheet

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CMF55511K00FHEB

Vishay DaleIn Stock: 4455CMF55511K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RNF14FTC511K is permissible when the following core electrical parameters remain constant:

• Resistance value: 511 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package type: Axial
• Temperature coefficient: ±50ppm/°C

Variations that are acceptable in substitute parts include:

• Power rating: May be increased from 0.25W to higher ratings (0.5W or greater) without affecting circuit function
• Operating temperature range: May be extended beyond -55°C ~ 155°C
• Physical dimensions: Minor variations in axial length and diameter are acceptable provided the component fits the PCB layout
• Packaging format: Transition from Tape & Reel to Cut Tape or other standard packaging formats

The CMF55511K00FHEB meets all substitution criteria with an increased power rating of 0.5W (1/2W) and extended operating temperature range to -55°C ~ 175°C.

Parameter Comparison

Engineering Selection Recommendations

The CMF55511K00FHEB is a direct functional substitute for the RNF14FTC511K. Both components are Active product status and maintain ROHS3 compliance and REACH unaffected status. The substitute part offers increased power dissipation capability (0.5W versus 0.25W) and an extended maximum operating temperature of 175°C compared to 155°C. The addition of moisture resistance in the CMF55 series provides enhanced environmental protection. Physical dimensions are comparable with negligible differences suitable for standard PCB layouts. Selection between these parts depends on circuit power requirements and thermal operating conditions rather than electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the CMF55511K00FHEB replace the RNF14FTC511K in all applications?

A: Yes, the CMF55511K00FHEB is electrically and mechanically compatible. The higher power rating (0.5W) and extended temperature range (-55°C ~ 175°C) make it suitable for applications where the original part is specified, provided PCB layout accommodates the slightly smaller physical dimensions.

Q: What is the significance of the increased power rating in the substitute part?

A: The CMF55511K00FHEB is rated at 0.5W compared to the RNF14FTC511K at 0.25W. This higher rating provides greater thermal margin and allows operation in circuits with higher power dissipation without exceeding component temperature limits.

Q: Are there packaging differences between these parts?

A: The RNF14FTC511K is supplied in Tape & Reel format, while the CMF55511K00FHEB is supplied in Cut Tape format. Both are standard axial through-hole packages suitable for manual or automated assembly.

Q: Do both parts meet the same compliance standards?

A: Yes, both the RNF14FTC511K and CMF55511K00FHEB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference in physical size between these resistors?

A: The RNF14FTC511K measures 0.093" diameter × 0.250" length, while the CMF55511K00FHEB measures 0.090" diameter × 0.240" length. These dimensions are sufficiently similar for standard PCB layouts designed for axial resistors.