RNF14FAD18K7 Equivalent & Substitute Parts

Part Overview

The RNF14FAD18K7 is an 18.7 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is classified as Active product status with ROHS3 compliance and is suitable for general-purpose electronic circuit applications requiring precision resistance values with flame retardant coating and safety features.

Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when design requirements permit higher power ratings or improved performance characteristics within the same electrical specification range.

Substiute Parts

RNF14FAD18K7

Stackpole Electronics IncIn Stock: 829RNF14FAD18K7 Datasheet

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CMF5518K700FHEB

Vishay DaleIn Stock: 7114CMF5518K700FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CMF5518K700FHEB qualifies as a substitute for the RNF14FAD18K7 based on the following critical parameters:

• Resistance Value: Both parts specify 18.7 kOhms, ensuring identical electrical function
• Tolerance: Both maintain ±1% tolerance, preserving circuit accuracy requirements
• Composition: Both are metal film resistors, maintaining equivalent noise and stability characteristics
• Package Configuration: Both use axial through-hole package, ensuring mechanical compatibility with existing PCB layouts
• Compliance: Both are ROHS3 compliant and REACH unaffected, meeting regulatory requirements

The substitute part offers enhanced specifications including higher power rating (0.5W vs 0.25W), improved temperature coefficient (±50ppm/°C vs ±100ppm/°C), extended operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C), and moisture-resistant features, making it suitable for applications requiring greater thermal margin or enhanced environmental protection.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FAD18K7 and CMF5518K700FHEB are Active product status components with full ROHS3 compliance and REACH unaffected status, qualifying them for use in regulated applications.

The RNF14FAD18K7 is the primary selection when the 0.25W power rating is sufficient for the circuit design and when Stackpole Electronics Inc sourcing is preferred.

The CMF5518K700FHEB serves as a direct substitute when higher power dissipation capability is required, when improved temperature stability (lower temperature coefficient) is beneficial, or when extended operating temperature range to 175°C is necessary. The moisture-resistant feature provides additional environmental protection in applications exposed to humidity or condensation.

Both parts maintain identical electrical function at the specified 18.7 kOhms ±1% resistance value and are mechanically compatible in axial through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can CMF5518K700FHEB replace RNF14FAD18K7 in existing designs?

A: Yes. Both parts share identical resistance value (18.7 kOhms), tolerance (±1%), composition (metal film), and axial package configuration. The substitute offers higher power rating and improved temperature coefficient, making it electrically and mechanically compatible.

Q: What is the primary difference between these parts?

A: The main difference is power rating: RNF14FAD18K7 is rated at 0.25W while CMF5518K700FHEB is rated at 0.5W. The substitute also features improved temperature coefficient (±50ppm/°C vs ±100ppm/°C), extended operating temperature range, and moisture-resistant properties.

Q: Are both parts compliant with current regulations?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

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

A: No. Higher power rating does not negatively affect circuit performance. It provides additional thermal margin and allows the component to operate safely in applications with higher power dissipation requirements.

Q: Are the physical dimensions compatible for PCB layout?

A: Both parts use axial through-hole package configuration. Dimensions are similar (RNF14FAD18K7: 0.093" Dia x 0.250" L; CMF5518K700FHEB: 0.090" Dia x 0.240" L), ensuring compatibility with standard axial component footprints.

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

A: CMF5518K700FHEB is suitable for applications requiring operation up to 175°C, compared to RNF14FAD18K7 which operates to 155°C. The substitute also provides better temperature stability with lower temperature coefficient.