RNF14FTD210R Equivalent & Substitute Parts

Part Overview

The RNF14FTD210R is a 210 Ohms ±1% 0.25W (1/4W) through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for general-purpose applications requiring precision resistance values in compact form factors. The part maintains Active product status with 1077 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement while maintaining circuit performance and reliability requirements.

Substiute Parts

RNF14FTD210R

Stackpole Electronics IncIn Stock: 1164RNF14FTD210R Datasheet

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CMF55210R00FHEB

Vishay DaleIn Stock: 1258CMF55210R00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTD210R is determined by the following critical parameters:

Mandatory Matching Criteria:

• Resistance value: 210 Ohms
• Tolerance: ±1%
• Composition: Metal Film
• Package: Axial through-hole configuration
• RoHS compliance: ROHS3 Compliant

Allowable Variations:

• Power rating: Equal or higher than 0.25W
• Operating temperature range: Equal or higher upper limit
• Temperature coefficient: Equal or lower absolute value
• Physical dimensions: Minor variations acceptable within axial package constraints
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for component selection

The CMF55210R00FHEB qualifies as a substitute because it maintains identical resistance, tolerance, and composition specifications while offering enhanced performance characteristics (higher power rating and improved temperature coefficient).

Parameter Comparison

Engineering Selection Recommendations

The CMF55210R00FHEB serves as a direct substitute for the RNF14FTD210R in applications where the main part is unavailable or inventory constraints require alternative sourcing. Both parts maintain ROHS3 compliance and Active product status, ensuring regulatory alignment and long-term availability.

The substitute part offers performance advantages including doubled power dissipation capability (0.5W vs 0.25W), superior temperature stability (±50ppm/°C vs ±100ppm/°C), and extended operating temperature range (-55°C to 175°C vs -55°C to 155°C). These characteristics make the CMF55210R00FHEB suitable for applications with higher thermal stress or stricter tolerance requirements.

Physical dimensions are comparable within axial package tolerances, with the substitute measuring slightly smaller (0.090" Dia x 0.240" L versus 0.093" Dia x 0.250" L), presenting no mechanical compatibility issues in standard through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can CMF55210R00FHEB replace RNF14FTD210R in any circuit application?

A: Yes, the CMF55210R00FHEB is electrically and mechanically compatible as a direct substitute. The identical 210 Ohms ±1% specification ensures equivalent circuit performance. The higher power rating and improved temperature coefficient of the substitute provide equal or superior performance in all standard applications.

Q: What is the significance of the different power ratings (0.25W vs 0.5W)?

A: Power rating indicates maximum continuous power dissipation. The substitute's 0.5W rating provides greater thermal margin in applications with higher current flow or ambient temperature exposure. This does not affect circuit operation when the actual power dissipation remains below the original 0.25W specification.

Q: Are the physical dimensions different enough to cause PCB layout issues?

A: No. Both parts use standard axial through-hole packaging. The CMF55210R00FHEB measures 0.090" Dia x 0.240" L compared to 0.093" Dia x 0.250" L for the RNF14FTD210R. These minor dimensional variations fall within normal axial package tolerances and present no compatibility concerns for standard PCB hole spacing or component placement.

Q: What does the temperature coefficient difference mean for circuit stability?

A: Temperature coefficient (±100ppm/°C vs ±50ppm/°C) measures resistance value drift across temperature ranges. The substitute's lower coefficient indicates superior stability, meaning the resistance value remains closer to the nominal 210 Ohms across the full operating temperature range. This represents an improvement over the main part.

Q: Are both parts RoHS compliant?

A: Yes. Both RNF14FTD210R and CMF55210R00FHEB maintain ROHS3 compliance, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What packaging formats are available for each part?

A: The RNF14FTD210R is supplied in Tape & Reel (TR) format, while the CMF55210R00FHEB is available in Cut Tape (CT) format. Both formats contain identical components and are suitable for component selection; packaging format selection depends on assembly process requirements and inventory management preferences.