RNF14FTC25R5 Equivalent & Substitute Parts

Part Overview

The RNF14FTC25R5 is a 25.5 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 applications requiring precision resistance values in compact form factors. The part is currently active in production with 790 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, design flexibility, or application-specific performance needs.

Substiute Parts

RNF14FTC25R5

Stackpole Electronics IncIn Stock: 809RNF14FTC25R5 Datasheet

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CMF5525R500FHEB

Vishay DaleIn Stock: 1418CMF5525R500FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CMF5525R500FHEB from Vishay Dale qualifies as a substitute based on the following critical parameters:

Electrical equivalence is established through matching resistance value (25.5 Ohms) and tolerance (±1%). Both parts utilize metal film composition with identical temperature coefficient (±50ppm/°C), ensuring consistent performance across thermal ranges.

Mechanical compatibility is confirmed through axial package configuration with comparable physical dimensions (RNF14FTC25R5: 0.093" Dia × 0.250" L; CMF5525R500FHEB: 0.090" Dia × 0.240" L). Both maintain two terminations for standard through-hole PCB mounting.

The substitute part features enhanced power rating (0.5W vs 0.25W) and extended operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C), providing design margin without compromising electrical characteristics. Both parts maintain ROHS3 compliance and identical HTSUS classification.

Parameter Comparison

Engineering Selection Recommendations

The CMF5525R500FHEB serves as a direct substitute for the RNF14FTC25R5 in applications where the primary electrical and mechanical requirements are met. Selection between these parts should be based on:

Power dissipation requirements: The RNF14FTC25R5 is suitable for circuits dissipating up to 0.25W. Applications requiring higher power handling or thermal margin should utilize the CMF5525R500FHEB with its 0.5W rating.

Temperature environment: The RNF14FTC25R5 operates to 155°C maximum. Designs requiring operation above this threshold or with extended thermal margin should specify the CMF5525R500FHEB, rated to 175°C.

Moisture exposure: The CMF5525R500FHEB includes moisture-resistant construction, making it preferable for applications in humid or corrosive environments.

Both parts maintain active production status, ROHS3 compliance, and identical electrical characteristics (resistance, tolerance, temperature coefficient). Physical dimensions are comparable, supporting direct PCB layout compatibility in standard through-hole designs.

Frequently Asked Questions (FAQ)

Can CMF5525R500FHEB replace RNF14FTC25R5 in existing designs?

Yes. Both parts share identical resistance (25.5 Ohms), tolerance (±1%), temperature coefficient (±50ppm/°C), and axial package configuration. Physical dimensions are comparable (within 0.003" diameter and 0.010" length), supporting direct PCB mounting compatibility.

What are the key differences between these parts?

The primary differences are power rating (0.25W vs 0.5W) and maximum operating temperature (155°C vs 175°C). The substitute includes moisture-resistant construction. These represent enhancements rather than limitations.

Are there packaging differences?

The RNF14FTC25R5 is supplied in Tape & Reel (TR) format, while the CMF5525R500FHEB is supplied in Cut Tape (CT) format. Both are standard through-hole axial packages suitable for automated and manual assembly.

Do both parts meet compliance requirements?

Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under identical HTSUS code 8533.21.0090. Both carry EAR99 ECCN classification.

Which part should be selected for new designs?

For new designs, the CMF5525R500FHEB is recommended due to its higher power rating, extended temperature range, and moisture-resistant construction, providing greater design margin without cost or performance penalty.