RNF14FTC25K5 Equivalent & Substitute Parts

Part Overview

The RNF14FTC25K5 is a 25.5 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 active in production with 655 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

RNF14FTC25K5

Stackpole Electronics IncIn Stock: 750RNF14FTC25K5 Datasheet

Current PartRFQ

CMF5525K500FHEB

Vishay DaleIn Stock: 1603CMF5525K500FHEB Datasheet

UpgradeRFQ

CMF5025K500FHEB

Vishay DaleIn Stock: 1896CMF5025K500FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC25K5 are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 25.5 kOhms
• Tolerance: ±1%
• Temperature coefficient: ±50ppm/°C
• Composition: Metal Film

Mechanical Parameters (Must Match):

• Package type: Axial through-hole
• Number of terminations: 2

Allowed Variations:

• Power rating: May be equal or higher than 0.25W
• Operating temperature range: May be equal or extended
• Physical dimensions: May vary within axial package constraints
• Packaging format: Cut Tape (CT) or Tape & Reel (TR) acceptable

Compliance Requirements:

• RoHS3 Compliant
• REACH Unaffected status

Parameter Comparison

Engineering Selection Recommendations

CMF5025K500FHEB (MFR Recommended): This substitute maintains identical electrical specifications and power rating to the RNF14FTC25K5 while offering extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C). The part is manufactured by Vishay Dale, an established supplier in the metal film resistor category. Both parts are ROHS3 compliant and REACH unaffected. Physical dimensions are smaller, which may provide layout advantages in space-constrained applications. This part is recommended for direct replacement in applications where the original specification is maintained.

CMF5525K500FHEB (Upgrade): This substitute provides higher power dissipation capability (0.5W versus 0.25W) while maintaining all electrical parameters. The extended operating temperature range (-55°C ~ 175°C) and moisture-resistant features provide enhanced environmental performance. This option is suitable for applications requiring increased thermal margin or enhanced reliability in humid environments. Physical dimensions are comparable to the main part.

Both substitute parts carry active product status and demonstrate higher inventory availability, supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can CMF5025K500FHEB replace RNF14FTC25K5 in all applications? A: Yes, provided the application does not require the specific physical dimensions of the original part. The CMF5025K500FHEB is significantly smaller (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L) and may not fit in PCB layouts designed for the larger axial package. Verify board layout compatibility before substitution.

Q: What is the difference between the two substitute parts? A: CMF5525K500FHEB is rated at 0.5W (1/2W) power dissipation, while CMF5025K500FHEB matches the original 0.25W (1/4W) rating. Both maintain identical resistance, tolerance, and temperature coefficient specifications. CMF5525K500FHEB offers higher thermal capacity and is suitable for applications with greater power dissipation requirements.

Q: Are the substitute parts compatible with the original packaging? A: The RNF14FTC25K5 is supplied in Tape & Reel (TR) format. CMF5525K500FHEB and CMF5025K500FHEB are supplied in Cut Tape (CT) format. Both packaging formats are standard for through-hole axial resistors and are compatible with automated assembly equipment. Verify your assembly process requirements before ordering.

Q: Do the substitute parts meet the same compliance standards? A: Yes. All three parts are ROHS3 compliant and REACH unaffected. Temperature coefficient specifications are identical at ±50ppm/°C across all parts.

Q: What is the impact of the extended operating temperature range in the substitute parts? A: The substitute parts support operation up to 175°C versus 155°C for the original part. This provides additional thermal margin in high-temperature applications. If your application operates within the original -55°C ~ 155°C range, this extended capability provides no functional benefit but does not introduce compatibility issues.