RNF14FTC4K64 Equivalent & Substitute Parts

Part Overview

The RNF14FTC4K64 is a 4.64 kOhms ±1% 0.25W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently active in production with 734 units in stock. Substitute parts are necessary when addressing supply constraints, packaging format requirements, or when enhanced thermal performance is required for specific circuit applications.

Substiute Parts

RNF14FTC4K64

Stackpole Electronics IncIn Stock: 803RNF14FTC4K64 Datasheet

Current PartRFQ

CMF554K6400FHEB

Vishay DaleIn Stock: 2136CMF554K6400FHEB Datasheet

UpgradeRFQ

CMF504K6400FHEB

Vishay DaleIn Stock: 1752CMF504K6400FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC4K64 is determined by the following critical parameters:

Core Electrical Parameters (Non-Negotiable):

• Resistance value: 4.64 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Temperature Coefficient: ±50ppm/°C

Allowable Variations:

• Power rating may be equal or higher (0.25W or greater)
• Operating temperature range may be equal or extended
• Package format remains Axial
• Mechanical dimensions may vary within axial package constraints

The substitute parts CMF554K6400FHEB and CMF504K6400FHEB maintain identical electrical specifications while offering enhanced features and extended operating temperature ranges. CMF554K6400FHEB provides increased power dissipation capability (0.5W vs 0.25W), while CMF504K6400FHEB maintains the original 0.25W rating with improved moisture resistance.

Parameter Comparison

Engineering Selection Recommendations

CMF554K6400FHEB Selection Criteria: This substitute is appropriate when circuit design permits higher power dissipation capability. The 0.5W rating provides thermal margin for applications with elevated ambient temperatures or continuous operation. Extended operating temperature range to 175°C accommodates high-temperature environments. Moisture-resistant construction enhances reliability in humid or corrosive environments. Slightly reduced physical dimensions may benefit space-constrained layouts.

CMF504K6400FHEB Selection Criteria: This substitute maintains electrical and thermal equivalence to the original RNF14FTC4K64 while providing enhanced moisture resistance and extended operating temperature capability. Recommended for direct replacement in existing designs where the 0.25W power rating is specified. Smaller physical dimensions offer layout flexibility. Cut tape packaging format requires consideration in automated assembly workflows.

Both substitute parts maintain full compliance with ROHS3 and REACH requirements, ensuring regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can CMF554K6400FHEB be used as a direct replacement for RNF14FTC4K64? A: Yes. The higher power rating (0.5W vs 0.25W) is a non-limiting upgrade. All electrical parameters—resistance, tolerance, temperature coefficient, and composition—are identical. Physical dimensions are comparable within axial package tolerances.

Q: What is the difference between CMF554K6400FHEB and CMF504K6400FHEB? A: The primary difference is power rating: CMF554K6400FHEB is rated 0.5W while CMF504K6400FHEB is rated 0.25W. Both offer identical resistance, tolerance, and temperature coefficient. CMF504K6400FHEB has smaller physical dimensions. Both provide moisture-resistant construction and extended operating temperature to 175°C.

Q: Are there packaging format considerations when substituting? A: Yes. The original RNF14FTC4K64 is supplied in Tape & Reel (TR) format. Both substitute parts are supplied in Cut Tape (CT) format. Verify compatibility with your assembly equipment and procurement workflow before selection.

Q: Do the substitute parts meet the same compliance standards? A: Yes. All three parts are ROHS3 compliant and REACH unaffected, maintaining regulatory equivalence.

Q: Can CMF504K6400FHEB be used in applications requiring higher temperature operation? A: Yes. CMF504K6400FHEB operates to 175°C, compared to the original specification of 155°C, providing extended thermal capability for high-temperature circuit environments.

Q: Are there mechanical fit considerations due to dimensional differences? A: Physical dimensions vary slightly between parts. CMF504K6400FHEB is notably smaller (0.065" Dia x 0.150" L vs 0.093" Dia x 0.250" L). Verify PCB layout and component spacing before substitution to ensure mechanical compatibility.