RNF14FTC4K02 Equivalent & Substitute Parts

Part Overview

The RNF14FTC4K02 is a 4.02 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 construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part is currently active in production with 957 units in stock. Substitute parts are identified to provide design flexibility, inventory alternatives, and enhanced performance options while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF14FTC4K02

Stackpole Electronics IncIn Stock: 1035RNF14FTC4K02 Datasheet

Current PartRFQ

CMF554K0200FHEB

Vishay DaleIn Stock: 2545CMF554K0200FHEB Datasheet

UpgradeRFQ

CMF504K0200FHEB

Vishay DaleIn Stock: 1964CMF504K0200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC4K02 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Identical resistance value: 4.02 kOhms
• Identical tolerance: ±1%
• Identical composition: Metal Film
• Identical package type: Axial through-hole
• Identical temperature coefficient: ±50ppm/°C
• Compatible RoHS compliance: ROHS3 Compliant

Substitution Categories:

Direct Equivalent (CMF504K0200FHEB): Manufacturer-recommended substitute with identical electrical specifications and power rating (0.25W). Provides drop-in replacement capability with enhanced moisture resistance and extended operating temperature range (-55°C ~ 175°C).

Upgrade Option (CMF554K0200FHEB): Higher power rating variant (0.5W vs. 0.25W) with identical electrical parameters. Suitable for applications requiring increased thermal margin or higher dissipation capability while maintaining all other specifications.

Parameter Comparison

Engineering Selection Recommendations

CMF504K0200FHEB Selection: This part is the manufacturer-recommended direct equivalent. It maintains identical electrical and power specifications while offering enhanced moisture resistance and an extended operating temperature range to 175°C. This substitute is suitable for direct replacement in existing designs without circuit modification. Both parts are ROHS3 compliant and carry equivalent safety certifications.

CMF554K0200FHEB Selection: This upgrade option doubles the power rating to 0.5W while preserving all electrical parameters. Selection of this variant is appropriate when circuit analysis indicates potential thermal stress at the original 0.25W rating, or when design margins require increased dissipation capability. The extended temperature range and moisture resistance provide additional environmental protection. All compliance certifications remain equivalent to the main part.

Inventory Considerations: Both substitute parts maintain higher stock levels (1919 and 2445 units respectively) compared to the main part (957 units), providing improved supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can CMF504K0200FHEB be used as a direct replacement for RNF14FTC4K02?

A: Yes. The CMF504K0200FHEB is the manufacturer-recommended equivalent with identical resistance (4.02 kOhms), tolerance (±1%), power rating (0.25W), and temperature coefficient (±50ppm/°C). Both are metal film axial components with ROHS3 compliance. No circuit modifications are required.

Q: What is the difference between CMF504K0200FHEB and CMF554K0200FHEB?

A: The primary difference is power rating. CMF504K0200FHEB is rated at 0.25W (1/4W), matching the original part. CMF554K0200FHEB is rated at 0.5W (1/2W). All other electrical parameters—resistance, tolerance, and temperature coefficient—are identical. The higher power rating provides increased thermal margin in applications with higher dissipation requirements.

Q: Are there physical size differences between these parts?

A: Yes. RNF14FTC4K02 measures 0.093" Dia x 0.250" L (2.35mm x 6.35mm). CMF504K0200FHEB measures 0.065" Dia x 0.150" L (1.65mm x 3.81mm), making it physically smaller. CMF554K0200FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Physical size differences may affect PCB layout and mechanical fit; verify board space availability before substitution.

Q: Do all three parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. They share identical HTSUS classification (8533.21.0090).

Q: What is the difference in packaging format?

A: RNF14FTC4K02 is supplied in Tape & Reel (TR) format. Both substitute parts (CMF504K0200FHEB and CMF554K0200FHEB) are supplied in Cut Tape (CT) format. This affects handling and automated assembly processes; verify compatibility with your procurement and assembly workflow.

Q: Can CMF554K0200FHEB be used in place of RNF14FTC4K02 in all applications?

A: CMF554K0200FHEB maintains all electrical specifications and is physically compatible. The higher power rating (0.5W vs. 0.25W) provides additional thermal capability without affecting circuit performance. However, verify that the physical size difference (larger diameter and length) does not create PCB layout constraints in your specific application.