RNF14FTC3K57 Equivalent & Substitute Parts

Part Overview

The RNF14FTC3K57 is a 4.67 kOhms ±1% 0.25W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety characteristics, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently active in production with 933 units in stock. Substitute parts are identified to address inventory availability, extended operating temperature ranges, or alternative packaging configurations while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF14FTC3K57

Stackpole Electronics IncIn Stock: 973RNF14FTC3K57 Datasheet

Current PartRFQ

CMF553K5700FHEB

Vishay DaleIn Stock: 2049CMF553K5700FHEB Datasheet

UpgradeRFQ

CMF503K5700FHEB

Vishay DaleIn Stock: 2110CMF503K5700FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC3K57 are qualified based on the following electrical and mechanical parameters:

Critical Parameters (Must Match):

• Resistance value: 4.67 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Temperature Coefficient: ±50ppm/°C
• Package Type: Axial
• RoHS Compliance: ROHS3 Compliant

Allowable Variations:

• Power rating may be equal or higher (0.25W or greater)
• Operating temperature range may be extended (minimum -55°C, maximum ≥155°C)
• Physical dimensions may vary within axial package constraints
• Packaging format may differ (Tape & Reel vs. Cut Tape)
• Manufacturer may differ provided all electrical specifications align

Two substitute parts meet these criteria: CMF503K5700FHEB (manufacturer-recommended direct equivalent) and CMF553K5700FHEB (upgraded power rating variant).

Parameter Comparison

Engineering Selection Recommendations

CMF503K5700FHEB (Manufacturer-Recommended Equivalent): This part is the primary substitute for the RNF14FTC3K57. It maintains identical electrical specifications (4.67 kOhms, ±1%, 0.25W, ±50ppm/°C) while offering an extended operating temperature range to 175°C and additional moisture resistance. The CMF503K5700FHEB is manufactured by Vishay Dale, an established supplier with ROHS3 compliance and active product status. Physical dimensions are smaller, which may require PCB layout verification. This part is suitable for direct replacement in applications where the extended temperature range provides operational benefit.

CMF553K5700FHEB (Upgraded Power Rating Variant): This substitute provides the same electrical specifications as the RNF14FTC3K57 with a doubled power rating (0.5W vs. 0.25W) and extended operating temperature range to 175°C. The CMF553K5700FHEB is appropriate for applications requiring higher power dissipation capability or thermal margin. Physical dimensions are comparable to the original part. This part is suitable for replacement in designs where increased power handling is beneficial or required.

Both substitute parts are ROHS3 compliant, active in production, and manufactured by Vishay Dale with established supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can CMF503K5700FHEB be used as a direct drop-in replacement for RNF14FTC3K57?

A: CMF503K5700FHEB is electrically equivalent with identical resistance, tolerance, power rating, and temperature coefficient. However, physical dimensions differ (0.065" Dia x 0.150" L vs. 0.093" Dia x 0.250" L). PCB layout and mechanical clearance must be verified before implementation.

Q: What is the advantage of CMF553K5700FHEB over CMF503K5700FHEB?

A: CMF553K5700FHEB provides double the power rating (0.5W vs. 0.25W) while maintaining all other electrical specifications. This allows greater power dissipation and thermal margin in the same resistance and tolerance class. Physical dimensions are also slightly larger, which may better match the original RNF14FTC3K57 footprint.

Q: Are the substitute parts compatible with the original packaging requirements?

A: The RNF14FTC3K57 is supplied in Tape & Reel (TR) format. Both substitute parts are supplied in Cut Tape (CT) format. Packaging format compatibility must be confirmed with procurement and assembly processes.

Q: Do the substitute parts maintain the same temperature coefficient?

A: Yes. Both CMF503K5700FHEB and CMF553K5700FHEB maintain the ±50ppm/°C temperature coefficient specified for the RNF14FTC3K57.

Q: What is the operating temperature advantage of the substitute parts?

A: The RNF14FTC3K57 operates from -55°C to 155°C. Both substitute parts extend the upper limit to 175°C, providing an additional 20°C of thermal headroom for high-temperature applications.

Q: Are all parts RoHS compliant?

A: Yes. The RNF14FTC3K57, CMF503K5700FHEB, and CMF553K5700FHEB are all ROHS3 compliant.