RNF14FTC124R Equivalent & Substitute Parts

Part Overview

The RNF14FTC124R is a 124 Ohm ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is designed for general-purpose electronic applications requiring precision resistance with flame retardant coating and safety features. The part maintains Active product status with ROHS3 compliance and is suitable for operating environments ranging from -55°C to 155°C. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits component interchange.

Substiute Parts

RNF14FTC124R

Stackpole Electronics IncIn Stock: 972RNF14FTC124R Datasheet

Current PartRFQ

CMF50124R00FHEB

Vishay DaleIn Stock: 2521CMF50124R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC124R is determined by the following critical parameters:

• Resistance value: 124 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Compliance: ROHS3 Compliant (minimum requirement)

The CMF50124R00FHEB from Vishay Dale meets all critical electrical and mechanical parameters. Both parts share identical resistance, tolerance, power rating, composition, and temperature coefficient specifications. Both are ROHS3 compliant and feature flame retardant coating with safety characteristics. The substitute part extends the operating temperature range to 175°C and includes moisture-resistant properties, providing enhanced environmental performance while maintaining full electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC124R and CMF50124R00FHEB are Active status components with ROHS3 compliance and REACH Unaffected designation. Selection between these parts should be based on:

Electrical compatibility is assured, as both components share identical resistance, tolerance, power rating, temperature coefficient, and composition specifications. The CMF50124R00FHEB provides an extended operating temperature range to 175°C and includes moisture-resistant properties, making it suitable for applications requiring enhanced environmental performance within the same electrical envelope.

Packaging considerations differ: the RNF14FTC124R is supplied in Tape & Reel format, while the CMF50124R00FHEB is supplied in Cut Tape format. Physical dimensions vary slightly between manufacturers, with the Vishay Dale part featuring a smaller profile (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L). These dimensional differences may impact PCB layout and mechanical fit in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the CMF50124R00FHEB directly replace the RNF14FTC124R in all applications?

A: Yes, from an electrical standpoint. Both components share identical resistance (124 Ohms), tolerance (±1%), power rating (0.25W), temperature coefficient (±50ppm/°C), and composition (metal film). Physical dimensions differ slightly, so PCB layout verification is necessary for space-constrained designs.

Q: What is the significance of the extended temperature range in the CMF50124R00FHEB?

A: The CMF50124R00FHEB operates to 175°C versus 155°C for the RNF14FTC124R. This extended range provides design margin for applications operating at elevated temperatures. If your application operates within -55°C to 155°C, both parts are functionally equivalent.

Q: Are there packaging format implications for component procurement?

A: Yes. The RNF14FTC124R is supplied in Tape & Reel (TR) format, while the CMF50124R00FHEB is supplied in Cut Tape (CT) format. Tape & Reel is typically used for automated assembly, while Cut Tape is suitable for manual or lower-volume applications. Verify your procurement and assembly process requirements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RNF14FTC124R and CMF50124R00FHEB are ROHS3 compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Both carry the same HTSUS code (8533.21.0090).

Q: What is the practical difference between the physical dimensions of these two parts?

A: The RNF14FTC124R measures 0.093" Dia x 0.250" L (2.35mm x 6.35mm), while the CMF50124R00FHEB measures 0.065" Dia x 0.150" L (1.65mm x 3.81mm). The Vishay Dale part is more compact. Verify PCB footprint and lead spacing compatibility before substitution in existing designs.

Q: Is moisture resistance a critical factor for my application?

A: The CMF50124R00FHEB includes moisture-resistant properties, while the RNF14FTC124R does not specify this feature. If your application involves high humidity or condensing environments, the moisture-resistant variant provides additional protection. Both parts are suitable for standard industrial environments.