RNF14FTD280K Equivalent & Substitute Parts

Part Overview

The RNF14FTD280K is a 280 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component is designed for general-purpose applications requiring precision resistance values with flame retardant coating and safety features. The part maintains Active product status with 988 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit higher power ratings or improved performance characteristics.

Substiute Parts

RNF14FTD280K

Stackpole Electronics IncIn Stock: 1029RNF14FTD280K Datasheet

Current PartRFQ

CMF55280K00FHEB

Vishay DaleIn Stock: 2144CMF55280K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CMF55280K00FHEB from Vishay Dale qualifies as a substitute based on the following matching parameters:

• Identical resistance value: 280 kOhms
• Identical tolerance: ±1%
• Identical composition: Metal Film
• Identical package type: Axial
• Identical number of terminations: 2
• Identical RoHS3 compliance status
• Identical REACH Unaffected status
• Identical ECCN and HTSUS classifications

The substitute part exceeds the main part in power rating (0.5W vs 0.25W), operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C), and temperature coefficient stability (±50ppm/°C vs ±100ppm/°C). These enhancements do not create incompatibility; they represent performance improvements suitable for applications where the main part is unavailable.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTD280K and CMF55280K00FHEB maintain Active product status and full ROHS3 compliance, confirming suitability for current production environments. The CMF55280K00FHEB is selected as a substitute when the primary part is unavailable. The substitute's higher power rating (0.5W) and extended operating temperature range (-55°C ~ 175°C) provide operational margin in applications where thermal stress or power dissipation may approach component limits. The improved temperature coefficient (±50ppm/°C) offers enhanced stability for precision circuits. Both parts are metal film axial resistors with identical electrical specifications for resistance and tolerance, ensuring direct functional equivalence in circuit applications. Packaging format differs (Tape & Reel vs Cut Tape), requiring consideration of procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CMF55280K00FHEB replace RNF14FTD280K in all applications?

A: Yes, for applications where the circuit design permits a 0.5W rated component. The substitute meets or exceeds all critical electrical parameters: identical 280 kOhms resistance, ±1% tolerance, and metal film composition. Both are axial through-hole components with two terminations.

Q: What is the significance of the higher power rating in the substitute?

A: The CMF55280K00FHEB is rated at 0.5W compared to the main part's 0.25W. This higher rating provides additional thermal margin and allows operation in circuits with higher power dissipation without exceeding component stress limits.

Q: How do the temperature coefficients differ?

A: The main part RNF14FTD280K has a temperature coefficient of ±100ppm/°C, while the substitute CMF55280K00FHEB has ±50ppm/°C. The lower coefficient in the substitute indicates superior resistance stability across temperature variations, beneficial for precision applications.

Q: Are there packaging considerations when switching to the substitute?

A: Yes. The RNF14FTD280K is supplied in Tape & Reel (TR) format, while CMF55280K00FHEB is supplied in Cut Tape (CT) format. Assembly and procurement workflows may require adjustment based on your production equipment and inventory management systems.

Q: Do both parts meet current compliance requirements?

A: Both parts are ROHS3 compliant and REACH Unaffected, confirming compliance with current environmental and regulatory standards for electronic component manufacturing and distribution.

Q: What is the physical size difference between these parts?

A: The main part measures 0.093" diameter × 0.250" length (2.35mm × 6.35mm). The substitute measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). Both are axial components with minimal dimensional variation suitable for standard PCB layouts.