RNF14FAD2K49 Equivalent & Substitute Parts

Part Overview

The RNF14FAD2K49 is a 2.49 kOhms ±1% 0.25W (1/4W) through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety characteristics, designed for general-purpose electronic applications requiring precision resistance values. The part is currently active in production and widely available in inventory. Substitute parts may be required due to packaging format availability, enhanced performance specifications, or supply chain optimization.

Substiute Parts

RNF14FAD2K49

Stackpole Electronics IncIn Stock: 1162RNF14FAD2K49 Datasheet

Current PartRFQ

RNF14FTD2K49

Stackpole Electronics IncIn Stock: 42758RNF14FTD2K49 Datasheet

DirectRFQ

CMF552K4900FHEB

Vishay DaleIn Stock: 1552CMF552K4900FHEB Datasheet

UpgradeRFQ

CMF552K4900FKEA

Vishay DaleIn Stock: 2001CMF552K4900FKEA Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FAD2K49 is determined by the following critical parameters:

Direct Substitutes maintain identical electrical specifications and axial package format. These parts are interchangeable without circuit redesign:

• Resistance value: 2.49 kOhms
• Tolerance: ±1%
• Power rating: 0.25W (1/4W)
• Package: Axial through-hole
• Composition: Metal Film

Upgrade Substitutes provide enhanced performance characteristics while maintaining the same resistance value, tolerance, and axial package format. These parts offer higher power ratings and improved temperature stability, suitable for applications requiring additional thermal margin or higher dissipation capacity:

• Resistance value: 2.49 kOhms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W) or higher
• Package: Axial through-hole
• Composition: Metal Film

All substitute parts must maintain ROHS3 compliance and axial package configuration for mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD2K49 (Direct Substitute): This Stackpole Electronics part is electrically and mechanically identical to the RNF14FAD2K49, differing only in packaging format (Cut Tape versus Tape & Box). Selection is appropriate when Cut Tape packaging meets assembly requirements. Both parts maintain identical electrical performance and ROHS3 compliance.

CMF552K4900FHEB (Upgrade Substitute): This Vishay Dale resistor provides doubled power rating (0.5W versus 0.25W) and superior temperature coefficient (±50ppm/°C versus ±100ppm/°C). The extended operating temperature range (-55°C ~ 175°C) and moisture-resistant features provide enhanced reliability. Selection is appropriate for applications requiring higher thermal margin or improved temperature stability. ROHS3 compliance is maintained.

CMF552K4900FKEA (Upgrade Substitute): This Vishay Dale resistor provides doubled power rating (0.5W versus 0.25W) with extended operating temperature range (-55°C ~ 175°C) and moisture-resistant features. Temperature coefficient remains ±100ppm/°C. Selection is appropriate for applications requiring higher power dissipation capacity. ROHS3 compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD2K49 be used as a direct replacement for RNF14FAD2K49?

A: Yes. Both parts are manufactured by Stackpole Electronics Inc with identical electrical specifications (2.49 kOhms ±1%, 0.25W, metal film, axial package). The only difference is packaging format (Cut Tape versus Tape & Box). Electrical performance and circuit compatibility are identical.

Q: What are the advantages of using CMF552K4900FHEB or CMF552K4900FKEA over the original part?

A: Both Vishay Dale alternatives provide doubled power rating (0.5W versus 0.25W), allowing higher current dissipation and thermal margin. CMF552K4900FHEB additionally offers superior temperature coefficient (±50ppm/°C). Both extend the operating temperature range to 175°C and include moisture-resistant features. These upgrades are beneficial for high-temperature or high-dissipation applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RNF14FTD2K49, CMF552K4900FHEB, and CMF552K4900FKEA are all ROHS3 compliant, matching the compliance status of the RNF14FAD2K49.

Q: Will the larger physical dimensions of the 1/2W resistors affect PCB layout?

A: The CMF552K4900FHEB and CMF552K4900FKEA have slightly smaller dimensions (0.090" Dia x 0.240" L) compared to the RNF14FAD2K49 (0.093" Dia x 0.250" L). Both maintain axial package configuration, and the dimensional difference is negligible for standard PCB layouts. Mechanical compatibility is maintained.

Q: Can I use a 0.5W resistor in a circuit designed for a 0.25W resistor?

A: Yes. A higher power-rated resistor can be used in applications designed for lower power ratings. The 0.5W alternatives will operate at lower stress levels in 0.25W applications, improving reliability and thermal performance. No circuit redesign is required.

Q: What is the difference between RNF14FTD2K49 and the CMF alternatives?

A: RNF14FTD2K49 is a direct electrical equivalent with identical power rating (0.25W). CMF552K4900FHEB and CMF552K4900FKEA are upgrade alternatives with doubled power rating (0.5W), extended temperature range, and moisture resistance. Selection depends on application requirements and thermal considerations.