RNF14FTC5K49 Equivalent & Substitute Parts

Part Overview

The RNF14FTC5K49 is a 5.49 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 tight tolerance specifications. The part is currently in active production status with 711 units in stock inventory.

Substitute parts are identified when equivalent electrical performance can be maintained while accommodating design flexibility, inventory availability, or specific application requirements within the allowed parameter ranges for this resistor category.

Substiute Parts

RNF14FTC5K49

Stackpole Electronics IncIn Stock: 759RNF14FTC5K49 Datasheet

Current PartRFQ

CMF555K4900FHEB

Vishay DaleIn Stock: 3246CMF555K4900FHEB Datasheet

UpgradeRFQ

CMF505K4900FHEB

Vishay DaleIn Stock: 1430CMF505K4900FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC5K49 are qualified based on the following criteria:

Electrical Equivalence Requirements:

• Identical resistance value: 5.49 kOhms
• Matching tolerance: ±1%
• Equivalent temperature coefficient: ±50ppm/°C
• Metal film composition maintained

Mechanical & Package Compatibility:

• Axial through-hole package format
• Two terminations (standard axial configuration)

Compliance & Environmental:

• ROHS3 compliance maintained
• Operating temperature range support for -55°C minimum
• Flame retardant and safety features preserved

Allowable Variations:

• Power rating may be equal or higher (0.25W or greater)
• Operating temperature maximum may exceed 155°C
• Physical dimensions may vary within axial package standards
• Packaging format (Tape & Reel vs. Cut Tape) does not affect electrical substitution

Parameter Comparison

Engineering Selection Recommendations

CMF505K4900FHEB (MFR Recommended): This substitute maintains identical electrical specifications and power rating to the RNF14FTC5K49. The CMF505K4900FHEB provides direct functional equivalence with extended operating temperature range (-55°C ~ 175°C) and enhanced moisture resistance. Both components are ROHS3 compliant and feature flame retardant construction. Physical dimensions are reduced (0.065" Dia x 0.150" L vs. 0.093" Dia x 0.250" L), which may provide space optimization benefits in compact layouts. This part is suitable for direct replacement in applications where the original specification is maintained.

CMF555K4900FHEB (Upgrade Option): This substitute provides increased power dissipation capability at 0.5W (1/2W) compared to the original 0.25W rating. The CMF555K4900FHEB maintains all electrical parameters and extends the operating temperature maximum to 175°C. This option is applicable in designs where thermal margin or higher power handling is beneficial, though the increased physical size (0.090" Dia x 0.240" L) must be verified against board layout constraints. ROHS3 compliance and moisture resistance are maintained.

Both substitute parts are active production components with established inventory availability and full compliance certification.

Frequently Asked Questions (FAQ)

Q: Can CMF505K4900FHEB be used as a direct drop-in replacement for RNF14FTC5K49?

A: Yes. The CMF505K4900FHEB maintains identical resistance (5.49 kOhms), tolerance (±1%), power rating (0.25W), and temperature coefficient (±50ppm/°C). The reduced physical dimensions (0.065" Dia x 0.150" L) require verification that the component fits within the PCB footprint and lead spacing of the original design.

Q: What is the difference between the two substitute options?

A: The CMF555K4900FHEB provides higher power dissipation (0.5W vs. 0.25W) with slightly larger dimensions. The CMF505K4900FHEB matches the original power rating with reduced size. Both maintain identical resistance values and tolerance specifications. Selection depends on thermal requirements and available board space.

Q: Are the substitute parts compatible with the original operating temperature range?

A: Yes. Both substitute parts support the minimum operating temperature of -55°C specified for the RNF14FTC5K49. Both extend the maximum operating temperature to 175°C, providing additional thermal margin beyond the original 155°C specification.

Q: Does packaging format (Tape & Reel vs. Cut Tape) affect electrical performance?

A: No. Packaging format is a logistics and handling specification only. Tape & Reel (TR) and Cut Tape (CT) formats contain identical components and do not affect electrical characteristics or substitution compatibility.

Q: Are moisture resistance features important for substitution?

A: The substitute parts (CMF series) include moisture resistant construction as an additional feature not specified in the original RNF14FTC5K49. This enhancement does not prevent substitution and provides additional environmental protection in applications exposed to humidity or moisture conditions.

Q: What compliance certifications apply to all parts in this substitution group?

A: All three components (RNF14FTC5K49, CMF555K4900FHEB, and CMF505K4900FHEB) are ROHS3 compliant and REACH unaffected. All carry EAR99 export classification and 8533.21.0090 HTSUS code.