RNF14FAD301R Equivalent & Substitute Parts

Part Overview

The RNF14FAD301R is a 301 Ohm ±1% 1/4W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety characteristics, designed for applications requiring precision resistance values in compact form factors. The part is currently active in production with ROHS3 compliance and is suitable for general-purpose electronic circuit applications where 301 Ohm resistance at 0.25W power dissipation is specified.

Equivalent and substitute parts are identified when electrical parameters (resistance value, tolerance, power rating, temperature coefficient, operating temperature range) and mechanical specifications (package type, termination style, dimensions) align within acceptable engineering tolerances for the application.

Substiute Parts

RNF14FAD301R

Stackpole Electronics IncIn Stock: 938RNF14FAD301R Datasheet

Current PartRFQ

RNF14FTD301R

Stackpole Electronics IncIn Stock: 61152RNF14FTD301R Datasheet

DirectRFQ

CMF55301R00FHEB

Vishay DaleIn Stock: 2020CMF55301R00FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FAD301R are classified based on the following substitution criteria:

Direct Equivalent (Same Electrical & Mechanical Specifications):

• Identical resistance value: 301 Ohms
• Identical tolerance: ±1%
• Identical power rating: 0.25W (1/4W)
• Identical package type: Axial
• Identical composition: Metal Film
• Identical operating temperature range: -55°C ~ 155°C
• Identical RoHS compliance: ROHS3 Compliant
• Packaging format difference only (Tape & Box vs. Cut Tape)

Upgrade Substitute (Enhanced Electrical Specifications):

• Identical resistance value: 301 Ohms
• Identical tolerance: ±1%
• Higher power rating: 0.5W (1/2W) — allows operation in higher power dissipation applications
• Identical package type: Axial
• Identical composition: Metal Film
• Extended operating temperature range: -55°C ~ 175°C — provides wider thermal operating window
• Improved temperature coefficient: ±50ppm/°C — provides better temperature stability
• Identical RoHS compliance: ROHS3 Compliant
• Slightly reduced dimensions: 0.090" Dia x 0.240" L (2.29mm x 6.10mm)

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD301R (Direct Equivalent): Use this substitute when the application requires identical electrical and mechanical specifications to the RNF14FAD301R. The only difference is packaging format (Cut Tape vs. Tape & Box). Both parts are manufactured by Stackpole Electronics Inc, maintain identical resistance, tolerance, power rating, and operating temperature range. This substitute is appropriate for direct replacement in production environments where packaging format does not impact assembly processes. Both parts maintain ROHS3 compliance and identical regulatory status.

CMF55301R00FHEB (Upgrade Substitute): Use this substitute when the application can benefit from enhanced electrical performance. The CMF55301R00FHEB provides higher power dissipation capability (0.5W vs. 0.25W), extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C), and superior temperature stability (±50ppm/°C vs. ±100ppm/°C). This upgrade is suitable for applications requiring thermal margin or improved long-term stability. The slightly reduced physical dimensions (0.090" Dia x 0.240" L) may provide space advantages in compact layouts. ROHS3 compliance is maintained. This substitute is appropriate when the application specification permits higher power rating and extended temperature range without design modification.

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD301R be used as a direct replacement for RNF14FAD301R? A: Yes. Both parts are manufactured by Stackpole Electronics Inc with identical electrical specifications (301 Ohms ±1%, 0.25W, ±100ppm/°C, -55°C ~ 155°C). The only difference is packaging format (Cut Tape vs. Tape & Box). Direct substitution is appropriate for applications where packaging format does not affect assembly or supply chain requirements.

Q: What are the advantages of using CMF55301R00FHEB instead of RNF14FAD301R? A: The CMF55301R00FHEB offers three key advantages: (1) Higher power rating (0.5W vs. 0.25W) allows operation in higher power dissipation circuits, (2) Extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C) provides thermal margin for high-temperature applications, and (3) Superior temperature coefficient (±50ppm/°C vs. ±100ppm/°C) ensures better resistance stability across temperature variations.

Q: Are all three parts ROHS3 compliant? A: Yes. RNF14FAD301R, RNF14FTD301R, and CMF55301R00FHEB are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Will CMF55301R00FHEB fit in the same PCB footprint as RNF14FAD301R? A: The CMF55301R00FHEB has slightly reduced dimensions (0.090" Dia x 0.240" L vs. 0.093" Dia x 0.250" L). Both are axial package types with identical termination style (2 terminations). The dimensional difference is minimal and should not impact PCB layout compatibility in most applications. Verify specific board layout constraints if space is critical.

Q: Can RNF14FAD301R be substituted with CMF55301R00FHEB in all applications? A: Substitution is appropriate when the application specification permits the enhanced electrical characteristics (higher power rating, extended temperature range, improved temperature coefficient). If the application is specifically designed for 0.25W power rating and 155°C maximum temperature, the upgrade substitute may exceed design requirements. Verify application specifications before substitution.

Q: What is the difference between Tape & Box (TB) and Cut Tape (CT) packaging? A: Tape & Box packaging includes resistors on tape wound in a box, suitable for manual handling and smaller volume orders. Cut Tape packaging provides resistors on tape in cut lengths, optimized for automated pick-and-place assembly equipment. Both formats contain identical components; packaging format selection depends on assembly process requirements.