RNF14FTC383R Equivalent & Substitute Parts

Part Overview

The RNF14FTC383R is a 383 Ohms ±1% 0.25W (1/4W) through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for general-purpose electronic applications requiring precision resistance values. The part is currently active in production with ROHS3 compliance and maintains 1006 units in stock inventory.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

RNF14FTC383R

Stackpole Electronics IncIn Stock: 1066RNF14FTC383R Datasheet

Current PartRFQ

CMF55383R00FHEB

Vishay DaleIn Stock: 2608CMF55383R00FHEB Datasheet

UpgradeRFQ

CMF50383R00FHEB

Vishay DaleIn Stock: 1955CMF50383R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC383R is determined by the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 383 Ohms
• Tolerance: ±1%
• Composition: Metal Film
• Temperature Coefficient: ±50ppm/°C

Mechanical Parameters (Must Match):

• Package type: Axial through-hole
• Number of terminations: 2

Allowable Variations:

• Power rating: Equal or greater than 0.25W
• Operating temperature range: Equal or greater than -55°C ~ 155°C
• Physical dimensions: Variations permitted within axial package constraints
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) acceptable

Compliance Requirements:

• RoHS3 Compliant
• REACH Unaffected status

Two substitute parts meet these criteria: CMF50383R00FHEB (manufacturer-recommended direct equivalent) and CMF55383R00FHEB (upgraded power rating variant).

Parameter Comparison

Engineering Selection Recommendations

CMF50383R00FHEB (Manufacturer-Recommended Substitute): This part is the direct equivalent to RNF14FTC383R with identical electrical specifications and power rating. Both are 0.25W metal film resistors with ±1% tolerance and ±50ppm/°C temperature coefficient. The CMF50 series extends the operating temperature range to -55°C ~ 175°C, providing enhanced thermal performance. This part maintains ROHS3 compliance and REACH unaffected status. The smaller physical dimensions (0.065" Dia x 0.150" L) may require PCB layout verification for existing designs. Inventory availability is 1917 units.

CMF55383R00FHEB (Upgraded Power Rating Variant): This part provides the same 383 Ohms ±1% resistance and temperature coefficient as the main part, but with doubled power rating (0.5W vs 0.25W). The CMF55 series is suitable for applications requiring higher power dissipation capability while maintaining identical electrical characteristics. Operating temperature range extends to -55°C ~ 175°C. Physical dimensions are 0.090" Dia x 0.240" L, slightly smaller than the original part. ROHS3 and REACH compliance are maintained. Inventory availability is 2592 units.

Both substitute parts are active products with full compliance certifications and adequate stock levels.

Frequently Asked Questions (FAQ)

Q: Can CMF50383R00FHEB be used as a direct replacement for RNF14FTC383R? A: Yes. Both parts share identical electrical specifications: 383 Ohms ±1% resistance, 0.25W power rating, ±50ppm/°C temperature coefficient, and metal film composition. The CMF50 series provides an extended operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C). Physical dimensions differ slightly, requiring PCB layout verification.

Q: When should CMF55383R00FHEB be selected instead of CMF50383R00FHEB? A: Select the CMF55 variant when the application requires higher power dissipation capability. The 0.5W rating provides thermal margin in circuits where the original 0.25W rating approaches its limits. Electrical characteristics remain identical across both Vishay Dale substitutes.

Q: Are there packaging format differences between the main part and substitutes? A: Yes. RNF14FTC383R is supplied in Tape & Reel (TR) format. Both CMF50383R00FHEB and CMF55383R00FHEB are supplied in Cut Tape (CT) format. Verify that your assembly process accommodates the different packaging format.

Q: Do the physical dimension differences affect PCB compatibility? A: Physical dimensions vary across all three parts. RNF14FTC383R measures 0.093" Dia x 0.250" L, CMF50383R00FHEB measures 0.065" Dia x 0.150" L, and CMF55383R00FHEB measures 0.090" Dia x 0.240" L. Verify that existing PCB footprints and component placement accommodate the selected substitute's dimensions.

Q: Are all substitute parts RoHS3 compliant? A: Yes. RNF14FTC383R, CMF50383R00FHEB, and CMF55383R00FHEB are all ROHS3 compliant with REACH unaffected status.

Q: What is the temperature coefficient specification for all parts? A: All three parts maintain ±50ppm/°C temperature coefficient, ensuring consistent resistance stability across temperature variations.