RNF14FTC133R Equivalent & Substitute Parts

Part Overview

The RNF14FTC133R is a 133 Ohms ±1% 0.25W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for general-purpose applications requiring precision resistance values. The part maintains Active product status with 879 units in current inventory. Substitute parts are identified to address supply availability, packaging preferences, or enhanced performance characteristics while maintaining electrical compatibility.

Substiute Parts

RNF14FTC133R

Stackpole Electronics IncIn Stock: 889RNF14FTC133R Datasheet

Current PartRFQ

CMF55133R00FHEB

Vishay DaleIn Stock: 2457CMF55133R00FHEB Datasheet

UpgradeRFQ

CMF50133R00FHEB

Vishay DaleIn Stock: 1476CMF50133R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 133 Ohms
• Tolerance: ±1%
• Composition: Metal Film
• Temperature Coefficient: ±50ppm/°C

Mechanical Parameters (Must Be Compatible):

• Package Type: Axial through-hole
• Number of Terminations: 2

Allowable Variations:

• Power rating may be equal or higher (0.25W or greater)
• Operating temperature range may be equal or extended
• Physical dimensions may vary within axial package constraints
• Packaging format (Tape & Reel vs. Cut Tape) does not affect electrical compatibility

The CMF50133R00FHEB and CMF55133R00FHEB from Vishay Dale meet all substitution criteria as manufacturer-recommended alternatives.

Parameter Comparison

Engineering Selection Recommendations

CMF50133R00FHEB (Manufacturer Recommended): This substitute provides direct electrical and mechanical equivalence to the RNF14FTC133R. Both parts share identical resistance, tolerance, power rating, and temperature coefficient specifications. The CMF50 maintains ROHS3 compliance and REACH Unaffected status. Physical dimensions are smaller, which may provide layout advantages in space-constrained applications. Extended operating temperature range (-55°C ~ 175°C) provides additional thermal margin. This part is designated as the manufacturer-recommended substitute.

CMF55133R00FHEB (Upgrade Option): This substitute offers increased power dissipation capability (0.5W vs. 0.25W) while maintaining all other electrical parameters. The higher power rating provides design margin for applications subject to thermal stress or transient conditions. Extended operating temperature range and moisture-resistant features enhance reliability in demanding environments. This option is suitable when enhanced performance characteristics are beneficial and space constraints are not limiting.

Frequently Asked Questions (FAQ)

Q: Can CMF50133R00FHEB be used as a direct replacement for RNF14FTC133R? A: Yes. Both parts share identical electrical specifications: 133 Ohms ±1%, 0.25W power rating, ±50ppm/°C temperature coefficient, and metal film composition. Axial package compatibility is maintained. Physical dimensions differ slightly, but both conform to standard axial through-hole footprints.

Q: What is the difference between CMF50133R00FHEB and CMF55133R00FHEB? A: The primary difference is power rating: CMF50 is rated 0.25W (matching the original part), while CMF55 is rated 0.5W. Both maintain identical resistance, tolerance, and temperature coefficient. The CMF55 provides additional thermal headroom for applications with higher power dissipation requirements.

Q: Are there packaging format differences between these parts? A: Yes. The RNF14FTC133R is supplied in Tape & Reel (TR) format, while both Vishay Dale substitutes are supplied in Cut Tape (CT) format. This affects handling and assembly processes but does not impact electrical performance or compatibility.

Q: Do all parts meet RoHS and REACH compliance requirements? A: Yes. RNF14FTC133R, CMF50133R00FHEB, and CMF55133R00FHEB are all ROHS3 Compliant and REACH Unaffected.

Q: Which substitute should be selected for thermal margin applications? A: CMF55133R00FHEB is recommended for applications requiring additional thermal margin due to its 0.5W power rating and extended operating temperature range (-55°C ~ 175°C).

Q: Are physical dimension differences significant for PCB layout? A: CMF50133R00FHEB has smaller dimensions (0.065" Dia x 0.150" L) compared to RNF14FTC133R (0.093" Dia x 0.250" L), potentially offering layout advantages. CMF55133R00FHEB dimensions (0.090" Dia x 0.240" L) are intermediate. All three maintain standard axial through-hole compatibility.