RNF14FTC511R Equivalent & Substitute Parts

Part Overview

The RNF14FTC511R is a 511 Ohm ±1% 1/4W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values in compact form factors. The part is currently active in production with 777 pieces available in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

RNF14FTC511R

Stackpole Electronics IncIn Stock: 811RNF14FTC511R Datasheet

Current PartRFQ

CMF55511R00FHEB

Vishay DaleIn Stock: 4814CMF55511R00FHEB Datasheet

UpgradeRFQ

CMF50511R00FHEB

Vishay DaleIn Stock: 1843CMF50511R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC511R are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

• Resistance value: 511 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Package Type: Axial (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Allowable Variations:

• Power rating: May be equal or higher than 0.25W
• Operating temperature range: May be equal or wider than -55°C to 155°C
• Physical dimensions: May vary within axial package constraints
• Packaging format: Cut Tape (CT) acceptable as alternative to Tape & Reel (TR)
• Manufacturer: Different manufacturer acceptable if all electrical and mechanical parameters match

Two substitute parts meet these criteria: CMF55511R00FHEB (0.5W upgrade) and CMF50511R00FHEB (1/4W direct equivalent).

Parameter Comparison

Engineering Selection Recommendations

CMF50511R00FHEB Selection: This part provides direct electrical and mechanical equivalence to the RNF14FTC511R. Both components share identical resistance, tolerance, power rating, and temperature coefficient specifications. The CMF50511R00FHEB offers extended operating temperature range (-55°C to 175°C versus -55°C to 155°C) and includes moisture-resistant construction. Physical dimensions are smaller, which may provide layout advantages in space-constrained applications. Both parts maintain ROHS3 compliance and REACH unaffected status. This part is manufacturer-recommended for direct substitution.

CMF55511R00FHEB Selection: This part qualifies as a substitute through power rating upgrade (0.5W versus 0.25W) while maintaining all other electrical parameters. The higher power rating provides thermal margin in applications where the original 0.25W specification may approach operational limits. Physical dimensions are comparable to the main part. Extended operating temperature range and moisture-resistant features are included. ROHS3 compliance and REACH unaffected status are maintained. This part is suitable for applications where increased power dissipation capability is beneficial.

Frequently Asked Questions (FAQ)

Q: Can CMF50511R00FHEB be used as a direct drop-in replacement for RNF14FTC511R?

A: Yes. Both parts share identical electrical specifications: 511 Ohms ±1%, 0.25W power rating, ±50ppm/°C temperature coefficient, and metal film composition. Physical dimensions differ slightly, but both are axial package format suitable for standard through-hole PCB layouts. The CMF50511R00FHEB provides extended operating temperature range and moisture resistance as additional benefits.

Q: What is the difference between CMF55511R00FHEB and CMF50511R00FHEB?

A: The primary difference is power rating. CMF55511R00FHEB is rated at 0.5W (1/2W), while CMF50511R00FHEB is rated at 0.25W (1/4W), matching the original RNF14FTC511R specification. All other electrical parameters are identical. Physical dimensions also differ: CMF55511R00FHEB is larger (0.090" Dia x 0.240" L) compared to CMF50511R00FHEB (0.065" Dia x 0.150" L).

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts—RNF14FTC511R, CMF55511R00FHEB, and CMF50511R00FHEB—are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 for all parts, and HTSUS code is 8533.21.0090 for all parts.

Q: Can CMF55511R00FHEB be used in place of RNF14FTC511R in all applications?

A: CMF55511R00FHEB is electrically compatible with RNF14FTC511R for all applications where the original 0.25W power rating is specified. The higher 0.5W rating does not create incompatibility; it provides additional thermal margin. Physical size difference (larger diameter and length) must be verified against PCB layout constraints and mechanical clearance requirements.

Q: What packaging format differences exist between these parts?

A: RNF14FTC511R is supplied in Tape & Reel (TR) format. Both CMF55511R00FHEB and CMF50511R00FHEB are supplied in Cut Tape (CT) format. This difference affects handling and assembly processes but does not impact electrical or mechanical compatibility.

Q: Do the substitute parts offer any performance advantages?

A: Both Vishay Dale substitute parts include moisture-resistant construction, which is not specified for the Stackpole RNF14FTC511R. Both also provide extended operating temperature range (up to 175°C versus 155°C). These features represent functional enhancements without changing core electrical specifications.