RNF14FTC243R Equivalent & Substitute Parts

Part Overview

The RNF14FTC243R is a 243 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 applications requiring precision resistance values with tight tolerance specifications. The part is currently active in production with 790 pieces in stock. Substitute parts are identified to address inventory availability, extended operating temperature ranges, or alternative packaging requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF14FTC243R

Stackpole Electronics IncIn Stock: 883RNF14FTC243R Datasheet

Current PartRFQ

CMF55243R00FHEB

Vishay DaleIn Stock: 7046CMF55243R00FHEB Datasheet

UpgradeRFQ

CMF50243R00FHEB

Vishay DaleIn Stock: 2416CMF50243R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC243R are qualified based on the following electrical and mechanical parameters:

Critical Parameters (Must Match):

• Resistance value: 243 Ohms
• Tolerance: ±1%
• Composition: Metal Film
• Temperature Coefficient: ±50ppm/°C
• Package Type: Axial
• RoHS Compliance: ROHS3 Compliant

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 (TR) or Cut Tape (CT) are interchangeable for component selection
• Features: Additional features (moisture resistance) are acceptable enhancements

The identified substitutes CMF55243R00FHEB and CMF50243R00FHEB meet all critical parameters while offering enhanced specifications or alternative availability.

Parameter Comparison

Engineering Selection Recommendations

CMF50243R00FHEB (MFR Recommended): This part is the direct electrical equivalent with identical power rating (0.25W) and resistance specifications. It provides extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and enhanced moisture resistance. Physical dimensions are smaller, which may be advantageous in space-constrained layouts. Both parts are ROHS3 compliant and active in production. This substitute is recommended for applications requiring the same power dissipation with improved environmental performance.

CMF55243R00FHEB (Upgrade): This part offers doubled power rating (0.5W versus 0.25W) while maintaining all other electrical specifications. Extended operating temperature range and moisture resistance are included. The higher power rating provides additional thermal margin in applications with variable load conditions. Physical dimensions are comparable to the main part. This substitute is suitable for designs where increased power dissipation capability is beneficial without circuit modification.

Both substitutes maintain ROHS3 compliance, REACH unaffected status, and identical resistance tolerance and temperature coefficient specifications.

Frequently Asked Questions (FAQ)

Q: Can CMF50243R00FHEB be used as a direct replacement for RNF14FTC243R?

A: Yes. Both parts share identical resistance (243 Ohms), tolerance (±1%), power rating (0.25W), composition (metal film), and temperature coefficient (±50ppm/°C). The CMF50243R00FHEB provides extended operating temperature range (-55°C ~ 175°C) and moisture resistance as enhancements. Physical dimensions differ slightly but remain within axial package constraints.

Q: What is the difference between CMF55243R00FHEB and CMF50243R00FHEB?

A: The primary difference is power rating: CMF55243R00FHEB is rated at 0.5W (1/2W) while CMF50243R00FHEB is rated at 0.25W (1/4W). Both maintain identical resistance, tolerance, and temperature coefficient. Physical dimensions also differ, with CMF50243R00FHEB being smaller. Both offer extended temperature range and moisture resistance compared to the main part.

Q: Are packaging format differences (Tape & Reel vs. Cut Tape) significant for component selection?

A: Packaging format differences do not affect electrical or mechanical compatibility. Tape & Reel (TR) and Cut Tape (CT) are alternative supply formats for the same component. Selection depends on assembly process requirements and inventory management practices rather than functional performance.

Q: Can the higher power-rated CMF55243R00FHEB be used in place of the 0.25W RNF14FTC243R?

A: Yes. The CMF55243R00FHEB (0.5W) is electrically compatible with circuits designed for the RNF14FTC243R (0.25W). Higher power rating provides additional thermal margin and does not negatively impact circuit performance. Physical dimensions are comparable and remain within axial package constraints.

Q: What compliance certifications apply to all three parts?

A: All three parts are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 for all parts. HTSUS code is 8533.21.0090 for all parts.