RNF14FTC237R Equivalent & Substitute Parts

Part Overview

The RNF14FTC237R is a 237 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 applications requiring precision resistance values with tight tolerance specifications. The part maintains Active product status with 849 units in current inventory. Substitute parts are identified to address supply chain requirements, packaging preferences, or performance envelope adjustments while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

RNF14FTC237R

Stackpole Electronics IncIn Stock: 902RNF14FTC237R Datasheet

Current PartRFQ

CMF55237R00FHEB

Vishay DaleIn Stock: 844CMF55237R00FHEB Datasheet

UpgradeRFQ

CMF50237R00FHEB

Vishay DaleIn Stock: 9036CMF50237R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC237R are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Resistance value: 237 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)

Mechanical Compatibility Requirements:

• Package Type: Axial (exact match required)
• Number of Terminations: 2 (exact match required)

Regulatory Compliance Requirements:

• RoHS3 Compliant (minimum requirement)
• REACH Unaffected (minimum requirement)

Allowable Variations:

• Power Rating: May be equal or higher than 0.25W
• Operating Temperature Range: May be equal or extended
• Physical dimensions: May vary within axial package constraints
• Packaging format: Tape & Reel or Cut Tape acceptable
• Manufacturer: Different manufacturers permitted

The two identified substitutes meet all electrical and mechanical compatibility criteria while offering either equivalent or enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

CMF50237R00FHEB (MFR Recommended Substitute): This part is designated as manufacturer recommended and provides direct electrical equivalence to the RNF14FTC237R. It maintains identical power rating (0.25W), resistance (237 Ohms), and tolerance (±1%). The extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) provides additional thermal margin. Both parts are ROHS3 compliant and REACH unaffected. The CMF50237R00FHEB includes moisture resistant features and is available in significantly higher inventory (8981 units). Physical dimensions are smaller, which may provide layout advantages in space-constrained applications. Packaging is supplied in Cut Tape format rather than Tape & Reel.

CMF55237R00FHEB (Upgrade Substitute): This part offers enhanced power rating (0.5W versus 0.25W) while maintaining all other electrical specifications. The upgrade path is appropriate for applications where thermal margin or power dissipation headroom is beneficial. Operating temperature range is extended to -55°C ~ 175°C. Like the CMF50237R00FHEB, this part includes moisture resistant features and maintains ROHS3 compliance and REACH unaffected status. Physical dimensions are comparable to the main part. Inventory availability is adequate at 779 units.

Both substitute parts are Active status products with current manufacturing support and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can CMF50237R00FHEB be used as a direct replacement for RNF14FTC237R? A: Yes. Both parts share identical electrical specifications: 237 Ohms ±1% resistance, 0.25W power rating, metal film composition, and ±50ppm/°C temperature coefficient. Both are ROHS3 compliant and REACH unaffected. The primary differences are manufacturer (Vishay Dale versus Stackpole Electronics Inc), physical dimensions, and packaging format (Cut Tape versus Tape & Reel).

Q: What is the difference between CMF50237R00FHEB and CMF55237R00FHEB? A: The primary difference is power rating. CMF50237R00FHEB is rated at 0.25W (1/4W), matching the original part. CMF55237R00FHEB is rated at 0.5W (1/2W), providing double the power dissipation capability. All other electrical parameters are identical. Physical dimensions differ slightly due to the higher power rating.

Q: Are there any compatibility concerns with axial package dimensions? A: All three parts use axial through-hole packages with two terminations. Physical dimensions vary: RNF14FTC237R measures 0.093" Dia x 0.250" L, CMF50237R00FHEB measures 0.065" Dia x 0.150" L, and CMF55237R00FHEB measures 0.090" Dia x 0.240" L. Verify PCB hole spacing and component clearance for your specific application layout.

Q: Do the substitute parts have moisture resistant features? A: Yes. Both CMF50237R00FHEB and CMF55237R00FHEB include moisture resistant features in addition to flame retardant coating. The original RNF14FTC237R specifies flame retardant coating and safety features without explicit moisture resistant designation.

Q: What is the operating temperature difference between parts? A: RNF14FTC237R operates from -55°C to 155°C. Both substitute parts (CMF50237R00FHEB and CMF55237R00FHEB) operate from -55°C to 175°C, providing a 20°C extended upper temperature limit.

Q: Which substitute part should be selected for new designs? A: CMF50237R00FHEB is recommended for direct replacement applications requiring identical power rating and electrical performance. CMF55237R00FHEB is appropriate when additional thermal margin or power dissipation capability is beneficial to circuit design. Both parts maintain full regulatory compliance and are in active production.