RNF14FTC374R Equivalent & Substitute Parts

Part Overview

The RNF14FTC374R is a 374 Ohm ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety construction, with an operating temperature range of -55°C to 155°C. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, extended lead times, or design flexibility within allowable parameter tolerances.

Substiute Parts

RNF14FTC374R

Stackpole Electronics IncIn Stock: 1122RNF14FTC374R Datasheet

Current PartRFQ

CMF55374R00FHEB

Vishay DaleIn Stock: 4089CMF55374R00FHEB Datasheet

UpgradeRFQ

CMF50374R00FHEB

Vishay DaleIn Stock: 4824CMF50374R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC374R are qualified based on the following criteria:

Electrical Equivalence: Resistance value (374 Ohms) and tolerance (±1%) must be identical. Temperature coefficient (±50ppm/°C) must match.

Mechanical Compatibility: Package type must be Axial through-hole configuration to ensure PCB footprint compatibility.

Composition & Features: Metal film construction with flame retardant coating and safety features must be maintained.

Compliance & Status: All substitute parts must be Active status and ROHS3 compliant.

Power Rating Flexibility: Substitute parts may have equal or higher power ratings (0.25W or greater) while maintaining all other electrical specifications. Higher power ratings provide design margin without affecting circuit performance at the specified 0.25W operating point.

The identified substitutes are:

• CMF55374R00FHEB (0.5W upgrade option)
• CMF50374R00FHEB (0.25W direct equivalent)

Parameter Comparison

Engineering Selection Recommendations

CMF50374R00FHEB (Direct Equivalent): This part provides identical electrical and power specifications to the RNF14FTC374R. Both are 0.25W rated with 374 Ohm ±1% resistance and ±50ppm/°C temperature coefficient. The CMF50 offers extended operating temperature range (-55°C to 175°C versus -55°C to 155°C) and additional moisture resistance. All compliance requirements (ROHS3, Active status) are met. Physical dimensions differ slightly (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L), requiring PCB layout verification for axial lead spacing.

CMF55374R00FHEB (Upgrade Option): This part maintains all electrical specifications but provides 0.5W power rating, double that of the original. The higher power rating introduces additional design margin for thermal performance without altering circuit behavior at 0.25W operation. Extended operating temperature range and moisture resistance are provided. Physical dimensions differ (0.090" Dia x 0.240" L), requiring PCB layout verification.

Both substitutes are manufactured by Vishay Dale, an established supplier with Active product status and full ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can CMF55374R00FHEB (0.5W) be used in place of RNF14FTC374R (0.25W)?

A: Yes. The higher power rating does not affect circuit operation at the 0.25W design point. All electrical parameters (resistance, tolerance, temperature coefficient) are identical. Physical dimensions differ and require PCB footprint verification for axial lead spacing.

Q: What is the difference between CMF50374R00FHEB and CMF55374R00FHEB?

A: Both are Vishay Dale metal film axial resistors with 374 Ohm ±1% specifications. CMF50 is rated 0.25W (direct equivalent to RNF14FTC374R), while CMF55 is rated 0.5W. CMF55 provides additional thermal margin. Physical dimensions differ between the two series.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RNF14FTC374R, CMF50374R00FHEB, and CMF55374R00FHEB are all ROHS3 compliant with Active product status.

Q: Do the substitute parts have the same operating temperature range?

A: RNF14FTC374R operates -55°C to 155°C. Both CMF substitutes extend this to -55°C to 175°C, providing wider temperature margin.

Q: Are physical dimensions identical between the main part and substitutes?

A: No. RNF14FTC374R measures 0.093" Dia x 0.250" L. CMF50374R00FHEB measures 0.065" Dia x 0.150" L. CMF55374R00FHEB measures 0.090" Dia x 0.240" L. PCB layout verification is required for axial lead hole spacing and component clearance.

Q: Can these parts be used interchangeably on existing PCBs?

A: Electrical substitution is valid. Physical dimensions differ, requiring verification that axial lead spacing and component clearance accommodate the substitute part dimensions before PCB assembly.