RNF14FTC402R Equivalent & Substitute Parts

Part Overview

The RNF14FTC402R is a 402 Ohm ±1% 1/4W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety design, 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 for design flexibility, inventory management, or supply chain optimization.

Substiute Parts

RNF14FTC402R

Stackpole Electronics IncIn Stock: 724RNF14FTC402R Datasheet

Current PartRFQ

CMF55402R00FHEB

Vishay DaleIn Stock: 5617CMF55402R00FHEB Datasheet

UpgradeRFQ

CPF1402R00FEEE6

Vishay DaleIn Stock: 1584CPF1402R00FEEE6 Datasheet

UpgradeRFQ

CMF50402R00FHEB

Vishay DaleIn Stock: 1172CMF50402R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC402R are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain 402 Ohm resistance with ±1% tolerance and metal film composition, ensuring functional interchangeability in circuit applications.

Mechanical Compatibility: All parts use axial through-hole packaging with 2 terminations, compatible with standard PCB layouts designed for the RNF14FTC402R.

Environmental Specifications: Substitute parts operate within or exceed the -55°C to 155°C temperature range of the main part. Temperature coefficient remains ±50ppm/°C or better.

Compliance: All parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the main part.

Power Rating Variations: Substitute parts are available in 1/4W (matched rating), 1/2W (upgrade), and 1W (upgrade) configurations. Higher power ratings provide thermal margin in applications where the 1/4W rating is marginal.

Parameter Comparison

Engineering Selection Recommendations

CMF50402R00FHEB (MFR Recommended): This part provides direct electrical and mechanical equivalence to the RNF14FTC402R with identical 0.25W power rating and ±50ppm/°C temperature coefficient. The CMF50 series offers extended operating temperature range (-55°C to 175°C) and moisture-resistant features. Physical dimensions are smaller (0.065" Dia x 0.150" L), which may require PCB layout verification for existing designs. This part is manufacturer-recommended for direct substitution.

CMF55402R00FHEB (Upgrade Option): This 0.5W rated part maintains electrical equivalence while providing increased thermal headroom. The 1/2W power rating accommodates applications where the 1/4W rating approaches dissipation limits. Operating temperature extends to 175°C. Physical dimensions (0.090" Dia x 0.240" L) are compatible with standard axial footprints. Moisture-resistant coating enhances reliability in humid environments.

CPF1402R00FEEE6 (High-Performance Upgrade): This 1W rated part offers the highest thermal margin and widest operating temperature range (-65°C to 230°C). The ±25ppm/°C temperature coefficient provides superior stability compared to the ±50ppm/°C specification of the main part. Flame-proof construction exceeds the flame-retardant rating of the RNF14FTC402R. This part is suitable for demanding applications requiring extended temperature operation and enhanced frequency stability.

All substitute parts are Active status and ROHS3 compliant, meeting regulatory requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can CMF50402R00FHEB be used as a direct replacement for RNF14FTC402R?

A: Yes. Both parts share identical electrical specifications (402 Ohms ±1%, 0.25W, ±50ppm/°C) and axial through-hole packaging. The CMF50 series is manufacturer-recommended for substitution. Physical dimensions differ slightly (CMF50 is smaller), requiring verification that the PCB footprint accommodates the reduced size.

Q: What is the difference between the 0.25W, 0.5W, and 1W rated substitutes?

A: Power rating indicates maximum continuous power dissipation. The 0.25W main part and CMF50402R00FHEB are electrically equivalent. The CMF55402R00FHEB (0.5W) and CPF1402R00FEEE6 (1W) provide increased thermal capacity for applications where resistor dissipation approaches or exceeds 0.25W. Higher power ratings do not change electrical performance but improve reliability margin in high-dissipation circuits.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The RNF14FTC402R and all listed substitute parts (CMF50402R00FHEB, CMF55402R00FHEB, CPF1402R00FEEE6) are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements.

Q: What is the temperature coefficient difference between parts?

A: The RNF14FTC402R and CMF series parts specify ±50ppm/°C. The CPF1402R00FEEE6 specifies ±25ppm/°C, providing superior frequency stability and lower resistance drift over temperature. This enhanced specification is beneficial in precision analog circuits and frequency-dependent applications.

Q: Do physical dimension differences affect PCB compatibility?

A: Yes. The CMF50402R00FHEB is physically smaller (0.065" Dia x 0.150" L) than the RNF14FTC402R (0.093" Dia x 0.250" L). The CMF55402R00FHEB and CPF1402R00FEEE6 are similar in size to the main part (0.090" Dia x 0.240" L). PCB layouts designed for the RNF14FTC402R may require modification to accommodate the CMF50 series. The CMF55 and CPF1 series are mechanically compatible with existing axial footprints.

Q: Which substitute part offers the widest operating temperature range?

A: The CPF1402R00FEEE6 operates from -65°C to 230°C, exceeding the RNF14FTC402R range of -55°C to 155°C. This extended range is suitable for applications in extreme thermal environments or where future temperature margin is required.