RNF14FTC187R Equivalent & Substitute Parts

Part Overview

The RNF14FTC187R is a 187 Ohm ±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 electronic applications requiring precision resistance values. The part is currently active in production with 977 units in stock. Substitute parts may be required due to inventory availability, packaging format preferences, or application-specific performance requirements such as higher power ratings or enhanced environmental specifications.

Substiute Parts

RNF14FTC187R

Stackpole Electronics IncIn Stock: 1025RNF14FTC187R Datasheet

Current PartRFQ

CMF55187R00FHEB

Vishay DaleIn Stock: 1779CMF55187R00FHEB Datasheet

UpgradeRFQ

CMF50187R00FHEB

Vishay DaleIn Stock: 1792CMF50187R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC187R is determined by the following critical parameters:

• Resistance Value: Must be 187 Ohms
• Tolerance: Must be ±1%
• Composition: Must be Metal Film
• Package Type: Must be Axial
• Temperature Coefficient: Must be ±50ppm/°C
• Compliance: Must maintain ROHS3 compliance

The substitute parts listed below meet all mandatory electrical and mechanical parameters. Variations in power rating (0.5W vs. 0.25W), physical dimensions, and operating temperature range represent allowable differences that do not affect functional substitution within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

CMF50187R00FHEB (MFR Recommended): This part is the direct electrical equivalent to the RNF14FTC187R, matching the 0.25W power rating and all critical electrical parameters. It is manufactured by Vishay Dale and maintains ROHS3 compliance. The reduced physical dimensions (0.065" Dia x 0.150" L) may provide space advantages in compact circuit layouts. This part is recommended for applications requiring identical electrical performance with alternative sourcing.

CMF55187R00FHEB (Upgrade): This part provides enhanced performance through a higher 0.5W power rating while maintaining identical resistance, tolerance, and temperature coefficient specifications. The extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C) offers improved thermal margin. This upgrade is suitable for applications where increased power dissipation capability or wider temperature operation is beneficial. Physical dimensions are comparable to the main part (0.090" Dia x 0.240" L).

Both substitute parts are active products with robust inventory availability and full compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can CMF50187R00FHEB be used as a direct replacement for RNF14FTC187R?

A: Yes. Both parts share identical resistance (187 Ohms), tolerance (±1%), power rating (0.25W), composition (Metal Film), and temperature coefficient (±50ppm/°C). The primary difference is physical size, with CMF50187R00FHEB being more compact. Both are ROHS3 compliant and suitable for equivalent circuit applications.

Q: What is the advantage of using CMF55187R00FHEB over the main part?

A: CMF55187R00FHEB provides a higher power rating (0.5W vs. 0.25W) and extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C). These enhancements allow operation in higher thermal environments and applications with greater power dissipation requirements, while maintaining all other electrical specifications.

Q: Are there packaging format differences between these parts?

A: Yes. RNF14FTC187R is supplied in Tape & Reel (TR) format, while both CMF55187R00FHEB and CMF50187R00FHEB are supplied in Cut Tape (CT) format. This affects handling and automated assembly processes but does not impact electrical performance.

Q: Do all three parts meet the same compliance standards?

A: Yes. RNF14FTC187R, CMF55187R00FHEB, and CMF50187R00FHEB are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part should be selected for space-constrained applications?

A: CMF50187R00FHEB is the smallest option with dimensions of 0.065" Dia x 0.150" L, making it suitable for compact circuit layouts where physical size is a constraint.