RNF14FTC187K Equivalent & Substitute Parts

Part Overview

The RNF14FTC187K is a 187 kOhms ±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 in compact form factors. The part is currently active in production with 979 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameter ranges.

Substiute Parts

RNF14FTC187K

Stackpole Electronics IncIn Stock: 1026RNF14FTC187K Datasheet

Current PartRFQ

CMF55187K00FHEB

Vishay DaleIn Stock: 1241CMF55187K00FHEB Datasheet

UpgradeRFQ

CMF50187K00FHEB

Vishay DaleIn Stock: 2966CMF50187K00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC187K are qualified based on the following critical parameters:

• Resistance value: 187 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Package Type: Axial (exact match required)
• RoHS Compliance: ROHS3 Compliant (maintained)

Substitutes are grouped into two categories: manufacturer-recommended direct replacement (CMF50187K00FHEB) and upgrade option with increased power rating (CMF55187K00FHEB). Both maintain identical electrical specifications while offering enhanced thermal performance or alternative sourcing through Vishay Dale.

Parameter Comparison

Engineering Selection Recommendations

CMF50187K00FHEB is the manufacturer-recommended direct replacement for RNF14FTC187K. This part maintains identical electrical specifications and power rating while offering extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and moisture-resistant construction. Both parts are ROHS3 compliant and suitable for direct substitution in existing designs.

CMF55187K00FHEB provides an upgrade path with doubled power rating (0.5W versus 0.25W) while maintaining all other electrical parameters. This option is applicable in designs where thermal margin improvement is beneficial or where component stress reduction is desired. Extended operating temperature range and moisture-resistant features are retained.

All substitute parts maintain active product status and are available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can CMF50187K00FHEB be used as a direct replacement for RNF14FTC187K?

A: Yes. CMF50187K00FHEB is the manufacturer-recommended direct replacement. Both parts share identical resistance (187 kOhms), tolerance (±1%), power rating (0.25W), composition (metal film), and temperature coefficient (±50ppm/°C). The substitute offers extended operating temperature range and moisture-resistant construction.

Q: What is the difference between CMF50187K00FHEB and CMF55187K00FHEB?

A: The primary difference is power rating. CMF50187K00FHEB is rated at 0.25W (matching the original part), while CMF55187K00FHEB is rated at 0.5W. All other electrical parameters remain identical. The upgrade option provides increased thermal capacity for applications requiring additional power dissipation margin.

Q: Are there physical size differences between these parts?

A: Yes. RNF14FTC187K measures 0.093" Dia x 0.250" L (2.35mm x 6.35mm). CMF50187K00FHEB measures 0.065" Dia x 0.150" L (1.65mm x 3.81mm). CMF55187K00FHEB measures 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Physical dimensions must be verified against PCB layout constraints before substitution.

Q: Do all parts meet the same compliance standards?

A: Yes. RNF14FTC187K, CMF50187K00FHEB, and CMF55187K00FHEB are all ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What packaging formats are available?

A: RNF14FTC187K is supplied in Tape & Reel (TR) format. Both Vishay Dale substitutes (CMF50187K00FHEB and CMF55187K00FHEB) are supplied in Cut Tape (CT) format. Packaging format selection depends on assembly process requirements.