RNF14FTC14K3 Equivalent & Substitute Parts

Part Overview

The RNF14FTC14K3 is a 14.3 kOhms ±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, designed for applications requiring precision resistance values in compact form factors. The part is currently active in production with 865 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified tolerance parameters.

Substiute Parts

RNF14FTC14K3

Stackpole Electronics IncIn Stock: 936RNF14FTC14K3 Datasheet

Current PartRFQ

CMF5514K300FHEB

Vishay DaleIn Stock: 1727CMF5514K300FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC14K3 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 14.3 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package: Axial through-hole
• Temperature Coefficient: ±50ppm/°C
• RoHS Compliance: ROHS3 Compliant

Allowable Variation Parameters:

• Power rating may be equal or higher (upgrade acceptable)
• Operating temperature range may be equal or extended (upgrade acceptable)
• Physical dimensions may vary within axial package constraints
• Packaging format may differ (Tape & Reel vs. Cut Tape)

The CMF5514K300FHEB from Vishay Dale meets all mandatory matching criteria and provides an upgraded power rating (0.5W vs. 0.25W) and extended operating temperature range (-55°C ~ 175°C vs. -55°C ~ 155°C), making it a valid substitute for applications where higher power dissipation capability or wider temperature operation is beneficial or neutral.

Parameter Comparison

Engineering Selection Recommendations

The CMF5514K300FHEB qualifies as a direct substitute based on matching resistance, tolerance, composition, and temperature coefficient specifications. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility.

The substitute part provides upgraded specifications: increased power dissipation capability (0.5W vs. 0.25W) and extended maximum operating temperature (175°C vs. 155°C). These upgrades do not introduce incompatibility and may provide additional design margin in thermal or power-constrained applications.

Physical dimensions are comparable within axial package tolerances. The substitute includes moisture-resistant features in addition to flame retardant coating, providing enhanced environmental protection.

Packaging format differs between Tape & Reel and Cut Tape; selection depends on assembly process requirements and procurement volume.

Frequently Asked Questions (FAQ)

Q: Can CMF5514K300FHEB replace RNF14FTC14K3 in existing designs?

A: Yes. Both components share identical resistance (14.3 kOhms), tolerance (±1%), composition (metal film), and temperature coefficient (±50ppm/°C). The substitute provides equal or superior electrical performance with upgraded power rating and operating temperature range.

Q: What is the significance of the power rating difference?

A: The substitute is rated at 0.5W versus the original 0.25W. This upgrade allows the component to dissipate more heat without exceeding rated specifications. In applications where the original 0.25W rating was adequate, the higher rating introduces no penalty and provides additional thermal margin.

Q: Are there physical compatibility concerns?

A: Both components use axial through-hole packaging. Dimensions are comparable (0.093" vs. 0.090" diameter; 0.250" vs. 0.240" length). These minor variations fall within standard axial package tolerances and do not affect PCB footprint compatibility or lead spacing.

Q: Does the packaging format change affect usability?

A: The main part is supplied in Tape & Reel format; the substitute is supplied in Cut Tape format. This affects procurement and assembly handling but does not impact electrical or mechanical performance. Selection depends on assembly equipment and volume requirements.

Q: Are both components RoHS compliant?

A: Yes. Both RNF14FTC14K3 and CMF5514K300FHEB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.