RNF14FTC45K3 Equivalent & Substitute Parts

Part Overview

The RNF14FTC45K3 is a 45.3 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-rated construction suitable for general-purpose electronic applications. The part maintains Active product status with 908 units currently in stock. Substitute parts are identified to address inventory availability, extended operating temperature ranges, or increased power dissipation requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

RNF14FTC45K3

Stackpole Electronics IncIn Stock: 978RNF14FTC45K3 Datasheet

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CMF5545K300FHEB

Vishay DaleIn Stock: 2068CMF5545K300FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC45K3 is determined by the following critical parameters:

• Resistance Value: Must be 45.3 kOhms
• Tolerance: Must be ±1%
• Composition: Must be Metal Film
• Package Type: Must be Axial
• Temperature Coefficient: Must be ±50ppm/°C
• Regulatory Compliance: Must maintain ROHS3 Compliant status

The CMF5545K300FHEB qualifies as a substitute part because it matches all mandatory electrical parameters and maintains equivalent regulatory compliance. The substitute part offers increased power dissipation capability (0.5W versus 0.25W) and an extended maximum operating temperature (175°C versus 155°C), providing design flexibility for applications requiring higher thermal performance.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC45K3 and CMF5545K300FHEB maintain Active product status and full ROHS3 compliance with REACH Unaffected designation, ensuring regulatory compatibility for current and future applications. Selection between these parts should be based on application-specific requirements:

The RNF14FTC45K3 is appropriate for standard applications operating within the -55°C to 155°C temperature range with power dissipation not exceeding 0.25W. The CMF5545K300FHEB is suitable for applications requiring extended thermal performance, higher power dissipation capability (0.5W), or operation at elevated temperatures up to 175°C. The CMF5545K300FHEB additionally incorporates moisture-resistant features, providing enhanced environmental protection. Both parts are electrically and mechanically interchangeable within their respective thermal and power specifications.

Frequently Asked Questions (FAQ)

Q: Can CMF5545K300FHEB replace RNF14FTC45K3 in any application?

A: CMF5545K300FHEB is electrically and mechanically compatible with RNF14FTC45K3 for applications operating within the RNF14FTC45K3 specifications (-55°C to 155°C, ≤0.25W dissipation). The substitute part's higher power rating and extended temperature range do not create incompatibility in standard applications.

Q: What are the physical dimension differences?

A: RNF14FTC45K3 dimensions are 0.093" Dia x 0.250" L (2.35mm x 6.35mm). CMF5545K300FHEB dimensions are 0.090" Dia x 0.240" L (2.29mm x 6.10mm). Both are axial package configuration with equivalent lead spacing and mounting compatibility.

Q: Are both parts suitable for high-temperature applications?

A: RNF14FTC45K3 operates to 155°C maximum. CMF5545K300FHEB operates to 175°C maximum. For applications exceeding 155°C, CMF5545K300FHEB is the appropriate selection.

Q: Do packaging differences affect circuit board assembly?

A: RNF14FTC45K3 is supplied in Tape & Reel (TR) packaging. CMF5545K300FHEB is supplied in Cut Tape (CT) packaging. Both formats are compatible with standard through-hole assembly processes. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Are both parts RoHS compliant?

A: Both RNF14FTC45K3 and CMF5545K300FHEB are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component manufacturing and use.