RNF14FTC453K Equivalent & Substitute Parts

Part Overview

The RNF14FTC453K is a 453 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-grade construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 671 units available in inventory. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when design requirements permit higher power ratings or enhanced environmental performance.

Substiute Parts

RNF14FTC453K

Stackpole Electronics IncIn Stock: 734RNF14FTC453K Datasheet

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CMF55453K00FHEB

Vishay DaleIn Stock: 2963CMF55453K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RNF14FTC453K is permissible based on the following criteria:

Mandatory Matching Parameters:

• Resistance value: 453 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package type: Axial
• Temperature coefficient: ±50ppm/°C
• RoHS compliance: ROHS3 Compliant

Allowable Variation Parameters:

• Power rating: May be equal to or greater than 0.25W
• Operating temperature range: May be equal to or exceed -55°C ~ 155°C
• Physical dimensions: Minor variations acceptable within axial package constraints
• Packaging format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for component selection

The CMF55453K00FHEB from Vishay Dale meets all mandatory matching criteria and provides enhanced specifications in power rating (0.5W vs. 0.25W) and maximum operating temperature (175°C vs. 155°C).

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC453K and CMF55453K00FHEB are active production components with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on application power dissipation requirements and thermal operating conditions.

The RNF14FTC453K is suitable for applications with power dissipation not exceeding 0.25W and operating temperatures within the -55°C to 155°C range.

The CMF55453K00FHEB provides enhanced thermal performance with a 0.5W power rating and extended maximum operating temperature to 175°C, making it suitable for higher power dissipation applications and environments with elevated temperature exposure. The addition of moisture-resistant properties in the CMF55 series provides supplementary environmental protection.

Both components maintain identical electrical characteristics (resistance value, tolerance, and temperature coefficient) and are suitable for direct substitution in circuit designs where the higher power rating and extended temperature range of the substitute part do not create design conflicts.

Frequently Asked Questions (FAQ)

Q: Can the CMF55453K00FHEB replace the RNF14FTC453K in all applications?

A: The CMF55453K00FHEB can replace the RNF14FTC453K when circuit board space and thermal design permit the slightly smaller physical dimensions (0.090" Dia x 0.240" L vs. 0.093" Dia x 0.250" L). The higher power rating (0.5W vs. 0.25W) and extended operating temperature range (to 175°C) make it suitable for applications where the original part specifications are met or exceeded.

Q: Are there any compatibility concerns with PCB footprints?

A: Both components use axial package types with identical lead spacing and termination configuration. Minor dimensional variations (approximately 3% difference in diameter and 4% in length) fall within standard axial component tolerances and do not require PCB footprint redesign.

Q: What is the significance of the moisture-resistant feature in the CMF55 series?

A: The moisture-resistant coating in the CMF55453K00FHEB provides enhanced protection in humid or high-moisture environments. This feature is not present in the RNF14FTC453K but does not prevent substitution; it represents an additional capability of the substitute part.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RNF14FTC453K and CMF55453K00FHEB are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS codes (8533.21.0090).

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is supplied on continuous reels suitable for automated pick-and-place assembly. Cut Tape (CT) packaging is supplied in individual tape segments. Both formats contain identical components; packaging selection depends on assembly process requirements and order quantity.