RNF14BTC4K99 Equivalent & Substitute Parts

Part Overview

The RNF14BTC4K99 is a 4.99 kOhms ±0.1% 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 precision applications requiring tight tolerance specifications. The part is currently active in production with ROHS3 compliance and is suitable for applications where high accuracy and stable performance across temperature ranges are required.

Substitute parts are identified when equivalent electrical characteristics and mechanical compatibility allow direct replacement while maintaining circuit performance and reliability standards.

Substiute Parts

RNF14BTC4K99

Stackpole Electronics IncIn Stock: 830RNF14BTC4K99 Datasheet

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CMF554K9900BHEB

Vishay DaleIn Stock: 3802CMF554K9900BHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14BTC4K99 is determined by the following criteria:

• Identical resistance value: 4.99 kOhms
• Matching tolerance specification: ±0.1%
• Identical composition: Metal Film
• Matching temperature coefficient: ±50ppm/°C
• Axial package configuration
• Equal or higher power rating capability
• Compliance with ROHS3 and REACH standards

The CMF554K9900BHEB qualifies as a substitute based on these parameters. While it features a higher power rating (0.5W versus 0.25W) and extended maximum operating temperature (175°C versus 155°C), these represent performance enhancements that do not compromise compatibility. The identical resistance, tolerance, composition, and temperature coefficient ensure electrical equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14BTC4K99 and CMF554K9900BHEB are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The CMF554K9900BHEB provides enhanced performance characteristics through increased power dissipation capability (0.5W versus 0.25W) and extended maximum operating temperature (175°C versus 155°C). The addition of moisture-resistant features in the CMF series provides supplementary environmental protection. These enhancements do not introduce incompatibility and support applications with more demanding thermal or environmental conditions.

Selection between these components should be based on specific application requirements regarding power dissipation, operating temperature environment, and packaging availability. Both components maintain identical electrical specifications for resistance, tolerance, and temperature coefficient, ensuring functional equivalence in precision circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the CMF554K9900BHEB directly replace the RNF14BTC4K99 in existing designs?

A: Yes. Both components share identical resistance (4.99 kOhms), tolerance (±0.1%), composition (metal film), and temperature coefficient (±50ppm/°C). The higher power rating and extended temperature range of the CMF554K9900BHEB do not create incompatibility. Physical dimensions are comparable for axial through-hole mounting.

Q: What is the significance of the higher power rating in the CMF554K9900BHEB?

A: The 0.5W rating versus 0.25W provides greater thermal margin and allows operation in applications with higher power dissipation requirements. This does not affect circuits designed for the lower power rating.

Q: Are there packaging differences between these components?

A: Both components use axial package configuration suitable for through-hole mounting. The CMF554K9900BHEB is supplied in Cut Tape (CT) packaging while the RNF14BTC4K99 is supplied in Tape & Reel (TR) packaging. Physical dimensions are similar (RNF: 0.093" Dia x 0.250" L; CMF: 0.090" Dia x 0.240" L).

Q: Do both components meet current compliance standards?

A: Yes. Both the RNF14BTC4K99 and CMF554K9900BHEB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.

Q: What is the significance of moisture resistance in the CMF554K9900BHEB?

A: The moisture-resistant feature provides additional environmental protection in applications exposed to humidity or condensation. This represents an enhancement over the base RNF14BTC4K99 specification and does not create incompatibility.