RNF14FTC178K Equivalent & Substitute Parts

Part Overview

The RNF14FTC178K is a 178 kOhms ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component is designed for general-purpose applications requiring precision resistance with flame retardant coating and safety features. The part is currently in active production status with 785 units available in inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

RNF14FTC178K

Stackpole Electronics IncIn Stock: 827RNF14FTC178K Datasheet

Current PartRFQ

CMF55178K00FHEB

Vishay DaleIn Stock: 1051CMF55178K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC178K is determined by the following critical parameters:

• Resistance Value: Must be 178 kOhms
• Tolerance: Must be ±1% or tighter
• Composition: Must be metal film
• Package Type: Must be axial through-hole
• Temperature Coefficient: Must be ±50ppm/°C or better
• Compliance: Must maintain ROHS3 compliance and REACH unaffected status

The CMF55178K00FHEB from Vishay Dale meets all substitution criteria. While this part features a higher power rating (0.5W vs 0.25W) and extended upper operating temperature (-55°C to 175°C vs -55°C to 155°C), these represent performance enhancements that do not restrict substitution in applications designed for the RNF14FTC178K.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC178K and CMF55178K00FHEB are active production components with full ROHS3 compliance and REACH unaffected status, making them suitable for regulated applications. The CMF55178K00FHEB provides enhanced performance characteristics including higher power dissipation capability and extended upper operating temperature range. Selection between these parts should be based on application-specific requirements for power handling and thermal operating conditions. Both components maintain identical electrical specifications for resistance, tolerance, and temperature coefficient, ensuring functional equivalence in standard circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the CMF55178K00FHEB directly replace the RNF14FTC178K in existing designs?

A: Yes. Both parts share identical resistance value (178 kOhms), tolerance (±1%), composition (metal film), temperature coefficient (±50ppm/°C), and axial package configuration. The substitute part's higher power rating and extended temperature range do not restrict substitution.

Q: What is the difference in physical dimensions between these parts?

A: The RNF14FTC178K measures 0.093" diameter × 0.250" length (2.35mm × 6.35mm). The CMF55178K00FHEB measures 0.090" diameter × 0.240" length (2.29mm × 6.10mm). Both are axial through-hole components with compatible PCB footprints.

Q: Are there packaging format differences?

A: Yes. The RNF14FTC178K is supplied in Tape & Reel (TR) format, while the CMF55178K00FHEB is supplied in Cut Tape (CT) format. This affects procurement and assembly processes but does not impact electrical or mechanical compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RNF14FTC178K and CMF55178K00FHEB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the significance of the higher power rating on the substitute part?

A: The CMF55178K00FHEB's 0.5W rating versus the RNF14FTC178K's 0.25W rating provides greater thermal margin in applications with higher dissipation requirements. This enhancement does not affect compatibility in designs specified for 0.25W components.