RNF14FTC158R Equivalent & Substitute Parts

Part Overview

The RNF14FTC158R is a 158 Ohms ±1% 0.25W (1/4W) through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal film resistor features flame retardant coating and safety construction, designed for general-purpose electronic applications requiring precision resistance values with tight tolerance specifications. The part maintains Active product status with 1153 units in current 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 specifications.

Substiute Parts

RNF14FTC158R

Stackpole Electronics IncIn Stock: 1197RNF14FTC158R Datasheet

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CMF55158R00FHEB

Vishay DaleIn Stock: 1518CMF55158R00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC158R is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 158 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Package Type: Axial (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)

Allowable Variation Parameters:

• Power Rating: May be equal or higher than 0.25W
• Operating Temperature Range: May be equal or extended
• Physical Dimensions: Minor variations acceptable within axial package constraints
• Packaging Format: May differ (Tape & Reel to Cut Tape conversion acceptable)
• Features: May include additional enhancements (moisture resistance)

The CMF55158R00FHEB qualifies as a valid substitute based on matching all mandatory parameters while offering an upgraded power rating (0.5W vs 0.25W) and extended operating temperature range (-55°C to 175°C vs -55°C to 155°C).

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC158R and CMF55158R00FHEB maintain Active product status and full ROHS3 compliance, confirming suitability for current production environments. The CMF55158R00FHEB provides enhanced specifications through increased power dissipation capability (0.5W vs 0.25W) and extended maximum operating temperature (175°C vs 155°C), with the addition of moisture-resistant properties. Selection between these parts depends on circuit power requirements and thermal operating conditions. The CMF55158R00FHEB is suitable for applications where the original 0.25W rating may approach or exceed design margins, or where operation at elevated temperatures is anticipated. Both parts satisfy identical electrical performance criteria for resistance value, tolerance, and temperature coefficient specifications.

Frequently Asked Questions (FAQ)

Q: Can CMF55158R00FHEB be used as a direct replacement for RNF14FTC158R?

A: Yes, the CMF55158R00FHEB is electrically and mechanically compatible. Both parts share identical resistance value (158 Ohms), tolerance (±1%), composition (metal film), and temperature coefficient (±50ppm/°C). The substitute offers higher power rating and extended temperature range, making it suitable for applications where the original part specifications are met or exceeded.

Q: What are the physical dimension differences?

A: The RNF14FTC158R measures 0.093" diameter x 0.250" length (2.35mm x 6.35mm). The CMF55158R00FHEB measures 0.090" diameter x 0.240" length (2.29mm x 6.10mm). Both are axial package format with minor dimensional variations that remain compatible with standard through-hole PCB layouts.

Q: Does the packaging format change affect compatibility?

A: The RNF14FTC158R is supplied in Tape & Reel format, while the CMF55158R00FHEB is supplied in Cut Tape format. This difference affects only the procurement and handling process, not the component itself or its electrical performance. Both formats contain identical components suitable for manual or automated assembly.

Q: Are there compliance or certification differences?

A: Both parts maintain ROHS3 compliance and REACH Unaffected status. The CMF55158R00FHEB includes additional moisture-resistant properties not specified for the RNF14FTC158R, providing enhanced environmental protection without affecting core electrical specifications.

Q: When should the higher power rating of CMF55158R00FHEB be considered?

A: The 0.5W rating of the CMF55158R00FHEB provides additional thermal margin compared to the 0.25W rating of the RNF14FTC158R. Use the substitute when circuit analysis indicates power dissipation approaching or exceeding 0.25W, or when design margins require additional headroom for reliability.