RNF14FTC56R2 Equivalent & Substitute Parts

Part Overview

The RNF14FTC56R2 is a 56.2 Ohm ±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 with thermal stability across industrial temperature ranges. The part maintains Active product status with 925 units in current inventory. Substitute parts are identified to address availability, enhanced performance specifications, or packaging format requirements while maintaining electrical and mechanical compatibility within defined parameters.

Substiute Parts

RNF14FTC56R2

Stackpole Electronics IncIn Stock: 1001RNF14FTC56R2 Datasheet

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CMF5556R200FHEB

Vishay DaleIn Stock: 3861CMF5556R200FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FTC56R2 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 56.2 Ohms (exact match required)
• Tolerance: ±1% (precision class must be maintained)
• Composition: Metal Film (electrical characteristics and stability)
• Temperature Coefficient: ±50ppm/°C (thermal performance specification)
• Package Type: Axial Through-Hole (mechanical and electrical interface)
• Termination Count: 2 (standard axial configuration)

Allowable Variation Parameters:

• Power Rating: May be equal or higher (0.25W or greater)
• Operating Temperature Range: May be equal or extended (minimum -55°C to 155°C)
• Physical Dimensions: Minor variations acceptable within axial package standards
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for component selection
• Manufacturer: Different manufacturers permitted if all electrical and mechanical parameters align

The CMF5556R200FHEB qualifies as a substitute based on matching all mandatory parameters while offering enhanced power rating (0.5W vs. 0.25W) and extended operating temperature range (-55°C to 175°C).

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FTC56R2 and CMF5556R200FHEB maintain Active product status and full ROHS3 compliance with REACH Unaffected designation, confirming regulatory alignment for industrial and commercial applications.

The CMF5556R200FHEB substitute provides enhanced thermal performance through a higher power rating (0.5W vs. 0.25W) and extended maximum operating temperature (175°C vs. 155°C), making it suitable for applications with elevated thermal stress or margin requirements. The addition of moisture-resistant properties in the substitute part offers supplementary environmental protection.

Physical dimensions differ slightly between the two parts (diameter and length variations within 3-4%), which remains compatible with standard axial through-hole PCB layouts and component spacing. The transition from Tape & Reel to Cut Tape packaging does not affect electrical performance or mechanical fit.

Selection between these parts should be based on application thermal requirements, available inventory, and procurement lead times. Both parts satisfy the core electrical specification of 56.2 Ohms ±1% with identical temperature coefficient performance.

Frequently Asked Questions (FAQ)

Q: Can the CMF5556R200FHEB directly replace the RNF14FTC56R2 in existing designs?

A: Yes. Both parts share identical resistance value (56.2 Ohms), tolerance (±1%), temperature coefficient (±50ppm/°C), and axial through-hole package configuration. Physical dimensions vary by less than 4%, which is compatible with standard PCB layouts. The higher power rating of the substitute (0.5W vs. 0.25W) does not create compatibility issues.

Q: What is the significance of the power rating difference?

A: The CMF5556R200FHEB is rated at 0.5W compared to the RNF14FTC56R2 at 0.25W. This means the substitute can dissipate twice the power while maintaining the same resistance value and tolerance. In applications where the original 0.25W rating is sufficient, the higher-rated substitute provides additional thermal margin and reliability headroom.

Q: Are there differences in environmental compliance?

A: Both parts are ROHS3 Compliant and REACH Unaffected. The CMF5556R200FHEB includes moisture-resistant properties as an additional feature, while the RNF14FTC56R2 specifies flame retardant coating and safety construction. Both meet industrial safety and environmental standards.

Q: How do the operating temperature ranges compare?

A: The RNF14FTC56R2 operates from -55°C to 155°C. The CMF5556R200FHEB extends the upper limit to 175°C, providing a 20°C margin for high-temperature applications. Both maintain the same lower temperature limit of -55°C.

Q: Does packaging format affect component selection?

A: The RNF14FTC56R2 is supplied in Tape & Reel (TR) format, while the CMF5556R200FHEB is available in Cut Tape (CT) format. Both formats contain identical components; the difference is in handling and storage configuration. Format selection depends on assembly process requirements and inventory management practices rather than electrical or mechanical compatibility.

Q: What tolerance class do these resistors represent?

A: Both parts are ±1% tolerance metal film resistors, classified as precision-grade components. This tolerance level is suitable for applications requiring stable, accurate resistance values across temperature and time.