RNF14FAC475K Equivalent & Substitute Parts

Part Overview

The RNF14FAC475K is a 475 kOhms ±1% metal film axial resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This through-hole component features flame retardant coating and safety construction, with an operating temperature range of -55°C to 155°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent resistance values, tolerance specifications, and mechanical compatibility requirements must be maintained while potentially upgrading performance characteristics such as power rating, temperature coefficient, or operating temperature range.

Substiute Parts

RNF14FAC475K

Stackpole Electronics IncIn Stock: 1093RNF14FAC475K Datasheet

Current PartRFQ

CMF55475K00BEEB

Vishay DaleIn Stock: 1161CMF55475K00BEEB Datasheet

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CMF55475K00FHEB

Vishay DaleIn Stock: 6063CMF55475K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FAC475K are qualified based on the following criteria:

Primary Compatibility Requirements:

• Identical resistance value: 475 kOhms
• Tolerance equal to or better than ±1%
• Axial package configuration
• Metal film composition
• Flame retardant coating and safety features
• ROHS3 compliance

Allowable Parameter Variations:

• Power rating may be equal to or greater than 0.25W
• Operating temperature range may be equal to or exceed -55°C to 155°C
• Temperature coefficient may be equal to or better (lower absolute value)

Both substitute parts meet these criteria while offering enhanced specifications in power rating (0.5W vs. 0.25W), improved temperature coefficient (±25ppm/°C or ±50ppm/°C), and extended upper operating temperature (175°C vs. 155°C).

Parameter Comparison

Engineering Selection Recommendations

Both CMF55475K00FHEB and CMF55475K00BEEB are qualified substitutes for the RNF14FAC475K. Selection between alternatives depends on application requirements:

CMF55475K00FHEB (Vishay Dale): Maintains ±1% tolerance matching the original specification while providing doubled power rating (0.5W) and extended operating temperature to 175°C. Suitable for applications requiring direct tolerance equivalence with enhanced thermal headroom.

CMF55475K00BEEB (Vishay Dale): Offers superior tolerance (±0.1%), doubled power rating (0.5W), improved temperature coefficient (±25ppm/°C), and extended operating temperature to 175°C. Appropriate for precision applications demanding tighter tolerance control and improved temperature stability.

All substitute parts maintain ROHS3 compliance, axial package configuration, metal film construction, and flame retardant safety features. Physical dimensions are comparable with negligible variation. Moisture-resistant construction in substitute parts provides additional environmental protection beyond the original specification.

Frequently Asked Questions (FAQ)

Q: Can CMF55475K00FHEB directly replace RNF14FAC475K in existing designs?

A: Yes. Both parts share identical resistance value (475 kOhms), tolerance (±1%), axial package configuration, and metal film composition. The substitute provides higher power rating (0.5W vs. 0.25W) and extended operating temperature range (-55°C to 175°C vs. -55°C to 155°C), making it functionally compatible for direct substitution.

Q: What is the primary difference between the two substitute options?

A: CMF55475K00BEEB provides tighter tolerance (±0.1% vs. ±1%) and superior temperature coefficient (±25ppm/°C vs. ±50ppm/°C). Both offer identical power rating (0.5W) and operating temperature range. Selection depends on whether precision tolerance is required for the application.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Substitute parts have slightly smaller dimensions (0.090" Dia x 0.240" L vs. 0.093" Dia x 0.250" L). This minor reduction is mechanically compatible with standard axial resistor footprints and does not require PCB redesign.

Q: Do substitute parts maintain the same safety and compliance certifications?

A: Yes. All parts are ROHS3 compliant with flame retardant coating and safety construction. Substitute parts additionally feature moisture-resistant construction, providing equivalent or enhanced environmental protection.

Q: Can the higher power rating of substitute parts cause issues in the circuit?

A: No. Higher power rating indicates greater thermal capacity and does not negatively affect circuit operation. The component will operate within its rated specifications when used in applications designed for 0.25W or higher power dissipation.