RNF14FAD133K Equivalent & Substitute Parts

Part Overview

The RNF14FAD133K is a 133 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, designed for applications requiring precision resistance values with tight tolerance specifications. The part maintains Active product status with 815 units in current inventory. Substitute parts are identified when equivalent electrical performance can be maintained within the allowed parameter ranges for this resistor category, particularly when higher power ratings or improved temperature coefficients are acceptable for the application.

Substiute Parts

RNF14FAD133K

Stackpole Electronics IncIn Stock: 847RNF14FAD133K Datasheet

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CMF55133K00FHEB

Vishay DaleIn Stock: 1951CMF55133K00FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RNF14FAD133K is determined by the following criteria:

Critical Parameters (Must Match):

• Resistance value: 133 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package type: Axial
• Regulatory compliance: ROHS3 Compliant

Allowable Variations:

• Power rating: Equal or higher than 0.25W
• Operating temperature range: Equal or higher upper limit than 155°C
• Temperature coefficient: Equal or lower absolute value than ±100ppm/°C
• Physical dimensions: Minor variations acceptable within axial package constraints

The CMF55133K00FHEB qualifies as a substitute based on these parameters, offering enhanced specifications in power rating (0.5W vs 0.25W) and temperature coefficient (±50ppm/°C vs ±100ppm/°C) while maintaining all critical matching parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the RNF14FAD133K and CMF55133K00FHEB maintain Active product status and full ROHS3 compliance. The CMF55133K00FHEB provides enhanced specifications with doubled power dissipation capability (0.5W vs 0.25W), improved temperature coefficient stability (±50ppm/°C vs ±100ppm/°C), and extended upper operating temperature limit (175°C vs 155°C). Physical dimensions are comparable within axial package tolerances. Selection between these parts depends on application power dissipation requirements and thermal environment specifications. The substitute part offers superior performance margins for demanding applications while maintaining identical electrical characteristics for resistance and tolerance.

Frequently Asked Questions (FAQ)

Q: Can CMF55133K00FHEB replace RNF14FAD133K in all applications?

A: The CMF55133K00FHEB is electrically and mechanically compatible as a direct substitute. The higher power rating (0.5W vs 0.25W) and improved temperature coefficient (±50ppm/°C vs ±100ppm/°C) provide enhanced performance margins. Physical dimensions are comparable within axial package specifications. Compatibility depends on circuit board layout constraints and thermal management requirements.

Q: What are the key differences between these parts?

A: The primary differences are power rating (0.25W vs 0.5W), temperature coefficient (±100ppm/°C vs ±50ppm/°C), maximum operating temperature (155°C vs 175°C), and packaging format (Tape & Box vs Cut Tape). Resistance value, tolerance, composition, and compliance specifications are identical.

Q: Are both parts ROHS3 compliant?

A: Yes, both RNF14FAD133K and CMF55133K00FHEB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: Do the physical dimensions affect PCB layout compatibility?

A: Both parts use axial package construction with comparable dimensions (RNF14FAD133K: 0.093" Dia x 0.250" L; CMF55133K00FHEB: 0.090" Dia x 0.240" L). Minor dimensional variations are within standard axial resistor tolerances and do not typically affect through-hole PCB mounting compatibility.

Q: Which part should be selected for high-temperature applications?

A: The CMF55133K00FHEB supports operation to 175°C compared to 155°C for the RNF14FAD133K, making it suitable for applications requiring extended temperature range operation.