RNF14FAC42K2 Equivalent & Substitute Parts

Part Overview

The RNF14FAC42K2 is a 42.2 kOhms ±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 values with reliable performance across industrial temperature ranges. The part is currently active in production with 942 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization when the primary part becomes unavailable or when application requirements necessitate alternative specifications.

Substiute Parts

RNF14FAC42K2

Stackpole Electronics IncIn Stock: 1012RNF14FAC42K2 Datasheet

Current PartRFQ

CMF5542K200FHEB

Vishay DaleIn Stock: 2448CMF5542K200FHEB Datasheet

UpgradeRFQ

CMF5042K200FHEB

Vishay DaleIn Stock: 1432CMF5042K200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FAC42K2 are qualified based on the following critical parameters that determine functional equivalence:

Mandatory Matching Parameters:

• Resistance value: 42.2 kOhms (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)
• RoHS compliance: ROHS3 Compliant (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: May vary within axial package constraints
• Packaging format: May differ (Tape & Box vs. Cut Tape)
• Manufacturer: Alternative qualified manufacturers permitted

The identified substitutes CMF5542K200FHEB and CMF5042K200FHEB meet all mandatory matching criteria. CMF5542K200FHEB provides upgraded power handling at 0.5W (1/2W) with extended operating temperature to 175°C. CMF5042K200FHEB maintains identical power rating and specifications while offering improved moisture resistance and extended temperature range.

Parameter Comparison

Engineering Selection Recommendations

CMF5042K200FHEB (Manufacturer Recommended Substitute): This part is the direct equivalent to RNF14FAC42K2 with identical electrical specifications and power rating. It maintains ROHS3 compliance and adds moisture resistance features. The extended operating temperature range to 175°C provides additional thermal margin. Smaller physical dimensions (0.065" Dia x 0.150" L) may require PCB layout verification for existing designs. This substitute is suitable for direct replacement in applications where the original part is unavailable.

CMF5542K200FHEB (Upgrade Substitute): This part provides enhanced power handling at 0.5W (1/2W) while maintaining all other electrical parameters. It is ROHS3 compliant with moisture resistance and extended temperature range to 175°C. The increased power rating allows operation in higher dissipation environments. Slightly larger physical dimensions (0.090" Dia x 0.240" L) require PCB footprint compatibility verification. This substitute is appropriate for applications requiring thermal margin or higher power dissipation capability.

Both substitutes maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can CMF5542K200FHEB be used as a direct replacement for RNF14FAC42K2? A: Yes. CMF5542K200FHEB meets all mandatory electrical parameters: 42.2 kOhms resistance, ±1% tolerance, metal film composition, ±50ppm/°C temperature coefficient, and ROHS3 compliance. The higher power rating (0.5W vs. 0.25W) is a non-limiting upgrade. Physical dimensions differ slightly; PCB layout compatibility must be confirmed.

Q: What is the difference between CMF5542K200FHEB and CMF5042K200FHEB? A: Both parts are electrically equivalent to RNF14FAC42K2. The primary difference is power rating: CMF5542K200FHEB is rated 0.5W (1/2W), while CMF5042K200FHEB is rated 0.25W (1/4W), matching the original part. CMF5042K200FHEB is the manufacturer-recommended substitute for direct replacement. CMF5542K200FHEB is suitable when higher power dissipation capability is required.

Q: Are the physical dimensions compatible with existing PCB designs? A: RNF14FAC42K2 measures 0.093" Dia x 0.250" L. CMF5542K200FHEB measures 0.090" Dia x 0.240" L (slightly smaller). CMF5042K200FHEB measures 0.065" Dia x 0.150" L (significantly smaller). All are axial package types. PCB footprint compatibility must be verified for each substitute, particularly for CMF5042K200FHEB due to its reduced size.

Q: Do the substitute parts maintain the same compliance certifications? A: Yes. Both CMF5542K200FHEB and CMF5042K200FHEB are ROHS3 compliant, REACH unaffected, and classified as EAR99 ECCN, identical to RNF14FAC42K2.

Q: What is the temperature coefficient specification for substitute parts? A: Both substitute parts maintain ±50ppm/°C temperature coefficient, identical to the main part. CMF5542K200FHEB and CMF5042K200FHEB extend the operating temperature range to -55°C ~ 175°C compared to the main part's -55°C ~ 155°C.

Q: Can these parts be used interchangeably in high-humidity environments? A: Both substitute parts include moisture-resistant features, providing enhanced performance in high-humidity applications compared to the main part. All three parts are suitable for industrial environments; specific application requirements should determine final selection.