RNF14FTC39R2 Equivalent & Substitute Parts

Part Overview

The RNF14FTC39R2 is a 39.2 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 construction, designed for applications requiring precision resistance in compact form factors. The part maintains Active product status with 795 units in current inventory. Substitute parts are identified to address application requirements including higher power dissipation capability, enhanced moisture resistance, or alternative packaging configurations while maintaining core electrical specifications.

Substiute Parts

RNF14FTC39R2

Stackpole Electronics IncIn Stock: 852RNF14FTC39R2 Datasheet

Current PartRFQ

CMF5539R200FHEB

Vishay DaleIn Stock: 1792CMF5539R200FHEB Datasheet

UpgradeRFQ

CMF5039R200FHEB

Vishay DaleIn Stock: 2207CMF5039R200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC39R2 are qualified based on the following electrical and mechanical parameters:

Core Matching Criteria:

• Resistance value: 39.2 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Package Type: Axial (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Allowable Variations:

• Power Rating: May increase from 0.25W to 0.5W or higher (backward compatible)
• Operating Temperature Range: May extend upper limit beyond 155°C (backward compatible)
• Features: May include additional properties such as Moisture Resistant (backward compatible)
• Physical Dimensions: May vary within axial package constraints
• Packaging Format: May differ (Tape & Reel to Cut Tape conversion acceptable)

Two substitute parts meet these criteria: CMF5039R200FHEB (manufacturer-recommended direct equivalent) and CMF5539R200FHEB (upgraded power rating variant).

Parameter Comparison

Engineering Selection Recommendations

CMF5039R200FHEB (Manufacturer-Recommended Substitute): This part is the direct equivalent from Vishay Dale, matching all core electrical specifications of the RNF14FTC39R2. It maintains identical power rating (0.25W), resistance (39.2 Ohms), and tolerance (±1%). The extended operating temperature range (-55°C ~ 175°C) provides additional thermal margin. Moisture-resistant construction enhances reliability in humid environments. Physical dimensions are smaller, which may require PCB layout verification. ROHS3 compliance and REACH unaffected status maintain regulatory alignment. This part is suitable for direct substitution in applications where the original specification is maintained.

CMF5539R200FHEB (Upgraded Power Rating Variant): This part provides identical electrical specifications with increased power dissipation capability (0.5W versus 0.25W). The higher power rating enables use in applications with greater thermal stress or margin requirements. Extended operating temperature range (-55°C ~ 175°C) and moisture-resistant features match the manufacturer-recommended substitute. Physical dimensions differ slightly from the main part. ROHS3 compliance and REACH unaffected status are maintained. This part is suitable for applications requiring enhanced power handling while preserving all other electrical characteristics.

Both substitute parts carry Active product status with adequate inventory availability (2143 units for CMF5039R200FHEB; 1714 units for CMF5539R200FHEB).

Frequently Asked Questions (FAQ)

Q: Can CMF5039R200FHEB replace RNF14FTC39R2 in all applications? A: Yes. CMF5039R200FHEB matches all core electrical parameters: 39.2 Ohms ±1%, 0.25W power rating, metal film composition, ±50ppm/°C temperature coefficient, and axial package type. The smaller physical dimensions require verification that PCB footprint spacing accommodates the reduced size (0.065" Dia x 0.150" L versus 0.093" Dia x 0.250" L).

Q: When should CMF5539R200FHEB be selected instead of CMF5039R200FHEB? A: Select CMF5539R200FHEB when the application requires higher power dissipation capability (0.5W versus 0.25W) or when thermal margin is a design consideration. All other electrical specifications remain identical. Physical dimensions are slightly larger (0.090" Dia x 0.240" L), requiring PCB layout verification.

Q: Are there packaging format differences between these parts? A: Yes. RNF14FTC39R2 is supplied in Tape & Reel (TR) format. Both substitute parts (CMF5039R200FHEB and CMF5539R200FHEB) are supplied in Cut Tape (CT) format. This affects handling and assembly processes but does not impact electrical performance or component functionality.

Q: Do the substitute parts maintain regulatory compliance? A: Yes. Both CMF5039R200FHEB and CMF5539R200FHEB are ROHS3 compliant and REACH unaffected, matching the compliance status of RNF14FTC39R2.

Q: What is the significance of the extended operating temperature range in substitute parts? A: Substitute parts operate from -55°C ~ 175°C compared to the main part's -55°C ~ 155°C range. This provides an additional 20°C upper temperature margin, beneficial for applications in elevated thermal environments. The extended range does not affect performance within the original specification range.

Q: Are the substitute parts moisture resistant? A: Yes. Both CMF5039R200FHEB and CMF5539R200FHEB include moisture-resistant construction, compared to the main part which specifies flame retardant coating and safety features. This enhancement improves reliability in humid or corrosive environments without affecting electrical performance.