RNF14FTC39K2 Equivalent & Substitute Parts

Part Overview

The RNF14FTC39K2 is a 39.2 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 tight tolerance specifications. The part is currently active in production with 1147 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

RNF14FTC39K2

Stackpole Electronics IncIn Stock: 1225RNF14FTC39K2 Datasheet

Current PartRFQ

CMF5539K200FHEB

Vishay DaleIn Stock: 6970CMF5539K200FHEB Datasheet

UpgradeRFQ

CMF5039K200FHEB

Vishay DaleIn Stock: 2916CMF5039K200FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC39K2 are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 39.2 kOhms
• Tolerance: ±1%
• Temperature coefficient: ±50ppm/°C
• Composition: Metal Film

Mechanical Parameters (Must Match):

• Package type: Axial through-hole
• Number of terminations: 2

Allowed Variations:

• 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: Cut Tape (CT) or Tape & Reel (TR) acceptable
• Manufacturer: Alternative qualified manufacturers permitted

Compliance Requirements:

• RoHS3 Compliant
• REACH Unaffected status maintained

Two substitute parts meet these criteria: CMF5539K200FHEB (0.5W upgrade) and CMF5039K200FHEB (direct 0.25W equivalent), both manufactured by Vishay Dale.

Parameter Comparison

Engineering Selection Recommendations

CMF5039K200FHEB (Direct Equivalent): This Vishay Dale part provides electrical and mechanical equivalence to the RNF14FTC39K2 with identical power rating (0.25W), resistance (39.2 kOhms), and tolerance (±1%). The extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 155°C) and additional moisture resistance feature provide enhanced reliability margins. Physical dimensions are smaller, which may require PCB layout verification. Both parts maintain ROHS3 compliance and REACH unaffected status. This part is recommended for direct substitution in applications where the original part is unavailable.

CMF5539K200FHEB (Power Upgrade): This Vishay Dale part offers the same electrical specifications as the main part but with doubled power rating (0.5W versus 0.25W). The extended operating temperature range (-55°C ~ 175°C) and moisture resistance features provide additional design margin. Physical dimensions are comparable to the main part. This part is suitable for applications where increased power dissipation capability is beneficial or where thermal margin enhancement is desired. ROHS3 compliance and REACH unaffected status are maintained.

Both substitute parts are active products with established inventory availability and meet all specified compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can CMF5539K200FHEB be used as a direct replacement for RNF14FTC39K2?

A: Yes. Both parts share identical electrical specifications: 39.2 kOhms resistance, ±1% tolerance, ±50ppm/°C temperature coefficient, and metal film composition. The CMF5539K200FHEB has a higher power rating (0.5W versus 0.25W), which does not prevent substitution. Physical dimensions are similar within axial package constraints. Verify PCB layout compatibility before implementation.

Q: What is the difference between CMF5539K200FHEB and CMF5039K200FHEB?

A: Both are Vishay Dale equivalents with identical electrical parameters. The primary difference is power rating: CMF5539K200FHEB is rated at 0.5W (1/2W), while CMF5039K200FHEB is rated at 0.25W (1/4W), matching the original part. CMF5039K200FHEB has smaller physical dimensions (0.065" Dia x 0.150" L versus 0.090" Dia x 0.240" L). Select based on available PCB space and thermal requirements.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both CMF5539K200FHEB and CMF5039K200FHEB are ROHS3 compliant and REACH unaffected, matching the compliance status of the RNF14FTC39K2.

Q: Do the substitute parts have the same operating temperature range?

A: The RNF14FTC39K2 operates from -55°C to 155°C. Both substitute parts extend this range to -55°C to 175°C, providing a 20°C upper temperature margin. This extended range does not prevent substitution and may be beneficial in thermally demanding applications.

Q: What packaging formats are available for the substitute parts?

A: CMF5539K200FHEB and CMF5039K200FHEB are available in Cut Tape (CT) format. The original RNF14FTC39K2 is supplied in Tape & Reel (TR) format. Verify packaging requirements for your procurement and assembly processes.

Q: Are the physical dimensions of substitute parts compatible with the original PCB layout?

A: CMF5539K200FHEB dimensions (0.090" Dia x 0.240" L) are similar to the original (0.093" Dia x 0.250" L) and generally compatible. CMF5039K200FHEB is significantly smaller (0.065" Dia x 0.150" L). Verify hole spacing and component clearances on your PCB before finalizing substitution.