PRNF14FTD40K2 Equivalent & Substitute Parts

Part Overview

The PRNF14FTD40K2 is a 40.2 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component is classified as Active product status and is RoHS3 compliant. Substitute parts may be required due to inventory availability, packaging format preferences, or application-specific performance requirements such as increased power dissipation capability or enhanced temperature stability.

Substiute Parts

PRNF14FTD40K2

Stackpole Electronics IncIn Stock: 1056PRNF14FTD40K2 Datasheet

Current PartRFQ

RNF14FTD40K2

Stackpole Electronics IncIn Stock: 23670RNF14FTD40K2 Datasheet

DirectRFQ

CMF5540K200FHEB

Vishay DaleIn Stock: 1654CMF5540K200FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Resistance Value: Must be 40.2 kOhms
• Tolerance: Must be ±1%
• Composition: Must be Metal Film
• Package Type: Must be Axial
• Compliance: Must maintain RoHS3 compliance

The substitute parts listed below meet these core electrical and mechanical requirements. Variations in power rating, temperature coefficient, and operating temperature range are permitted when the application design accommodates these differences.

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD40K2 (Direct Substitute): This part is functionally identical to the main part PRNF14FTD40K2, differing only in packaging format (Cut Tape versus Tape & Reel). Both are manufactured by Stackpole Electronics Inc, maintain identical electrical specifications, and carry Active product status with ROHS3 compliance. Selection of this substitute is appropriate when Cut Tape packaging is preferred or when Tape & Reel inventory is unavailable.

CMF5540K200FHEB (Upgrade Substitute): This Vishay Dale component maintains the same resistance value and tolerance as the main part but provides enhanced performance characteristics. The 0.5W power rating offers increased thermal headroom compared to the 0.25W rating of the main part. The temperature coefficient of ±50ppm/°C provides superior frequency stability relative to the ±100ppm/°C specification of the main part. The extended operating temperature range to 175°C accommodates higher ambient conditions. This upgrade substitute is suitable for applications requiring improved thermal performance or enhanced temperature stability, provided the circuit design accommodates the slightly different physical dimensions (0.090" Dia x 0.240" L versus 0.093" Dia x 0.250" L).

Frequently Asked Questions (FAQ)

Q: Can RNF14FTD40K2 be used as a direct replacement for PRNF14FTD40K2?

A: Yes. Both parts are identical in electrical specifications and composition. The only difference is packaging format: RNF14FTD40K2 is supplied in Cut Tape (CT) while PRNF14FTD40K2 is supplied in Tape & Reel (TR). Electrical performance and physical dimensions are equivalent.

Q: What are the advantages of using CMF5540K200FHEB instead of PRNF14FTD40K2?

A: The CMF5540K200FHEB offers three technical advantages: doubled power dissipation capability (0.5W versus 0.25W), improved temperature stability (±50ppm/°C versus ±100ppm/°C), and extended maximum operating temperature (175°C versus 155°C). These characteristics are beneficial in high-temperature or high-power-dissipation applications.

Q: Are there any physical dimension differences between these parts?

A: Minor dimensional variations exist. PRNF14FTD40K2 and RNF14FTD40K2 are 0.093" Dia x 0.250" L (2.35mm x 6.35mm). CMF5540K200FHEB is 0.090" Dia x 0.240" L (2.29mm x 6.10mm). These differences are negligible for most through-hole applications but should be verified for space-constrained designs.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. PRNF14FTD40K2, RNF14FTD40K2, and CMF5540K200FHEB are all ROHS3 compliant and REACH unaffected.

Q: Which substitute should be selected for a cost-sensitive application?

A: Selection should be based on availability and packaging requirements rather than cost alone. RNF14FTD40K2 is the direct electrical equivalent and should be the primary choice when available. CMF5540K200FHEB should be selected only when enhanced thermal or stability performance is required by the application design.