PRNF14FTD3K40 Equivalent & Substitute Parts

Part Overview

The PRNF14FTD3K40 is a 3.4 kOhms ±1% 0.25W through-hole resistor manufactured by Stackpole Electronics Inc in the RNF series. This metal film axial resistor features flame retardant coating and safety construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic assemblies where environmental and regulatory compliance is required.

Substiute Parts

PRNF14FTD3K40

Stackpole Electronics IncIn Stock: 871PRNF14FTD3K40 Datasheet

Current PartRFQ

RNF14FTD3K40

Stackpole Electronics IncIn Stock: 25404RNF14FTD3K40 Datasheet

DirectRFQ

CMF553K4000FHEB

Vishay DaleIn Stock: 4197CMF553K4000FHEB Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PRNF14FTD3K40 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Resistance value: 3.4 kOhms
• Tolerance: ±1%
• Composition: Metal Film
• Package configuration: Axial through-hole
• Compliance: ROHS3 Compliant

Allowable Variations:

• Power rating may be equal or higher (0.25W or greater)
• Operating temperature range may be equal or extended
• Temperature coefficient may be equal or lower (tighter specification)
• Physical dimensions may vary within standard axial resistor tolerances
• Packaging format (Tape & Reel or Cut Tape) does not affect electrical equivalence

The PRNF14FTD3K40 in Tape & Reel packaging is directly equivalent to the same part number in Cut Tape packaging. The CMF553K4000FHEB represents an upgrade substitute with higher power rating and improved temperature characteristics.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Packaging Format): The RNF14FTD3K40 in Cut Tape packaging is electrically and mechanically identical to the PRNF14FTD3K40 in Tape & Reel packaging. Selection between these two depends solely on procurement and assembly requirements. Both maintain active product status and full ROHS3 compliance.

Upgrade Substitute (Higher Performance): The CMF553K4000FHEB from Vishay Dale provides enhanced specifications suitable for applications requiring improved thermal stability or higher power dissipation capability. This substitute offers a lower temperature coefficient (±50ppm/°C versus ±100ppm/°C) and extended operating temperature range (-55°C to 175°C versus -55°C to 155°C). The higher power rating (0.5W versus 0.25W) accommodates designs with greater thermal margin. Physical dimensions are comparable within standard axial resistor tolerances. All parts maintain ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the RNF14FTD3K40 (Cut Tape) be used as a direct replacement for the PRNF14FTD3K40 (Tape & Reel)?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format only. Tape & Reel is used for automated assembly processes, while Cut Tape is used for manual assembly or lower-volume applications. The choice depends on your assembly method and procurement workflow.

Q: Is the CMF553K4000FHEB a suitable substitute for the PRNF14FTD3K40?

A: Yes. The CMF553K4000FHEB meets all critical substitution criteria: identical resistance value (3.4 kOhms), tolerance (±1%), composition (metal film), and package type (axial). It provides upgraded performance with higher power rating (0.5W), lower temperature coefficient (±50ppm/°C), and extended operating temperature range. Physical dimensions are comparable. Use this substitute when your application requires improved thermal performance or higher power dissipation capability.

Q: What are the key parameters that determine if a part can substitute for the PRNF14FTD3K40?

A: The critical parameters are: resistance value (3.4 kOhms), tolerance (±1%), metal film composition, and axial package configuration. Power rating may be equal or higher. Operating temperature range may be equal or extended. Temperature coefficient may be equal or lower. All substitutes must maintain ROHS3 compliance.

Q: Are there any physical dimension concerns when using the CMF553K4000FHEB as a substitute?

A: The CMF553K4000FHEB has slightly smaller dimensions (0.090" Dia x 0.240" L) compared to the PRNF14FTD3K40 (0.093" Dia x 0.250" L). These differences are within standard axial resistor tolerances and do not affect PCB layout compatibility or mechanical fit in standard through-hole applications.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. All listed substitutes are ROHS3 compliant and REACH unaffected, matching the compliance status of the PRNF14FTD3K40. This ensures compatibility with modern electronic assembly standards and regulatory requirements.