PRNF14FTD1M21 Equivalent & Substitute Parts

Part Overview

The PRNF14FTD1M21 is a 1.21 MOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial configuration, manufactured by Stackpole Electronics Inc. This component is classified as Active product status with ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, design optimization, or supply chain considerations.

Substiute Parts

PRNF14FTD1M21

Stackpole Electronics IncIn Stock: 731PRNF14FTD1M21 Datasheet

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CMF551M2100FHEB

Vishay DaleIn Stock: 2562CMF551M2100FHEB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CMF551M2100FHEB qualifies as a substitute based on the following electrical and mechanical parameters:

• Identical resistance value: 1.21 MOhms
• Identical tolerance: ±1%
• Matching composition: Metal Film
• Compatible package: Axial configuration
• Equivalent termination count: 2 terminations
• Compliant certifications: ROHS3, REACH Unaffected, EAR99

The substitute part features a higher power rating (0.5W vs 0.25W) and extended operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C), which provides design margin without compromising electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both PRNF14FTD1M21 and CMF551M2100FHEB maintain Active product status and satisfy ROHS3 and REACH compliance requirements. The CMF551M2100FHEB offers improved thermal stability with a lower temperature coefficient (±50ppm/°C vs ±100ppm/°C) and higher power dissipation capability (0.5W vs 0.25W). Physical dimensions are comparable with minimal variation, supporting direct mechanical substitution in standard PCB layouts. Selection between these parts depends on circuit power dissipation requirements and thermal stability specifications.

Frequently Asked Questions (FAQ)

Q: Can CMF551M2100FHEB replace PRNF14FTD1M21 in all applications?

A: Yes, provided the circuit design does not require the specific thermal or power characteristics of the original part. The substitute maintains identical electrical specifications (resistance, tolerance, composition) and compatible mechanical form factor.

Q: What is the impact of the higher power rating on circuit performance?

A: The 0.5W rating of CMF551M2100FHEB provides additional thermal margin compared to the 0.25W original. This does not alter circuit behavior but reduces component temperature rise under identical power dissipation conditions.

Q: Are there physical installation differences between these parts?

A: Both components use axial package configuration with comparable dimensions (0.093" vs 0.090" diameter, 0.250" vs 0.240" length). Standard PCB footprints designed for axial resistors accommodate both parts without modification.

Q: How do temperature coefficients affect circuit accuracy?

A: The CMF551M2100FHEB exhibits superior temperature stability (±50ppm/°C vs ±100ppm/°C). In precision circuits operating across wide temperature ranges, this characteristic may provide improved resistance value stability.

Q: Are both parts suitable for high-reliability applications?

A: Both components satisfy ROHS3 compliance and REACH requirements. Compliance certifications and Active product status support use in regulated applications. Specific reliability requirements should be evaluated against individual application standards.