RNF14DTD2K21 Equivalent & Substitute Parts

Part Overview

The RNF14DTD2K21 is a 2.21 kOhms ±0.5% metal film axial resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This through-hole component features flame retardant coating and safety-grade construction, designed for applications requiring precision resistance values with tight tolerance specifications. The part maintains Active product status with 1071 units in current inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this resistor category.

Substiute Parts

RNF14DTD2K21

Stackpole Electronics IncIn Stock: 1081RNF14DTD2K21 Datasheet

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CMF552K2100DHR6

Vishay DaleIn Stock: 1886CMF552K2100DHR6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14DTD2K21 are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Resistance value: 2.21 kOhms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Composition: Metal Film (exact match required)
• Package: Axial through-hole (exact match required)
• Number of Terminations: 2 (exact match required)

Allowable Variations:

• Power rating: Equal to or greater than 0.25W
• Temperature coefficient: Equal to or lower absolute value
• Operating temperature range: Equal to or exceeding the specified range
• Physical dimensions: Minor variations acceptable within axial package standards
• Compliance certifications: May differ based on manufacturing location and standards

The CMF552K2100DHR6 qualifies as a substitute because it maintains identical resistance, tolerance, composition, and package specifications while offering enhanced power rating (0.5W vs 0.25W), improved temperature coefficient (±50ppm/°C vs ±100ppm/°C), and extended operating temperature range (-55°C ~ 175°C vs -55°C ~ 155°C).

Parameter Comparison

Engineering Selection Recommendations

RNF14DTD2K21 Selection Criteria:

• Applications requiring ROHS3 compliance
• Designs with strict regulatory requirements for RoHS certification
• Circuits where component-level compliance documentation is mandatory
• Standard operating temperature range up to 155°C is sufficient

CMF552K2100DHR6 Selection Criteria:

• Applications where higher power dissipation capability is beneficial (0.5W vs 0.25W)
• Designs requiring improved temperature stability (±50ppm/°C vs ±100ppm/°C)
• Circuits operating at elevated temperatures up to 175°C
• Applications where moisture resistance is a design requirement
• Designs where RoHS3 compliance is not a contractual requirement

Both parts maintain Active product status and are manufactured to metal film axial resistor standards. The primary differentiation factor is RoHS compliance status: the main part is ROHS3 compliant while the substitute is RoHS non-compliant. Selection between these parts depends on regulatory and compliance requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can CMF552K2100DHR6 be used as a direct replacement for RNF14DTD2K21?

A: CMF552K2100DHR6 is electrically and mechanically compatible as a substitute. Both parts share identical resistance (2.21 kOhms), tolerance (±0.5%), composition (metal film), and axial package configuration. The substitute offers superior performance specifications including higher power rating and improved temperature coefficient. However, RoHS compliance status differs; verify compliance requirements for your application before substitution.

Q: What are the physical dimension differences between these parts?

A: RNF14DTD2K21 measures 0.093" diameter x 0.250" length (2.35mm x 6.35mm). CMF552K2100DHR6 measures 0.090" diameter x 0.240" length (2.29mm x 6.10mm). Both are axial package resistors with minor dimensional variations that remain within standard axial resistor package tolerances. PCB layout compatibility should be verified for space-constrained applications.

Q: How do temperature coefficients affect circuit performance?

A: Temperature coefficient indicates resistance value drift per degree Celsius change. RNF14DTD2K21 has ±100ppm/°C while CMF552K2100DHR6 has ±50ppm/°C. Lower temperature coefficient values indicate better stability across temperature variations. For precision analog circuits or wide temperature range applications, the substitute's superior temperature coefficient (±50ppm/°C) provides improved performance.

Q: What is the significance of the power rating difference?

A: RNF14DTD2K21 is rated at 0.25W (1/4W) while CMF552K2100DHR6 is rated at 0.5W (1/2W). Higher power rating indicates greater heat dissipation capability. If circuit analysis shows power dissipation exceeding 0.25W at the 2.21 kOhm resistance value, the substitute's higher rating provides design margin. For applications within 0.25W dissipation, both ratings are acceptable.

Q: Are there packaging format differences?

A: RNF14DTD2K21 is supplied in Tape & Reel (TR) format while CMF552K2100DHR6 is supplied in Cut Tape (CT) format. Both are standard packaging formats for through-hole axial resistors. Tape & Reel is typically used for automated assembly processes, while Cut Tape is suitable for manual assembly or smaller production volumes. Verify your assembly process requirements before selecting based on packaging format.