RNF14FAD2K21 Equivalent & Substitute Parts

Part Overview

The RNF14FAD2K21 is a 2.21 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) in axial package configuration, manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety-rated construction with operating temperature range from -55°C to 155°C. The part is currently active in production with RoHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across different packaging formats or when upgraded specifications provide enhanced performance margins for demanding applications.

Substiute Parts

RNF14FAD2K21

Stackpole Electronics IncIn Stock: 904RNF14FAD2K21 Datasheet

Current PartRFQ

RNF14FTD2K21

Stackpole Electronics IncIn Stock: 54848RNF14FTD2K21 Datasheet

DirectRFQ

CMF552K2100DHR6

Vishay DaleIn Stock: 1886CMF552K2100DHR6 Datasheet

UpgradeRFQ

CMF552K2100FHEB

Vishay DaleIn Stock: 15758CMF552K2100FHEB Datasheet

UpgradeRFQ

CPF12K2100FKEE6

Vishay DaleIn Stock: 2099CPF12K2100FKEE6 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by three critical parameters: resistance value (2.21 kOhms), tolerance (±1% or tighter), and axial package configuration. All identified substitutes maintain the same resistance value and tolerance specification. Packaging format variations (Tape & Box versus Cut Tape) represent direct equivalents with identical electrical characteristics. Power rating upgrades (0.5W or 1W) and improved tolerance specifications (±0.5%) are classified as upgrades that provide enhanced performance margins while maintaining backward compatibility in circuit applications. Temperature coefficient and operating temperature range variations are noted but do not preclude substitution when the application requirements fall within the substitute part's specified limits.

Parameter Comparison

Engineering Selection Recommendations

RNF14FTD2K21 serves as the direct equivalent substitute, offering identical electrical specifications with the same manufacturer (Stackpole Electronics Inc) and RoHS3 compliance. This part differs only in packaging format (Cut Tape versus Tape & Box), making it suitable for applications where tape reel format is preferred for automated assembly processes.

CMF552K2100FHEB represents an upgrade option maintaining RoHS3 compliance with improved tolerance (±1%), enhanced power rating (0.5W), and extended operating temperature range (-55°C to 175°C). This Vishay Dale part is recommended for applications requiring higher thermal margins or moisture-resistant construction.

CMF552K2100DHR6 provides the highest tolerance specification (±0.5%) and power rating (0.5W) with extended temperature range, but carries RoHS non-compliant status. Selection of this part requires verification that RoHS compliance is not mandated by application or regulatory requirements.

CPF12K2100FKEE6 offers the maximum power rating (1W) and widest operating temperature range (-65°C to 230°C) with flame proof construction and RoHS3 compliance. This part is suitable for high-temperature or high-dissipation applications where the enhanced thermal capability provides design margin.

Frequently Asked Questions (FAQ)

Q: Can RNF14FAD2K21 be replaced with RNF14FTD2K21? A: Yes. Both parts are manufactured by Stackpole Electronics Inc with identical electrical specifications (2.21 kOhms ±1%, 0.25W, metal film, axial package). The only difference is packaging format (Tape & Box versus Cut Tape). Selection depends on assembly process requirements.

Q: What is the difference between direct equivalents and upgrade substitutes? A: Direct equivalents (RNF14FTD2K21) maintain identical electrical and thermal specifications with only packaging format differences. Upgrade substitutes (CMF552K2100FHEB, CMF552K2100DHR6, CPF12K2100FKEE6) provide enhanced performance through higher power ratings, improved tolerance, or extended temperature ranges while maintaining the same resistance value and axial package configuration.

Q: Are the Vishay Dale parts (CMF and CPF series) compatible with the original Stackpole part? A: Yes, from an electrical standpoint. All parts share the same 2.21 kOhms resistance value, ±1% tolerance (or better), metal film composition, and axial package. However, CMF552K2100DHR6 is RoHS non-compliant, which may restrict its use in regulated applications. CMF552K2100FHEB and CPF12K2100FKEE6 maintain RoHS3 compliance.

Q: Which substitute should I use for high-temperature applications? A: CPF12K2100FKEE6 supports the widest operating temperature range (-65°C to 230°C) and is recommended for applications exceeding the original part's 155°C maximum. CMF552K2100FHEB and CMF552K2100DHR6 extend the upper limit to 175°C.

Q: Does packaging format affect circuit performance? A: No. Tape & Box (RNF14FAD2K21) and Cut Tape (RNF14FTD2K21) formats contain identical components and deliver equivalent electrical performance. Format selection is driven by assembly automation requirements and inventory management practices.

Q: Can I use a higher power-rated resistor as a substitute? A: Yes. A 0.5W or 1W resistor can replace a 0.25W part in the same circuit without electrical performance degradation. Higher power ratings provide thermal margin and may improve reliability in applications with elevated ambient temperatures or marginal thermal design.

Q: What compliance certifications should I verify before substitution? A: Verify RoHS compliance status against your application requirements. RNF14FAD2K21, RNF14FTD2K21, CMF552K2100FHEB, and CPF12K2100FKEE6 are RoHS3 compliant. CMF552K2100DHR6 is RoHS non-compliant. All parts are REACH unaffected or affected as specified in the parameter comparison table.