RT0402FRE0721RL Equivalent & Substitute Parts

Part Overview

The RT0402FRE0721RL is a 21 Ohm ±1% thin film chip resistor in 0402 (1005 Metric) package manufactured by YAGEO. This surface mount resistor is rated for 0.063W (1/16W) power dissipation with an operating temperature range of -55°C to 155°C. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified for applications requiring alternative tolerance specifications, enhanced power ratings, or automotive-grade qualifications while maintaining the same resistance value and package footprint.

Substiute Parts

RT0402FRE0721RL

YAGEOIn Stock: 947RT0402FRE0721RL Datasheet

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CPF0402B21RE1

TE Connectivity Passive ProductIn Stock: 1013CPF0402B21RE1 Datasheet

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RNCF0402DTE21R0

Stackpole Electronics IncIn Stock: 10063RNCF0402DTE21R0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT0402FRE0721RL is determined by strict equivalence in the following parameters: resistance value (21 Ohms), package type (0402/1005 Metric), composition (thin film), and operating temperature range (-55°C to 155°C). Substitute parts must maintain these core specifications to ensure mechanical and electrical compatibility in the same circuit footprint.

The identified substitute parts differ in the following allowed parameters:

• Tolerance: Tighter tolerance specifications (±0.1% or ±0.5%) represent upgrades that maintain backward compatibility
• Power Rating: Higher power ratings (0.1W) provide enhanced thermal capability while remaining compatible with 0.063W applications
• Temperature Coefficient: Lower temperature coefficients (±25ppm/°C) indicate improved stability
• Automotive Qualification: AEC-Q200 certification indicates suitability for automotive applications without affecting general-purpose compatibility

Parameter Comparison

Engineering Selection Recommendations

CPF0402B21RE1 (TE Connectivity Passive Product) is suitable for applications requiring tighter tolerance control. The ±0.1% tolerance and ±25ppm/°C temperature coefficient provide improved precision compared to the original RT0402FRE0721RL. This part maintains identical power rating and package specifications, ensuring direct compatibility. ROHS3 compliance and MSL 1 rating match the original part requirements.

RNCF0402DTE21R0 (Stackpole Electronics Inc) is suitable for applications requiring enhanced thermal performance or automotive-grade reliability. The 0.1W power rating provides 58% higher power dissipation capability than the original part. AEC-Q200 automotive qualification indicates suitability for automotive applications. The ±0.5% tolerance and ±25ppm/°C temperature coefficient represent a balance between precision and cost. ROHS3 compliance and MSL 1 rating match the original part requirements.

Both substitute parts maintain the 0402 package footprint and thin film composition, ensuring mechanical and electrical compatibility in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can CPF0402B21RE1 be used as a direct replacement for RT0402FRE0721RL?

A: Yes. Both parts share identical resistance (21 Ohms), package (0402), power rating (0.063W), and operating temperature range (-55°C to 155°C). The CPF0402B21RE1 features tighter tolerance (±0.1% vs ±1%) and lower temperature coefficient (±25ppm/°C vs ±50ppm/°C), making it a compatible upgrade for precision-sensitive applications.

Q: Can RNCF0402DTE21R0 be used as a direct replacement for RT0402FRE0721RL?

A: Yes. Both parts share identical resistance (21 Ohms), package (0402), and operating temperature range (-55°C to 155°C). The RNCF0402DTE21R0 features higher power rating (0.1W vs 0.063W) and AEC-Q200 automotive qualification. The higher power rating does not affect compatibility in applications designed for 0.063W resistors.

Q: What is the primary difference between the two substitute parts?

A: CPF0402B21RE1 prioritizes tolerance precision (±0.1%) for applications requiring tight resistance control. RNCF0402DTE21R0 prioritizes thermal capability (0.1W power rating) and automotive qualification (AEC-Q200) for applications requiring enhanced reliability or automotive-grade components.

Q: Are all three parts available in the same packaging format?

A: Yes. All three parts are supplied in Tape & Reel (TR) packaging and use the 0402 (1005 Metric) package footprint, ensuring compatibility with standard surface mount assembly processes.

Q: Do all substitute parts meet RoHS and environmental compliance requirements?

A: Yes. All three parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), meeting standard environmental and regulatory requirements for commercial and industrial applications.