RC5025F4221CS Equivalent & Substitute Parts Reference

Part Overview

The RC5025F4221CS is a 4.22 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 2010 (5025 Metric) package format. This component is rated for 0.667W (2/3W) power dissipation with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts become necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements permit higher power ratings or automotive-grade certifications. The substitute parts listed maintain electrical equivalence while offering alternative sourcing options and enhanced feature sets.

Substiute Parts

RC5025F4221CS

Samsung Electro-MechanicsIn Stock: 1129RC5025F4221CS Datasheet

Current PartRFQ

CRCW20104K22FKEF

Vishay DaleIn Stock: 5033CRCW20104K22FKEF Datasheet

SimilarRFQ

ERJ-12SF4221U

Panasonic Electronic ComponentsIn Stock: 6507ERJ-12SF4221U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC5025F4221CS is based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Resistance value must equal 4.22 kOhms
• Tolerance must be ±1% or tighter
• Package must be 2010 (5025 Metric)
• Composition must be thick film
• Temperature coefficient must be ±100ppm/°C
• Operating temperature range must encompass -55°C to 155°C
• RoHS3 compliance required

Secondary Substitution Allowances:

• Power rating may exceed 0.667W (higher ratings provide design margin)
• Packaging format may differ (Tape & Reel acceptable for equivalent loose component)
• Additional certifications (AEC-Q200) are permissible enhancements
• Product status may vary (Active preferred; Not For New Designs acceptable for legacy applications)

The two substitute parts listed (CRCW20104K22FKEF and ERJ-12SF4221U) meet all primary criteria and exceed the power rating specification, providing enhanced thermal performance and automotive-grade reliability options.

Parameter Comparison

Engineering Selection Recommendations

CRCW20104K22FKEF (Vishay Dale) - Primary Substitute

This part is the preferred substitute for new designs and ongoing production. It maintains Active product status, meets all electrical and mechanical parameters, and provides a 0.083W power margin (0.75W vs. 0.667W). The AEC-Q200 automotive certification adds reliability assurance for demanding applications. Slightly increased seated height (0.028" vs. 0.026") remains within typical PCB design tolerances for 2010 package components.

ERJ-12SF4221U (Panasonic Electronic Components) - Secondary Substitute

This part is electrically and mechanically equivalent but carries "Not For New Designs" product status. It remains suitable for legacy system maintenance, field replacements, and applications where existing inventory must be maintained. The AEC-Q200 certification and identical electrical specifications ensure functional compatibility. Use this part only when CRCW20104K22FKEF is unavailable or when supporting existing production lines.

Selection Logic:

• For new designs: Select CRCW20104K22FKEF
• For legacy support: ERJ-12SF4221U is acceptable
• Both substitutes provide enhanced power handling and automotive-grade reliability
• All three parts share identical resistance, tolerance, temperature coefficient, and operating range

Frequently Asked Questions (FAQ)

Q: Can CRCW20104K22FKEF replace RC5025F4221CS directly on the PCB?

A: Yes. Both parts use the 2010 (5025 Metric) package with identical length and width (5.00mm x 2.50mm). The seated height difference (0.028" vs. 0.026") is within standard PCB design tolerances and does not affect placement or soldering.

Q: What is the significance of the higher power rating (0.75W vs. 0.667W) in the substitute parts?

A: The higher power rating provides additional thermal margin and indicates enhanced current-handling capability. This is a beneficial characteristic that does not compromise circuit function. The substitute parts can safely operate in any application designed for the original 0.667W specification.

Q: Are the substitute parts RoHS3 compliant?

A: Yes. Both CRCW20104K22FKEF and ERJ-12SF4221U carry ROHS3 Compliant status, matching the original RC5025F4221CS. All three parts are suitable for applications with RoHS regulatory requirements.

Q: What does "Not For New Designs" mean for ERJ-12SF4221U?

A: This designation indicates that Panasonic has transitioned this part to end-of-life status and does not recommend it for new product development. However, the part remains functionally equivalent and is suitable for maintaining existing systems or providing field replacements where inventory exists.

Q: Do the substitute parts have the same moisture sensitivity level?

A: Yes. All three parts carry MSL 1 (Unlimited) rating, indicating identical moisture handling characteristics and storage requirements. No special precautions are needed when substituting between these parts.

Q: Can I use ERJ-12SF4221U if CRCW20104K22FKEF is unavailable?

A: Yes, for applications where product status is not a constraint. ERJ-12SF4221U meets all electrical and mechanical specifications. However, for new designs, CRCW20104K22FKEF is the recommended choice due to its Active product status.

Q: Are there any temperature performance differences between these parts?

A: No. All three parts share identical temperature coefficient (±100ppm/°C) and operating range (-55°C to 155°C). Temperature stability and performance are equivalent across all substitutes.

Q: What is the difference between the packaging formats (loose vs. Tape & Reel)?

A: The original RC5025F4221CS uses standard packaging, while CRCW20104K22FKEF and ERJ-12SF4221U are supplied in Tape & Reel format. This affects bulk handling and automated assembly but does not impact the electrical or mechanical properties of individual components.