RC3225F4021CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225F4021CS is a 4.02 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 1210 (3225 Metric) package format. This component is rated for 0.333W (1/3W) 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 are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. Alternative sources may be required due to inventory availability, supply chain considerations, or specific application requirements such as automotive qualification.

Substiute Parts

RC3225F4021CS

Samsung Electro-MechanicsIn Stock: 866RC3225F4021CS Datasheet

Current PartRFQ

CRCW12104K02FKEA

Vishay DaleIn Stock: 7593CRCW12104K02FKEA Datasheet

SimilarRFQ

ERJ-14NF4021U

Panasonic Electronic ComponentsIn Stock: 6184ERJ-14NF4021U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F4021CS is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Resistance value: 4.02 kOhms (exact match required)
• Tolerance: ±1% (substitute tolerance must be equal or tighter)
• Package format: 1210 (3225 Metric) (physical and electrical compatibility requirement)
• Composition: Thick Film (performance characteristic consistency)
• Temperature coefficient: ±100ppm/°C (stability requirement)
• Operating temperature range: -55°C to 155°C (minimum coverage required)

Acceptable Variation Parameters:

• Power rating: Substitute parts may exceed 0.333W; higher power ratings provide design margin and are electrically compatible
• Packaging format: Tape & Reel (TR) acceptable for equivalent component sourcing
• Moisture sensitivity level: MSL 1 maintained across all substitutes
• RoHS compliance: ROHS3 maintained across all substitutes

The identified substitute parts meet all mandatory matching criteria while maintaining or exceeding performance specifications.

Parameter Comparison

Engineering Selection Recommendations

CRCW12104K02FKEA (Vishay Dale) - Primary Substitute

This component is the preferred substitute for the RC3225F4021CS. It maintains Active product status with full RoHS3 compliance. The CRCW12104K02FKEA provides identical electrical specifications (4.02 kOhms ±1%, ±100ppm/°C, -55°C to 155°C operating range) with enhanced power rating (0.5W versus 0.333W), offering additional design margin. Automotive AEC-Q200 qualification provides enhanced reliability documentation. Physical dimensions are compatible with PCB layouts designed for the 1210 package format. Inventory availability is substantial (7527 pieces in stock).

ERJ-14NF4021U (Panasonic Electronic Components) - Secondary Substitute

This component meets all electrical and mechanical compatibility requirements with identical resistance, tolerance, temperature coefficient, and operating temperature range. The ERJ-14NF4021U carries Automotive AEC-Q200 qualification and maintains Active RoHS3 compliance. However, this part is designated "Not For New Designs," indicating Panasonic has discontinued active development. This designation restricts its use to legacy system support or where existing supply agreements exist. Physical dimensions remain compatible with 1210 package requirements. Inventory availability is adequate (6168 pieces in stock).

Selection Criteria Summary:

For new designs and active production, CRCW12104K02FKEA is the recommended substitute. For legacy system maintenance where the original RC3225F4021CS is unavailable, ERJ-14NF4021U provides functional equivalence with the understanding that long-term availability may be limited.

Frequently Asked Questions (FAQ)

Q: Can CRCW12104K02FKEA be used as a direct replacement for RC3225F4021CS?

A: Yes. Both components share identical resistance value (4.02 kOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and 1210 package format. The CRCW12104K02FKEA provides higher power rating (0.5W versus 0.333W), which is electrically compatible and provides additional design margin. Physical dimensions are compatible with standard 1210 PCB layouts.

Q: What is the significance of the higher power rating in CRCW12104K02FKEA?

A: The 0.5W rating in CRCW12104K02FKEA exceeds the 0.333W requirement of the RC3225F4021CS. Higher power ratings indicate greater thermal capacity and are fully compatible in applications designed for lower power dissipation. This provides design margin and does not introduce incompatibility.

Q: Why is ERJ-14NF4021U marked "Not For New Designs"?

A: This designation indicates that Panasonic has transitioned this product line and is not actively developing new variants or expanding production capacity. While the component remains functionally equivalent and currently available, it is restricted to legacy applications and existing supply agreements. New designs should utilize CRCW12104K02FKEA or equivalent active-status alternatives.

Q: Are there physical dimension differences that affect PCB layout?

A: Minor dimensional variations exist within acceptable tolerances. RC3225F4021CS measures 0.126" L x 0.100" W (3.20mm x 2.55mm) with 0.026" maximum height. CRCW12104K02FKEA measures 0.126" L x 0.098" W (3.20mm x 2.50mm) with 0.024" maximum height. ERJ-14NF4021U measures 0.126" L x 0.098" W (3.20mm x 2.50mm) with 0.028" maximum height. All variants fit standard 1210 package footprints without layout modification.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. RC3225F4021CS, CRCW12104K02FKEA, and ERJ-14NF4021U are all ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity level. Regulatory and environmental requirements are maintained across all identified substitutes.

Q: What is the difference between Tape & Reel (TR) and other packaging formats?

A: Tape & Reel packaging is the standard format for automated assembly processes. Both substitute parts are supplied in Tape & Reel format, which is compatible with standard pick-and-place equipment. This packaging format does not affect electrical or mechanical performance.

Q: Can these resistors be used in automotive applications?

A: CRCW12104K02FKEA and ERJ-14NF4021U both carry Automotive AEC-Q200 qualification, indicating compliance with automotive reliability and testing standards. RC3225F4021CS does not carry this specific qualification. For automotive applications, CRCW12104K02FKEA is the appropriate selection.