RC3225F28R7CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225F28R7CS is a 28.7 Ohm ±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 and is ROHS3 compliant with MSL 1 rating.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, temperature coefficient) and mechanical compatibility (package size, termination count) while considering variations in power rating and application-specific certifications.

Substiute Parts

RC3225F28R7CS

Samsung Electro-MechanicsIn Stock: 1047RC3225F28R7CS Datasheet

Current PartRFQ

CRCW121028R7FKEA

Vishay DaleIn Stock: 3050CRCW121028R7FKEA Datasheet

SimilarRFQ

ERJ-14NF28R7U

Panasonic Electronic ComponentsIn Stock: 8462ERJ-14NF28R7U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F28R7CS is determined by the following mandatory parameters:

Electrical Compatibility Requirements:

• Resistance value: 28.7 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 155°C (minimum requirement)

Mechanical Compatibility Requirements:

• Package / Case: 1210 (3225 Metric) (exact match required)
• Number of Terminations: 2 (exact match required)
• Composition: Thick Film (exact match required)

Allowable Variations:

• Power Rating: Substitute parts may have equal or higher power ratings (0.333W or greater)
• Physical Dimensions: Minor variations within package specification tolerance
• Application Certifications: Automotive AEC-Q200 certification is an additional feature, not a substitution barrier

The identified substitute parts meet all mandatory electrical and mechanical parameters while offering enhanced power ratings or automotive-grade certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CRCW121028R7FKEA (Vishay Dale)

The CRCW121028R7FKEA is the preferred substitute for the RC3225F28R7CS. This part maintains identical electrical specifications (28.7 Ohms ±1%, ±100ppm/°C) and mechanical compatibility (1210 package, 2 terminations). The power rating is increased to 0.5W, providing enhanced thermal margin in the same package footprint. The part carries Active product status and ROHS3 compliance. Automotive AEC-Q200 certification qualifies this component for automotive applications where the original part may not be specified.

Secondary Substitute: ERJ-14NF28R7U (Panasonic Electronic Components)

The ERJ-14NF28R7U meets all mandatory electrical and mechanical parameters with identical resistance, tolerance, and temperature coefficient specifications. Power rating is 0.5W, matching the Vishay Dale alternative. This part carries Automotive AEC-Q200 certification. However, the product status is listed as "Not For New Designs," indicating this part is in mature or end-of-life phase. Selection of this part should be limited to legacy design support or replacement applications where existing inventory or design documentation specifies this manufacturer.

Selection Criteria:

For new designs, select CRCW121028R7FKEA. For applications requiring automotive qualification, both CRCW121028R7FKEA and ERJ-14NF28R7U provide AEC-Q200 certification. For legacy or replacement applications, ERJ-14NF28R7U remains functionally compatible despite its "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can CRCW121028R7FKEA directly replace RC3225F28R7CS in existing designs?

A: Yes. Both parts share identical electrical specifications (28.7 Ohms ±1%, ±100ppm/°C temperature coefficient) and mechanical compatibility (1210 package, 2 terminations, thick film composition). The CRCW121028R7FKEA has a higher power rating (0.5W vs. 0.333W), which provides additional thermal margin without affecting circuit performance. PCB layout and footprint remain unchanged.

Q: What is the difference between the 0.333W and 0.5W power ratings?

A: Power rating indicates the maximum continuous power dissipation the resistor can handle at rated temperature without exceeding specified performance limits. The 0.5W rating of substitute parts allows higher current or voltage stress before thermal derating becomes necessary. In applications where the original 0.333W rating is sufficient, the 0.5W substitute provides design margin and improved reliability.

Q: Why is ERJ-14NF28R7U marked "Not For New Designs"?

A: This designation indicates the part is in mature production phase and may have limited long-term availability. Panasonic recommends using this part only for legacy design support or replacement of existing assemblies. For new product development, CRCW121028R7FKEA is the recommended choice.

Q: Are there package or footprint differences between these parts?

A: All three parts use the 1210 (3225 Metric) package. Physical dimensions are within standard package tolerance: RC3225F28R7CS measures 3.20mm × 2.55mm with 0.66mm maximum height; CRCW121028R7FKEA measures 3.20mm × 2.50mm with 0.60mm maximum height; ERJ-14NF28R7U measures 3.20mm × 2.50mm with 0.70mm maximum height. These variations are within standard PCB footprint design tolerance and do not require layout modification.

Q: Do all substitute parts meet RoHS and REACH compliance?

A: Yes. RC3225F28R7CS, CRCW121028R7FKEA, and ERJ-14NF28R7U are all ROHS3 compliant and REACH unaffected. All parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture control is required during storage or handling.

Q: What is the significance of Automotive AEC-Q200 certification on substitute parts?

A: AEC-Q200 is an automotive industry qualification standard for passive components. Parts meeting this standard have undergone additional reliability testing and are approved for automotive applications. The original RC3225F28R7CS does not carry this certification but is specified as moisture resistant. Substitute parts with AEC-Q200 certification are suitable for both general industrial and automotive applications.