RC3225F6491CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225F6491CS is a 6.49 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 a moisture-resistant design and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with 966 units currently in stock.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category. Substitution becomes necessary due to inventory availability, supply chain optimization, or design flexibility requirements while maintaining functional equivalence.

Substiute Parts

RC3225F6491CS

Samsung Electro-MechanicsIn Stock: 1035RC3225F6491CS Datasheet

Current PartRFQ

CRCW12106K49FKEA

Vishay DaleIn Stock: 3858CRCW12106K49FKEA Datasheet

SimilarRFQ

ERJ-14NF6491U

Panasonic Electronic ComponentsIn Stock: 15611ERJ-14NF6491U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC3225F6491CS are qualified based on the following substitution criteria:

Mandatory Matching Parameters:

• Resistance value: 6.49 kOhms
• Tolerance: ±1%
• Package format: 1210 (3225 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS compliance: ROHS3 Compliant

Allowable Variation:

• Power rating: Substitute parts may exceed the 0.333W specification of the main part, provided the package dimensions remain compatible with 1210 form factor constraints

The identified substitute parts maintain electrical equivalence through identical resistance, tolerance, and temperature characteristics. All substitutes are qualified for the same operating environment and comply with equivalent regulatory standards.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CRCW12106K49FKEA (Vishay Dale)

The CRCW12106K49FKEA maintains Active product status and provides full electrical equivalence to the RC3225F6491CS. The increased power rating of 0.5W (1/2W) versus 0.333W (1/3W) offers enhanced thermal margin without compromising package compatibility. This part is qualified to AEC-Q200 automotive standards and is available in Tape & Reel packaging format. Inventory availability is substantial at 3763 units.

Secondary Substitute: ERJ-14NF6491U (Panasonic Electronic Components)

The ERJ-14NF6491U provides electrical equivalence with identical resistance, tolerance, and temperature characteristics. However, this part carries a "Not For New Designs" product status designation. The ERJ-14NF6491U is qualified to AEC-Q200 automotive standards and maintains the same operating temperature range and compliance certifications. This part should be considered only when inventory constraints or existing design requirements necessitate its use. Inventory availability is high at 15503 units.

Selection Criteria:

For new designs and applications requiring long-term supply assurance, the CRCW12106K49FKEA is the preferred substitute due to its Active product status. For existing designs or applications where the Panasonic part is already qualified, the ERJ-14NF6491U remains functionally equivalent. Both substitutes are suitable for applications where the increased power rating does not create thermal or space constraints.

Frequently Asked Questions (FAQ)

Q: Can the CRCW12106K49FKEA replace the RC3225F6491CS in existing designs?

A: Yes. The CRCW12106K49FKEA is electrically equivalent with identical resistance (6.49 kOhms), tolerance (±1%), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). The increased power rating (0.5W versus 0.333W) is compatible with the 1210 package form factor and does not create mechanical or thermal conflicts in standard PCB layouts.

Q: What is the difference between the RC3225F6491CS and ERJ-14NF6491U?

A: Both parts are electrically identical with 6.49 kOhms ±1% resistance and ±100ppm/°C temperature coefficient. The primary difference is product status: the RC3225F6491CS is Active, while the ERJ-14NF6491U is designated "Not For New Designs." The ERJ-14NF6491U has a slightly higher maximum seated height (0.028" versus 0.026"), which may affect designs with tight vertical clearance constraints.

Q: Are all three parts RoHS compliant?

A: Yes. The RC3225F6491CS, CRCW12106K49FKEA, and ERJ-14NF6491U are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are REACH Unaffected and classified under ECCN EAR99.

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

A: AEC-Q200 is an automotive industry qualification standard. Both the CRCW12106K49FKEA and ERJ-14NF6491U carry this qualification, indicating suitability for automotive applications. The RC3225F6491CS does not list this qualification but maintains equivalent electrical and environmental specifications.

Q: Can I use these parts interchangeably in high-temperature applications?

A: Yes. All three parts operate across the identical temperature range of -55°C to 155°C with the same temperature coefficient of ±100ppm/°C. Substitution does not affect temperature performance characteristics.

Q: What packaging formats are available?

A: The RC3225F6491CS is supplied in bulk packaging. The CRCW12106K49FKEA and ERJ-14NF6491U are supplied in Tape & Reel (TR) format, which is standard for automated assembly processes.