RC3225F5491CS Equivalent & Substitute Parts

Part Overview

The RC3225F5491CS is a 5.49 kOhm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 1210 (3225 Metric) package format with 0.333W power rating. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit alternative manufacturers meeting equivalent electrical and mechanical specifications. The RC3225F5491CS has documented substitute availability through Panasonic Electronic Components.

Substiute Parts

RC3225F5491CS

Samsung Electro-MechanicsIn Stock: 964RC3225F5491CS Datasheet

Current PartRFQ

ERJ-14NF5491U

Panasonic Electronic ComponentsIn Stock: 10260ERJ-14NF5491U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F5491CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 5.49 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Package / Case: 1210 (3225 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)

Allowable Variation Parameters:

• Power Rating: Substitute parts may exceed the 0.333W specification, provided the higher power rating does not compromise mechanical fit or thermal characteristics within the 1210 package envelope
• Moisture Sensitivity Level: MSL 1 rating is maintained across all qualified substitutes
• RoHS Compliance: All substitutes maintain ROHS3 compliance status

The ERJ-14NF5491U from Panasonic Electronic Components qualifies as a direct substitute based on matching all mandatory parameters while providing an increased power rating of 0.5W (1/2W), which represents a design margin improvement without introducing incompatibility.

Parameter Comparison

Engineering Selection Recommendations

RC3225F5491CS (Samsung Electro-Mechanics) - Primary Selection

The RC3225F5491CS maintains Active product status with full manufacturing support and 896 units in current inventory. This component is suitable for new designs and ongoing production applications. Samsung Electro-Mechanics classification as Active ensures continued availability and technical support.

ERJ-14NF5491U (Panasonic Electronic Components) - Qualified Substitute

The ERJ-14NF5491U is classified as Not For New Designs but remains available as a substitute for existing designs, legacy system support, or supply chain contingency. This component carries AEC-Q200 automotive qualification, which provides additional reliability assurance beyond standard commercial specifications. The increased power rating (0.5W versus 0.333W) offers design margin without introducing electrical or mechanical incompatibility. Panasonic maintains 10,157 units in inventory, providing substantial supply availability.

Selection Criteria:

• For new designs: RC3225F5491CS is the recommended primary selection due to Active status
• For legacy system maintenance or supply contingency: ERJ-14NF5491U is a qualified substitute with automotive-grade reliability certification
• Both components maintain identical electrical performance at the specified 5.49 kOhm resistance value and ±1% tolerance
• Both components are fully RoHS3 compliant with MSL 1 rating

Frequently Asked Questions (FAQ)

Q: Can ERJ-14NF5491U be used as a direct replacement for RC3225F5491CS in existing designs?

A: Yes. The ERJ-14NF5491U meets all mandatory electrical parameters (5.49 kOhms, ±1% tolerance, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range) and mechanical specifications (1210 package, 3.20mm length, compatible height). The increased power rating (0.5W) does not create incompatibility and provides additional thermal margin.

Q: What is the significance of the "Not For New Designs" status on the ERJ-14NF5491U?

A: This designation indicates that Panasonic has classified this component as suitable for sustaining production and legacy system support but not recommended for new product development. For new designs, the RC3225F5491CS (Active status) is the appropriate selection. The "Not For New Designs" status does not affect the component's electrical or mechanical performance in existing applications.

Q: Are there dimensional differences between these two parts?

A: Minor dimensional variations exist within acceptable tolerances. The RC3225F5491CS measures 0.126" L x 0.100" W (3.20mm x 2.55mm) with maximum seated height of 0.026" (0.66mm). The ERJ-14NF5491U measures 0.126" L x 0.098" W (3.20mm x 2.50mm) with maximum seated height of 0.028" (0.70mm). Both dimensions remain compatible with standard 1210 package footprints and PCB layouts.

Q: Does the AEC-Q200 qualification on the ERJ-14NF5491U provide additional benefits?

A: AEC-Q200 is an automotive industry reliability qualification standard. The ERJ-14NF5491U's AEC-Q200 certification indicates compliance with automotive-grade testing and reliability requirements. This certification is beneficial for applications requiring enhanced reliability assurance but is not mandatory for general commercial or industrial applications.

Q: What is the difference between 1/3W and 1/2W power ratings?

A: The RC3225F5491CS is rated for 0.333W (1/3W) continuous power dissipation, while the ERJ-14NF5491U is rated for 0.5W (1/2W). The higher rating on the substitute part indicates greater thermal capacity. In applications where the original design dissipates less than 0.333W through the resistor, the substitute's higher rating provides additional safety margin without affecting electrical performance.

Q: Are both components RoHS3 compliant?

A: Yes. Both the RC3225F5491CS and ERJ-14NF5491U are ROHS3 compliant, confirming the absence of restricted substances (lead, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and bis(2-ethylhexyl) phthalate) within specified limits.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 (Unlimited) indicates the lowest moisture sensitivity level. Components with this rating do not require moisture-controlled storage or baking procedures prior to soldering. Both the RC3225F5491CS and ERJ-14NF5491U can be stored and handled under standard industrial conditions without special moisture management protocols.