RC3225F5493CS Equivalent & Substitute Parts

Part Overview

The RC3225F5493CS is a 549 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.333W (1/3W) in a 1210 (3225 Metric) package. This component is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified resistance value, tolerance, package dimensions, and operating temperature range. The primary substitute identified is the ERJ-14NF5493U from Panasonic Electronic Components, which maintains the same resistance, tolerance, and package footprint while offering increased power rating and automotive-grade qualification.

Substiute Parts

RC3225F5493CS

Samsung Electro-MechanicsIn Stock: 850RC3225F5493CS Datasheet

Current PartRFQ

ERJ-14NF5493U

Panasonic Electronic ComponentsIn Stock: 8567ERJ-14NF5493U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F5493CS is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Resistance Value: 549 kOhms (exact match required)
• Tolerance: ±1% (equal or tighter tolerance acceptable)
• Package / Case: 1210 (3225 Metric) (identical footprint required)
• Temperature Coefficient: ±100ppm/°C (equal or better stability required)
• Operating Temperature Range: -55°C ~ 155°C (minimum coverage required)
• Composition: Thick Film (technology type must be maintained)
• Number of Terminations: 2 (standard configuration)

Allowable Variation Parameters:

• Power Rating: Substitutes may equal or exceed 0.333W
• Packaging Format: Original packaging (Tape & Reel) may differ from substitute packaging
• Compliance Certifications: Substitutes may include additional certifications (e.g., AEC-Q200, automotive qualification)
• Product Status: Active or Not For New Designs status does not disqualify substitution eligibility

The ERJ-14NF5493U qualifies as a direct substitute because it maintains all mandatory parameters while offering enhanced power rating (0.5W vs. 0.333W) and automotive-grade AEC-Q200 qualification.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (RC3225F5493CS): Select the RC3225F5493CS for new designs and applications requiring RoHS3 compliance. This component is in active production status, ensuring long-term availability and supply chain stability. The RoHS3 compliance status makes it suitable for applications subject to European Union Restriction of Hazardous Substances regulations.

Substitute Selection (ERJ-14NF5493U): The ERJ-14NF5493U may be selected as a substitute when the following conditions are met:

• RoHS compliance is not a requirement for the application
• The application does not restrict use of components marked "Not For New Designs"
• Automotive-grade AEC-Q200 qualification is beneficial or required
• The increased power rating (0.5W vs. 0.333W) provides additional thermal margin

Compliance Considerations: The main part (RC3225F5493CS) maintains RoHS3 compliance, while the substitute (ERJ-14NF5493U) is RoHS non-compliant. Applications subject to RoHS regulations must use the main part or identify alternative substitutes with RoHS compliance status.

Availability and Production Status: The main part is in active production with 828 pieces in stock. The substitute is marked "Not For New Designs," indicating potential future discontinuation. For applications requiring long-term component availability, the main part is the preferred selection.

Frequently Asked Questions (FAQ)

Q: Can the ERJ-14NF5493U be used as a direct replacement for the RC3225F5493CS in existing designs?

A: The ERJ-14NF5493U maintains electrical equivalence (549 kOhms ±1%, ±100ppm/°C, -55°C ~ 155°C operating range) and mechanical compatibility (1210 package footprint). However, the substitute is RoHS non-compliant while the main part is RoHS3 compliant. Substitution is permissible only in applications where RoHS compliance is not required.

Q: What is the significance of the power rating difference (0.333W vs. 0.5W)?

A: The substitute's higher power rating (0.5W) exceeds the main part's specification (0.333W). This represents a design margin improvement and does not create incompatibility. The substitute can safely dissipate the same power levels as the main part while operating at lower junction temperatures.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist within the 1210 package specification. The main part measures 0.126" L x 0.100" W (3.20mm x 2.55mm) with 0.026" maximum seated height. The substitute measures 0.126" L x 0.098" W (3.20mm x 2.50mm) with 0.028" maximum seated height. These variations are within standard 1210 package tolerances and do not affect PCB footprint compatibility.

Q: Why is the substitute marked "Not For New Designs"?

A: The "Not For New Designs" status indicates that Panasonic has designated this component for legacy applications only. New designs should prioritize the RC3225F5493CS (active status) or identify alternative substitutes with active production status to ensure long-term supply chain stability.

Q: What does the ±100ppm/°C temperature coefficient mean for circuit performance?

A: The ±100ppm/°C temperature coefficient specifies that the resistance value will change by a maximum of 100 parts per million for each degree Celsius change in operating temperature. Both the main part and substitute maintain this specification across the -55°C ~ 155°C operating range, ensuring equivalent temperature stability.

Q: Is the MSL 1 (Unlimited) rating the same for both parts?

A: Yes, both the RC3225F5493CS and ERJ-14NF5493U carry MSL 1 (Unlimited) moisture sensitivity level ratings. This indicates that both components do not require special moisture control during storage, handling, or assembly, simplifying supply chain management.

Q: Can these parts be used interchangeably in automotive applications?

A: The substitute (ERJ-14NF5493U) carries AEC-Q200 automotive qualification, making it suitable for automotive applications. The main part (RC3225F5493CS) does not list automotive certification. For automotive applications, the substitute may be preferred if RoHS compliance is not required. For non-automotive applications, either part is acceptable based on compliance requirements.