RC3225F1581CS Equivalent & Substitute Parts

Part Overview

The RC3225F1581CS is a 1.58 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 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 moisture sensitivity rating.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit alternative manufacturers while maintaining electrical and mechanical compatibility. The RC3225F1581CS has been identified with one direct substitute option that shares the same resistance value, tolerance, package format, and operating temperature range.

Substiute Parts

RC3225F1581CS

Samsung Electro-MechanicsIn Stock: 897RC3225F1581CS Datasheet

Current PartRFQ

ERJ-14NF1581U

Panasonic Electronic ComponentsIn Stock: 885ERJ-14NF1581U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F1581CS is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 1.58 kOhms
• Tolerance: ±1%
• Package format: 1210 (3225 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

Allowable Variation:

• Power rating: The substitute part may have equal or higher power dissipation capacity than the original 0.333W specification

The identified substitute ERJ-14NF1581U meets all mandatory parameters with an increased power rating of 0.5W (1/2W), which provides additional thermal margin without affecting circuit compatibility.

Parameter Comparison

Engineering Selection Recommendations

RC3225F1581CS (Primary Selection): The RC3225F1581CS maintains Active product status, indicating ongoing manufacturer support and availability for new design implementations. This component is the preferred choice for new applications and designs with standard lead time requirements.

ERJ-14NF1581U (Substitute Selection): The ERJ-14NF1581U is electrically and mechanically compatible with the RC3225F1581CS across all critical parameters. However, this part carries a "Not For New Designs" product status designation. The substitute is suitable for:

• Replacement in existing production runs
• Supply chain contingency when primary component availability is constrained
• Applications where the increased 0.5W power rating provides beneficial thermal margin

The ERJ-14NF1581U includes AEC-Q200 automotive qualification, which exceeds the base specification of the RC3225F1581CS and may provide additional reliability assurance in demanding environments.

Frequently Asked Questions (FAQ)

Q: Can ERJ-14NF1581U be used as a direct replacement for RC3225F1581CS in existing designs?

A: Yes. Both components share identical resistance (1.58 kOhms), tolerance (±1%), package format (1210), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). The ERJ-14NF1581U has a higher power rating (0.5W vs. 0.333W), which is compatible with circuits designed for the original component.

Q: What is the significance of the "Not For New Designs" status on the ERJ-14NF1581U?

A: This designation indicates that Panasonic does not recommend the ERJ-14NF1581U for new product development. However, it remains available for replacement and maintenance of existing applications. For new designs, the RC3225F1581CS (Active status) is the recommended choice.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist. The RC3225F1581CS measures 0.126" L x 0.100" W (3.20mm x 2.55mm) with a maximum seated height of 0.026" (0.66mm). The ERJ-14NF1581U measures 0.126" L x 0.098" W (3.20mm x 2.50mm) with a maximum seated height of 0.028" (0.70mm). Both fit the 1210 package specification, and these variations are within standard PCB layout tolerances.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RC3225F1581CS and ERJ-14NF1581U are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. The ERJ-14NF1581U additionally carries AEC-Q200 automotive qualification.

Q: What packaging formats are available for these parts?

A: The RC3225F1581CS is available in standard packaging. The ERJ-14NF1581U is supplied in Tape & Reel (TR) format, which is standard for high-volume production and automated assembly processes.