RC3225F1873CS Equivalent & Substitute Parts

Part Overview

The RC3225F1873CS is a 187 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 classified as Active product status and is ROHS3 compliant with 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 RC3225F1873CS has been identified with one primary substitute option that maintains core functional parameters while offering different power ratings and compliance certifications.

Substiute Parts

RC3225F1873CS

Samsung Electro-MechanicsIn Stock: 786RC3225F1873CS Datasheet

Current PartRFQ

ERJ-14NF1873U

Panasonic Electronic ComponentsIn Stock: 79210ERJ-14NF1873U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC3225F1873CS is based on strict equivalence of the following parameters:

Critical Matching Parameters:

• Resistance value: 187 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Package: 1210 (3225 Metric) (exact match required for PCB footprint compatibility)
• Composition: Thick Film (exact match required for electrical behavior)

Allowable Variation Parameters:

• Power Rating: Substitute must equal or exceed 0.333W minimum
• Temperature Coefficient: ±100ppm/°C (exact match required for thermal performance)
• Operating Temperature Range: Substitute must support -55°C ~ 155°C minimum
• Moisture Sensitivity Level: MSL 1 acceptable (unlimited moisture resistance)

Compliance Considerations:

• RoHS Status: Substitutes may differ (ROHS3 Compliant vs. RoHS non-compliant)
• Product Status: Active vs. Not For New Designs affects long-term availability
• Automotive Certification: AEC-Q200 available in substitute but not required for general applications

The identified substitute ERJ-14NF1873U meets all critical parameters with an upgraded power rating of 0.5W (1/2W), providing additional thermal margin while maintaining identical resistance, tolerance, package, and composition specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (RC3225F1873CS): Select the RC3225F1873CS for new designs requiring ROHS3 compliance and long-term component availability. Active product status ensures sustained manufacturing and supply chain stability. This component is suitable for general industrial and consumer applications where RoHS compliance is mandatory.

Substitute Selection (ERJ-14NF1873U): The ERJ-14NF1873U serves as a functional equivalent when RC3225F1873CS availability is constrained. The substitute provides identical electrical performance with upgraded power rating (0.5W vs. 0.333W), offering improved thermal margin in the same physical package. However, note the following considerations:

• Product Status: ERJ-14NF1873U is classified as "Not For New Designs," indicating Panasonic has discontinued active development for this component. Use only for legacy system maintenance or when supply of the primary part is unavailable.
• RoHS Compliance: ERJ-14NF1873U is RoHS non-compliant. Verify regulatory requirements before selection in applications subject to RoHS mandates.
• Automotive Certification: ERJ-14NF1873U carries AEC-Q200 qualification, providing additional reliability assurance for automotive and harsh environment applications if required.

Dimensional Compatibility: Both components maintain 1210 (3225 Metric) package footprint compatibility. Dimensional variations (width 0.100" vs. 0.098", height 0.026" vs. 0.028") are within standard PCB assembly tolerances and do not affect placement or soldering processes.

Frequently Asked Questions (FAQ)

Q1: Can ERJ-14NF1873U be used as a direct replacement for RC3225F1873CS on existing PCBs?

A: Yes. Both components share identical 1210 (3225 Metric) package footprints and electrical specifications (187 kOhms ±1%, ±100ppm/°C, -55°C ~ 155°C). Dimensional variations are within standard assembly tolerances. The substitute's higher power rating (0.5W vs. 0.333W) provides additional thermal capability without affecting circuit function.

Q2: What is the significance of the "Not For New Designs" status on ERJ-14NF1873U?

A: This designation indicates Panasonic has transitioned this component to end-of-life status and is not actively developing or promoting it for new applications. While existing inventory may be available, long-term supply cannot be guaranteed. Use this substitute only for legacy system support or temporary supply relief, not for new product development.

Q3: Does the RoHS non-compliance of ERJ-14NF1873U affect electrical performance?

A: No. RoHS compliance is a regulatory and environmental classification, not an electrical performance parameter. The RoHS non-compliant status of ERJ-14NF1873U does not alter its electrical characteristics. However, applications subject to RoHS mandates (EU, California, etc.) must use ROHS3-compliant components. Verify regulatory requirements before selection.

Q4: Are the dimensional differences between RC3225F1873CS and ERJ-14NF1873U significant?

A: No. Width difference (0.100" vs. 0.098") and height difference (0.026" vs. 0.028") are within standard PCB assembly tolerances (typically ±0.010" for chip component placement). Both components are functionally equivalent in 1210 package footprints and present no assembly or soldering complications.

Q5: What does the AEC-Q200 rating on ERJ-14NF1873U indicate?

A: AEC-Q200 is an automotive industry qualification standard for passive components, certifying reliability under automotive environmental conditions (temperature cycling, vibration, humidity). This rating is not present on the RC3225F1873CS. If automotive-grade reliability is required, ERJ-14NF1873U provides this additional assurance, though it is not necessary for general industrial applications.

Q6: Can both components be used interchangeably in the same circuit design?

A: Yes, within the constraints noted. Electrical performance is identical (187 kOhms ±1%, same temperature coefficient and operating range). The primary consideration is RoHS compliance requirement: if mandatory, use RC3225F1873CS; if not required and supply is constrained, ERJ-14NF1873U is functionally equivalent. The higher power rating of the substitute provides additional thermal margin.

Q7: What is Moisture Sensitivity Level (MSL) 1, and does it affect component handling?

A: MSL 1 indicates unlimited moisture resistance with no special storage or handling requirements. Both RC3225F1873CS and ERJ-14NF1873U carry MSL 1 rating, meaning they do not require dry-pack storage, baking before reflow, or moisture-controlled environments. Standard warehouse storage conditions are acceptable.