RC3225F3923CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225F3923CS is a 392 kOhm ±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 higher power ratings or alternative manufacturer certifications such as automotive qualification.

Substiute Parts

RC3225F3923CS

Samsung Electro-MechanicsIn Stock: 672RC3225F3923CS Datasheet

Current PartRFQ

ERJ-14NF3923U

Panasonic Electronic ComponentsIn Stock: 10147ERJ-14NF3923U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RC3225F3923CS is based on the following criteria:

Mandatory Matching Parameters:

• Resistance value: 392 kOhms (exact match required)
• Tolerance: ±1% (substitute tolerance must not exceed this value)
• Package format: 1210 (3225 Metric) (physical and electrical footprint compatibility)
• Composition: Thick Film (ensures consistent electrical behavior)
• Temperature coefficient: ±100ppm/°C (substitute must match or be tighter)
• Operating temperature range: -55°C to 155°C (substitute must support this range)

Allowable Variations:

• Power rating: Substitute may exceed 0.333W (higher power rating is acceptable and provides design margin)
• Manufacturer: Different manufacturers permitted if all electrical and mechanical parameters align
• Product status: Active or Not For New Designs both acceptable if electrical specifications match
• Certifications: Additional certifications (such as AEC-Q200 automotive qualification) are permissible additions

The ERJ-14NF3923U from Panasonic Electronic Components qualifies as a direct substitute based on these criteria. It maintains identical resistance, tolerance, package, composition, temperature coefficient, and operating temperature range. The substitute provides a higher power rating of 0.5W (1/2W), which exceeds the original 0.333W requirement and is therefore compatible with the design.

Parameter Comparison

Engineering Selection Recommendations

Primary Component (RC3225F3923CS): The RC3225F3923CS maintains Active product status and is manufactured by Samsung Electro-Mechanics. This component is the preferred choice when supply availability permits. It is ROHS3 compliant and carries MSL 1 rating, indicating no moisture sensitivity restrictions during handling and storage.

Substitute Component (ERJ-14NF3923U): The ERJ-14NF3923U from Panasonic Electronic Components is electrically and mechanically equivalent to the primary component. Although designated as Not For New Designs, this status does not affect its suitability as a substitute for existing designs or when the primary component is unavailable. The substitute carries AEC-Q200 automotive qualification, which provides additional reliability assurance for applications requiring automotive-grade components. The higher power rating of 0.5W provides additional thermal margin compared to the original 0.333W specification.

Selection Criteria:

• Use RC3225F3923CS when available and supply lead times are acceptable
• Use ERJ-14NF3923U when primary component availability is constrained or when automotive-grade qualification is required
• Both components are suitable for applications operating within the -55°C to 155°C temperature range
• Both components meet ROHS3 compliance requirements

Frequently Asked Questions (FAQ)

Q: Can ERJ-14NF3923U be used as a direct replacement for RC3225F3923CS?

A: Yes. The ERJ-14NF3923U is electrically and mechanically compatible. Both components have identical resistance (392 kOhms), tolerance (±1%), package format (1210), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). The substitute's higher power rating (0.5W versus 0.333W) is acceptable and provides additional thermal margin.

Q: What does "Not For New Designs" mean for the ERJ-14NF3923U?

A: This designation indicates that Panasonic has discontinued this part for new design applications. However, it remains suitable as a substitute component for existing designs or when the primary component is unavailable. The electrical and mechanical specifications remain unchanged.

Q: Are there physical dimension differences between these components?

A: Minor dimensional variations exist. The RC3225F3923CS 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-14NF3923U 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 footprint and are compatible with standard PCB layouts designed for this package format.

Q: Does the AEC-Q200 certification on the ERJ-14NF3923U affect compatibility?

A: No. AEC-Q200 is an automotive qualification standard that indicates additional reliability testing. This certification is a superset of standard requirements and does not create incompatibility. Components with AEC-Q200 certification are suitable for both automotive and non-automotive applications.

Q: What is the significance of MSL 1 rating for both components?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited moisture sensitivity. Both components require no special moisture control during storage, handling, or assembly. Standard warehouse conditions and normal manufacturing processes are acceptable.

Q: Can these components be used interchangeably in the same circuit?

A: Yes. The electrical characteristics are identical. The components can be used interchangeably without circuit redesign or performance impact. The higher power rating of the substitute provides additional design margin without affecting circuit operation.