RC3225F3090CS Equivalent & Substitute Parts

Part Overview

The RC3225F3090CS is a 309 Ohms ±1% 1/3W chip resistor manufactured by Samsung Electro-Mechanics in the 1210 (3225 Metric) package. This thick film, moisture-resistant component operates across -55°C to 155°C and is ROHS3 compliant. The part is currently in active production status with 1137 units available in inventory.

Equivalent and substitute parts are identified when design requirements permit tolerance of higher power ratings, different product statuses, or alternative certifications while maintaining core electrical specifications and mechanical compatibility.

Substiute Parts

RC3225F3090CS

Samsung Electro-MechanicsIn Stock: 1148RC3225F3090CS Datasheet

Current PartRFQ

ERJ-14NF3090U

Panasonic Electronic ComponentsIn Stock: 21307ERJ-14NF3090U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC3225F3090CS is determined by the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 309 Ohms
• Tolerance: ±1%
• Temperature Coefficient: ±100ppm/°C
• Operating Temperature Range: -55°C ~ 155°C

Mechanical Parameters (Must Match):

• Package / Case: 1210 (3225 Metric)
• Number of Terminations: 2

Allowable Variations:

• Power Rating: Equal or higher than 0.333W (1/3W)
• Composition: Thick Film
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS Compliance: ROHS3 or equivalent

Product Status Consideration: Substitutes may have different product status designations (Active, Not For New Designs, etc.). Selection depends on application lifecycle requirements.

The identified substitute ERJ-14NF3090U meets all electrical and mechanical compatibility criteria while offering a higher power rating of 0.5W (1/2W) and automotive AEC-Q200 certification.

Parameter Comparison

Engineering Selection Recommendations

RC3225F3090CS Selection Criteria:

• Primary choice for new designs requiring active product status
• Suitable for general industrial and consumer applications
• Moisture-resistant feature appropriate for standard operating environments
• Current inventory availability: 1137 units

ERJ-14NF3090U Selection Criteria:

• Higher power rating (0.5W vs. 0.333W) accommodates designs with increased thermal margin
• Automotive AEC-Q200 certification required for automotive applications
• Product status "Not For New Designs" restricts use to legacy system support or existing design continuations
• Significantly higher inventory availability: 21235 units
• Minimal dimensional variation (0.002" width, 0.002" height) ensures PCB layout compatibility

Substitution Decision Logic:

• Use RC3225F3090CS for new designs in non-automotive applications
• Use ERJ-14NF3090U when automotive qualification is required or when higher power dissipation capability is necessary
• Both parts maintain identical electrical performance and mechanical fit within standard PCB tolerances

Frequently Asked Questions (FAQ)

Q: Can ERJ-14NF3090U replace RC3225F3090CS in existing designs?

A: Yes, from an electrical and mechanical standpoint. The ERJ-14NF3090U provides identical resistance, tolerance, temperature coefficient, and operating range. The higher power rating (0.5W vs. 0.333W) is a compatible upgrade. However, verify that your application does not require the "Active" product status designation. The ERJ-14NF3090U is marked "Not For New Designs," which may affect long-term supply availability.

Q: What is the significance of the power rating difference?

A: The RC3225F3090CS is rated at 0.333W (1/3W), while the ERJ-14NF3090U is rated at 0.5W (1/2W). A higher power rating indicates greater thermal dissipation capability. If your circuit dissipates less than 0.333W through the resistor, both parts perform identically. If dissipation approaches or exceeds 0.333W, the ERJ-14NF3090U provides additional thermal margin.

Q: Are there dimensional compatibility concerns?

A: Dimensional differences are minimal. The ERJ-14NF3090U is 0.002" narrower in width (2.50mm vs. 2.55mm) and 0.002" taller in height (0.70mm vs. 0.66mm). Both parts conform to the 1210 (3225 Metric) package standard. Standard PCB design tolerances accommodate these variations without layout modification.

Q: Why is the ERJ-14NF3090U marked "Not For New Designs"?

A: This designation indicates that Panasonic is transitioning this part number toward discontinuation. While currently in stock with high availability (21235 units), new designs should prioritize the RC3225F3090CS or evaluate alternative suppliers for long-term supply security.

Q: What does AEC-Q200 certification mean?

A: AEC-Q200 is an automotive industry standard qualification for passive components. It certifies that the ERJ-14NF3090U meets automotive reliability, temperature cycling, and performance requirements. This certification is required for automotive applications but is not necessary for general industrial or consumer use.

Q: Can I use RC3225F3090CS in automotive applications?

A: The RC3225F3090CS does not carry AEC-Q200 certification. Automotive applications typically require AEC-Q200 qualified components. If automotive use is required, specify the ERJ-14NF3090U or identify an alternative part with appropriate automotive certification.

Q: Are there other substitutes available?

A: The ERJ-14NF3090U documentation references additional substitute part numbers: AC1210FR-07309RL, AF1210FR-07309RL, ERJ-S14F3090U, RC1210FR-07309RL, and RMCF1210FT309R. These parts maintain the same 309 Ohms ±1% specification and 1210 package but may have different manufacturers, power ratings, or certifications. Detailed parameter comparison with each alternative is required for specific application compatibility.