RC3225F27R4CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225F27R4CS is a 27.4 Ohm ±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 with moisture-resistant construction 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 (Unlimited) moisture sensitivity rating.

Substitute components become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit higher power ratings or enhanced automotive qualification. The substitute parts listed maintain electrical equivalence through identical resistance value, tolerance, temperature coefficient, and package dimensions while offering alternative manufacturer options and in some cases enhanced power ratings or automotive certifications.

Key Parameters

Parameter	Value	Substitution Relevance
Resistance Value	27.4 Ohms	Must match exactly
Tolerance	±1%	Must match exactly
Power Rating	0.333W (1/3W)	Substitutes may exceed this rating
Package / Case	1210 (3225 Metric)	Must match for PCB compatibility
Composition	Thick Film	Must match
Temperature Coefficient	±100ppm/°C	Must match
Operating Temperature Range	-55°C to 155°C	Must match or exceed
RoHS Status	ROHS3 Compliant	Must maintain compliance
Moisture Sensitivity Level	MSL 1 (Unlimited)	Must match or be lower

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F27R4CS is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Matching Parameters:

Resistance value: 27.4 Ohms (exact match required)
Tolerance: ±1% (exact match required)
Package format: 1210 (3225 Metric) (exact match required for PCB footprint compatibility)
Composition: Thick Film (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature range: -55°C to 155°C (substitutes must meet or exceed this range)
RoHS compliance: ROHS3 (substitutes must maintain this compliance level)

Allowable Variation Parameters:

Power rating: Substitutes may have equal or higher power ratings (0.333W or greater)
Moisture sensitivity level: Substitutes must have MSL 1 or lower (MSL 1 is acceptable)
Automotive qualification: Substitutes may include AEC-Q200 certification as an enhancement
Product status: Active status preferred; Not For New Designs acceptable for legacy applications

All three substitute parts meet these criteria and are electrically and mechanically interchangeable with the RC3225F27R4CS within the specified parameters.

Parameter Comparison

Parameter	RC3225F27R4CS (Samsung)	CRCW121027R4FKEA (Vishay Dale)	ERJ-14NF27R4U (Panasonic)	RMCF1210FT27R4 (Stackpole)
Resistance	27.4 Ohms	27.4 Ohms	27.4 Ohms	27.4 Ohms
Tolerance	±1%	±1%	±1%	±1%
Power Rating	0.333W (1/3W)	0.5W (1/2W)	0.5W (1/2W)	0.5W (1/2W)
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)	1210 (3225 Metric)	1210 (3225 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C
Size / Dimension	0.126" L x 0.100" W (3.20mm x 2.55mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height - Seated (Max)	0.026" (0.66mm)	0.024" (0.60mm)	0.028" (0.70mm)	0.028" (0.70mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)	MSL 1 (Unlimited)	MSL 1 (Unlimited)	MSL 1 (Unlimited)
Product Status	Active	Active	Not For New Designs	Active
Automotive Qualification	None specified	AEC-Q200	AEC-Q200	AEC-Q200

Engineering Selection Recommendations

Primary Substitutes (Active Status, Recommended for New Designs):

CRCW121027R4FKEA (Vishay Dale) and RMCF1210FT27R4 (Stackpole Electronics Inc) are the preferred substitute options. Both maintain Active product status, ROHS3 compliance, and MSL 1 rating. Both include AEC-Q200 automotive qualification, which provides enhanced reliability assurance. The CRCW121027R4FKEA offers the lowest seated height at 0.024" (0.60mm), while RMCF1210FT27R4 provides maximum inventory availability at 5,545 pieces in stock.

Secondary Substitute (Legacy Applications):

ERJ-14NF27R4U (Panasonic Electronic Components) carries "Not For New Designs" product status but remains electrically and mechanically equivalent. This part is suitable for replacement applications, legacy system maintenance, or when design revision is not feasible. AEC-Q200 qualification is present. Inventory availability is 8,795 pieces.

Power Rating Consideration:

All three substitute parts feature 0.5W (1/2W) power ratings, which exceed the RC3225F27R4CS specification of 0.333W (1/3W). This higher rating provides thermal margin and is fully compatible with circuit designs specified for the original part. No derating or thermal analysis modification is required.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing supply chain and manufacturing processes. REACH status is unaffected for all parts.

Frequently Asked Questions (FAQ)

Q: Can CRCW121027R4FKEA, ERJ-14NF27R4U, or RMCF1210FT27R4 be used as direct replacements for RC3225F27R4CS?

A: Yes. All three substitute parts are electrically and mechanically equivalent. They share identical resistance value (27.4 Ohms), tolerance (±1%), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and 1210 (3225 Metric) package format. PCB footprint compatibility is maintained.

Q: Why do the substitute parts have higher power ratings (0.5W vs. 0.333W)?

A: Higher power ratings in substitute components provide thermal margin and improved reliability under operating conditions. A 0.5W-rated resistor can safely handle the power dissipation requirements of a circuit designed for 0.333W. No circuit modification or thermal analysis revision is necessary.

Q: Are there dimensional differences between the main part and substitutes?

A: Minor dimensional variations exist. The RC3225F27R4CS has a width of 0.100" (2.55mm) and seated height of 0.026" (0.66mm). Substitute parts have widths of 0.098" (2.50mm) and seated heights ranging from 0.024" to 0.028" (0.60mm to 0.70mm). These variations remain within standard 1210 package tolerances and do not affect PCB assembly compatibility.

Q: Which substitute part should be selected for new product designs?

A: CRCW121027R4FKEA or RMCF1210FT27R4 are recommended for new designs, as both maintain Active product status. CRCW121027R4FKEA offers the lowest seated height profile. RMCF1210FT27R4 provides the highest inventory availability. Both include AEC-Q200 automotive qualification.

Q: Is ERJ-14NF27R4U suitable for use?

A: ERJ-14NF27R4U is electrically and mechanically equivalent but carries "Not For New Designs" product status. It is appropriate for replacement, repair, or legacy system applications where design revision is not feasible.

Q: Do all parts maintain RoHS and REACH compliance?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of the RC3225F27R4CS.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and requires no special moisture control during storage or handling. All parts in this comparison maintain this rating, ensuring compatibility with standard manufacturing and storage practices.

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