RCS3216F1051CS Equivalent & Substitute Parts

Part Overview

The RCS3216F1051CS is a 1.05 kOhms ±1% 0.25W chip resistor manufactured by Samsung Electro-Mechanics in the 1206 (3216 Metric) package. This thick film resistor features anti-sulfur and moisture-resistant properties, operating across the temperature range of -55°C to 155°C. The part is currently Active in product status and maintains ROHS3 compliance with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative manufacturer options while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	1.05 kOhms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RCS3216F1051CS is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (1.05 kOhms), tolerance (±1%), power rating (0.25W), and temperature coefficient (±100ppm/°C) must be identical across all substitute parts.

Mechanical Compatibility: Package designation (1206 / 3216 Metric), number of terminations (2), and physical dimensions must accommodate the same PCB footprint and assembly processes.

Environmental & Compliance Requirements: All substitute parts must maintain ROHS3 compliance, MSL 1 rating, and operating temperature range of -55°C to 155°C.

Composition: Thick film construction is maintained across all qualified substitutes.

Substitute parts are grouped by manufacturer while maintaining 100% electrical and mechanical equivalence. Variations in height (seated maximum) and specific feature sets (anti-sulfur vs. moisture resistant vs. automotive AEC-Q200) do not affect substitution eligibility when all primary parameters align.

Parameter Comparison

Parameter	RCS3216F1051CS (Samsung)	CR1206-FX-1051ELF (Bourns)	CRCW12061K05FKEA (Vishay Dale)	ERJ-8ENF1051V (Panasonic)	RC1206FR-071K05L (YAGEO)
Resistance	1.05 kOhms	1.05 kOhms	1.05 kOhms	1.05 kOhms	1.05 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%
Power Rating	0.25W	0.25W	0.25W	0.25W	0.25W
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
Number of Terminations	2	2	2	2	2
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Height - Seated (Max)	0.026" (0.66mm)	0.030" (0.75mm)	0.024" (0.60mm)	0.028" (0.70mm)	0.026" (0.65mm)
Product Status	Active	Active	Active	Not For New Designs	Active

Engineering Selection Recommendations

Primary Selection (Active Status): CR1206-FX-1051ELF (Bourns Inc.), CRCW12061K05FKEA (Vishay Dale), and RC1206FR-071K05L (YAGEO) are all qualified substitutes with Active product status. These parts maintain full electrical and mechanical equivalence to the RCS3216F1051CS.

Automotive Applications: CRCW12061K05FKEA includes AEC-Q200 automotive qualification, suitable for applications requiring automotive-grade reliability standards.

Discontinued Consideration: ERJ-8ENF1051V (Panasonic Electronic Components) carries a "Not For New Designs" product status designation. While electrically and mechanically equivalent, this part should not be selected for new design implementations. Existing designs currently using this part may continue with it for production continuity.

Compliance Verification: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature specifications, confirming suitability for direct substitution in existing designs.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RCS3216F1051CS with any of the listed equivalent parts?

A: Yes. All listed substitute parts (CR1206-FX-1051ELF, CRCW12061K05FKEA, RC1206FR-071K05L) are electrically and mechanically equivalent. The ERJ-8ENF1051V is also equivalent but carries "Not For New Designs" status and should not be used in new applications.

Q: What determines if a part is a valid substitute?

A: Valid substitutes must match all critical parameters: 1.05 kOhms resistance, ±1% tolerance, 0.25W power rating, 1206 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, ROHS3 compliance, and MSL 1 rating.

Q: Are there differences in physical dimensions between substitute parts?

A: Yes. While all parts use the 1206 package, seated height varies slightly: RCS3216F1051CS (0.66mm), CR1206-FX-1051ELF (0.75mm), CRCW12061K05FKEA (0.60mm), ERJ-8ENF1051V (0.70mm), and RC1206FR-071K05L (0.65mm). These variations remain within standard 1206 package tolerances and do not affect PCB footprint compatibility.

Q: Which substitute should I select for automotive applications?

A: CRCW12061K05FKEA (Vishay Dale) includes AEC-Q200 automotive qualification. Select this part for designs requiring automotive-grade reliability standards.

Q: Why is ERJ-8ENF1051V marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development for this part. While currently available in inventory and electrically equivalent, it should not be incorporated into new design projects. Existing production designs may continue using this part.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All parts, including the primary RCS3216F1051CS, maintain MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

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