RCS3216J124CS Equivalent & Substitute Parts Reference

Part Overview

The RCS3216J124CS is a 120 kOhms ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with anti-sulfur and moisture-resistant properties. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative certifications are required for specific applications (such as automotive AEC-Q200 qualification), or when design requirements necessitate improved tolerance specifications or enhanced power ratings within the same package footprint.

Key Parameters

Parameter	Value
Resistance	120 kOhms
Tolerance	±5%
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RCS3216J124CS is determined by the following mandatory parameters:

Critical Parameters (Must Match):

Resistance value: 120 kOhms
Package / Case: 1206 (3216 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Tolerance: ±5% (primary specification) or ±1% (tighter tolerance acceptable for direct substitution)
Power Rating: 0.25W (primary specification) or 0.75W (higher rating acceptable for direct substitution)
Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Digi-Reel® formats are interchangeable based on assembly requirements
Certifications: Automotive AEC-Q200 qualification is an additional feature that does not prevent substitution

Product Status Consideration: Parts with Active product status are preferred. Parts marked "Not For New Designs" remain functionally equivalent but should be evaluated for long-term availability in production environments.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Temperature Coefficient	Operating Temp	RoHS Status	MSL	Product Status
RCS3216J124CS	Samsung Electro-Mechanics	120 kOhms	±5%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
AC1206FR-07120KL	YAGEO	120 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
AC1206JR-07120KL	YAGEO	120 kOhms	±5%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
CR1206-FX-1203ELF	Bourns Inc.	120 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
CRCW1206120KFKEA	Vishay Dale	120 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
CRCW1206120KFKEAHP	Vishay Dale	120 kOhms	±1%	0.75W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
ERJ-8ENF1203V	Panasonic Electronic Components	120 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Not For New Designs
RC1206FR-07120KL	YAGEO	120 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active
RC1206JR-07120KL	YAGEO	120 kOhms	±5%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	ROHS3	1	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Tolerance and Power Rating):

AC1206JR-07120KL and RC1206JR-07120KL are direct functional equivalents to RCS3216J124CS, maintaining the ±5% tolerance and 0.25W power rating. Both parts are Active status and ROHS3 compliant. AC1206JR-07120KL includes Automotive AEC-Q200 certification. RC1206JR-07120KL is available in higher inventory quantities (529,089 pcs) with Cut Tape and Tape & Reel packaging options.

Improved Tolerance Substitutes (±1% Tolerance, Same Power Rating):

AC1206FR-07120KL, CR1206-FX-1203ELF, CRCW1206120KFKEA, RC1206FR-07120KL, and ERJ-8ENF1203V provide tighter tolerance specifications (±1%) while maintaining 0.25W power rating and 1206 package. These parts are suitable when circuit design requires improved accuracy. AC1206FR-07120KL, CRCW1206120KFKEA, and ERJ-8ENF1203V include Automotive AEC-Q200 certification. ERJ-8ENF1203V is marked "Not For New Designs" and should be avoided for new product development.

Enhanced Power Rating Substitute:

CRCW1206120KFKEAHP provides 0.75W power rating with ±1% tolerance in the same 1206 package. This part is suitable for applications requiring higher pulse withstanding capability. Automotive AEC-Q200 certification is included.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level. Automotive AEC-Q200 certification is available in AC series (YAGEO), CRCW series (Vishay Dale), and ERJ-8EN series (Panasonic) parts for applications requiring automotive-grade qualification.

Frequently Asked Questions (FAQ)

Q: Can AC1206FR-07120KL replace RCS3216J124CS directly?

A: Yes. AC1206FR-07120KL is a direct substitute. It maintains the same 120 kOhms resistance, 0.25W power rating, 1206 package, and operating temperature range. The tolerance is tighter (±1% versus ±5%), which is acceptable for direct substitution. Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between AC1206JR-07120KL and AC1206FR-07120KL?

A: Both parts are manufactured by YAGEO with identical resistance (120 kOhms), power rating (0.25W), and package (1206). The difference is tolerance: AC1206JR-07120KL has ±5% tolerance (matching the original part), while AC1206FR-07120KL has ±1% tolerance. Both include Automotive AEC-Q200 certification.

Q: Why is CRCW1206120KFKEAHP listed as a substitute if it has 0.75W power rating?

A: CRCW1206120KFKEAHP is a valid substitute because higher power rating is an allowable variation. A 0.75W component can safely replace a 0.25W component in the same package without electrical incompatibility. This part is suitable when design requirements change or when enhanced pulse withstanding capability is needed.

Q: Can I use ERJ-8ENF1203V in new product designs?

A: ERJ-8ENF1203V is functionally equivalent to RCS3216J124CS but is marked "Not For New Designs" by the manufacturer. While the part remains electrically compatible, it should not be selected for new product development due to potential long-term availability concerns. Use RC1206FR-07120KL, AC1206FR-07120KL, or CR1206-FX-1203ELF instead.

Q: What packaging formats are available for these substitutes?

A: Substitute parts are available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® formats. RC1206FR-07120KL offers Cut Tape and Digi-Reel® options with the highest inventory (500,300 pcs). Selection depends on assembly equipment compatibility and procurement requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the original RCS3216J124CS specifications.

Q: Which substitute offers the best availability?

A: RC1206JR-07120KL has the highest inventory at 529,089 pcs, followed by RC1206FR-07120KL at 500,300 pcs. Both are YAGEO products with Active status and immediate availability.

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