RCS3216F1240CS Equivalent & Substitute Parts

Part Overview

The RCS3216F1240CS is a 124 Ohm ±1% 0.25W (1/4W) chip resistor in 1206 (3216 Metric) package manufactured by Samsung Electro-Mechanics. This thick film resistor features anti-sulfur and moisture-resistant construction, operating across -55°C to 155°C with a temperature coefficient of ±100ppm/°C. The part is currently Active in product status with 1071 pieces in stock inventory.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size and form factor), environmental performance (operating temperature range, moisture resistance), and regulatory compliance (RoHS3, REACH status). Substitutes enable design flexibility, supply chain continuity, and alternative sourcing options when the primary part becomes unavailable.

Key Parameters

Parameter	Value
Resistance	124 Ohms
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
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the RCS3216F1240CS is determined by strict equivalence across the following critical parameters:

Electrical Equivalence: Resistance value must be 124 Ohms with ±1% tolerance. Power rating must be 0.25W (1/4W) minimum to ensure thermal performance under identical operating conditions.

Mechanical Compatibility: Package designation must be 1206 (3216 Metric) to ensure PCB footprint compatibility, land pattern alignment, and assembly process compatibility.

Environmental Performance: Operating temperature range must span -55°C to 155°C. Temperature coefficient must be ±100ppm/°C. Composition must be thick film. Moisture resistance is required.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and REACH Unaffected status to satisfy regulatory requirements.

Moisture Sensitivity: MSL rating of 1 (Unlimited) is required for unrestricted storage and handling.

Parts that deviate from these parameters—including higher power ratings (0.75W), automotive-specific certifications (AEC-Q200), or obsolete product status—are listed with explicit parameter differences for engineering evaluation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Composition	Temp Coeff	Operating Temp	MSL	RoHS Status	Product Status	Inventory
RCS3216F1240CS	Samsung Electro-Mechanics	124 Ohms	±1%	0.25W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Active	1071 Pcs
AC1206FR-07124RL	YAGEO	124 Ohms	±1%	0.25W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Active	11043 Pcs
CR1206-FX-1240ELF	Bourns Inc.	124 Ohms	±1%	0.25W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Active	25682 Pcs
CRCW1206124RFKEA	Vishay Dale	124 Ohms	±1%	0.25W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Active	23993 Pcs
RC1206FR-07124RL	YAGEO	124 Ohms	±1%	0.25W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Active	65100 Pcs
CRCW1206124RFKEAHP	Vishay Dale	124 Ohms	±1%	0.75W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Active	10679 Pcs
ERJ-8ENF1240V	Panasonic Electronic Components	124 Ohms	±1%	0.25W	1206	Thick Film	±100ppm/°C	-55°C ~ 155°C	1	ROHS3	Not For New Designs	56771 Pcs

Engineering Selection Recommendations

Direct Equivalents (Recommended for New Designs):

The following parts are direct electrical and mechanical equivalents with Active product status:

RC1206FR-07124RL (YAGEO): Highest inventory availability (65100 Pcs). Identical electrical specifications and operating parameters. Active product status ensures long-term supply continuity.
CRCW1206124RFKEA (Vishay Dale): Strong inventory position (23993 Pcs). Meets all electrical and mechanical requirements. Active product status.
CR1206-FX-1240ELF (Bourns Inc.): Largest inventory among direct equivalents (25682 Pcs). Fully compatible specifications. Active product status.
AC1206FR-07124RL (YAGEO): Adequate inventory (11043 Pcs). Complete electrical and mechanical equivalence. Active product status.

Alternative with Enhanced Power Rating:

CRCW1206124RFKEAHP (Vishay Dale): Identical to CRCW1206124RFKEA except power rating is 0.75W (3/4W) instead of 0.25W (1/4W). This higher power rating provides thermal margin in applications where the standard 0.25W rating is marginal. Use only when the 0.75W rating is acceptable for the circuit design. Active product status.

Obsolete Status (Not Recommended for New Designs):

ERJ-8ENF1240V (Panasonic Electronic Components): Product status is "Not For New Designs." Although inventory is substantial (56771 Pcs), this part should not be selected for new circuit designs due to end-of-life status. Existing designs may continue using available stock.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1206FR-07124RL for RCS3216F1240CS in my design?

A: Yes. RC1206FR-07124RL is a direct electrical and mechanical equivalent. Both parts are 124 Ohm ±1% 0.25W resistors in 1206 package with identical operating temperature range (-55°C to 155°C), temperature coefficient (±100ppm/°C), and regulatory compliance (ROHS3, REACH Unaffected). PCB footprint and assembly compatibility are identical.

Q: What is the difference between CRCW1206124RFKEA and CRCW1206124RFKEAHP?

A: The primary difference is power rating. CRCW1206124RFKEA is rated 0.25W (1/4W), matching the RCS3216F1240CS specification. CRCW1206124RFKEAHP is rated 0.75W (3/4W), providing higher thermal capacity. All other electrical parameters (124 Ohms, ±1% tolerance, operating temperature, temperature coefficient) are identical. The 0.75W variant is suitable only for applications where higher power dissipation capability is required or beneficial.

Q: Why is ERJ-8ENF1240V listed if it has "Not For New Designs" status?

A: ERJ-8ENF1240V is included for reference and for designs already in production using this part. The "Not For New Designs" status indicates Panasonic has discontinued this product for new applications. For new circuit designs, select from the Active status alternatives: RC1206FR-07124RL, CRCW1206124RFKEA, CR1206-FX-1240ELF, or AC1206FR-07124RL.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel packaging, which is standard for automated PCB assembly. The main part RCS3216F1240CS is supplied in "-" packaging designation, but all substitutes use TR packaging compatible with standard pick-and-place equipment.

Q: Do any substitute parts have automotive certification?

A: Yes. AC1206FR-07124RL, CRCW1206124RFKEA, CRCW1206124RFKEAHP, and ERJ-8ENF1240V carry AEC-Q200 automotive qualification. The RCS3216F1240CS main part and CR1206-FX-1240ELF and RC1206FR-07124RL do not list AEC-Q200 certification. Select AEC-Q200 certified parts only if automotive qualification is a design requirement.

Q: What is the inventory advantage of selecting RC1206FR-07124RL?

A: RC1206FR-07124RL has the highest inventory availability at 65100 pieces, compared to 1071 pieces for the main part RCS3216F1240CS. This inventory depth reduces supply risk and lead time for high-volume production runs.

Q: Can I use these parts interchangeably on the same PCB?

A: Yes, for the direct equivalents (RC1206FR-07124RL, CRCW1206124RFKEA, CR1206-FX-1240ELF, AC1206FR-07124RL). All share identical 1206 package dimensions and electrical specifications. Physical dimensions vary slightly (length 3.10mm to 3.20mm, height 0.60mm to 0.75mm), but these variations are within PCB design tolerances and do not affect assembly or functionality.

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