RCS3216F4990CS Equivalent & Substitute Parts Reference

Part Overview

The RCS3216F4990CS is a 499 Ohms ±1% 0.25W (1/4W) 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 characteristics. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1) and operates across -55°C to 155°C temperature range.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size, termination count), and environmental performance parameters (operating temperature range, composition type). Substitutes enable design flexibility, supply chain alternatives, and application-specific feature selection while maintaining functional equivalence.

Key Parameters

Parameter	Value	Specification Basis
Resistance	499 Ohms	Core electrical specification
Tolerance	±1%	Precision requirement
Power Rating	0.25W (1/4W)	Thermal dissipation capacity
Package / Case	1206 (3216 Metric)	Physical form factor and PCB compatibility
Composition	Thick Film	Manufacturing technology
Operating Temperature	-55°C ~ 155°C	Environmental performance range
Temperature Coefficient	±100ppm/°C	Stability specification
Number of Terminations	2	Connection points
RoHS Status	ROHS3 Compliant	Regulatory compliance
Moisture Sensitivity Level	1 (Unlimited)	Handling and storage requirements

Substitute Part Grouping Explanation

Substitution logic is based on strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 499 Ohms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package: 1206 (3216 Metric)
Composition: Thick Film
Operating temperature range: -55°C ~ 155°C
Temperature coefficient: ±100ppm/°C
Terminations: 2

Compliance and Certification Parameters:

RoHS Status: ROHS3 Compliant (primary substitutes)
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected (primary substitutes)

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (Full Compliance Match): Parts meeting all mandatory electrical, mechanical, and compliance parameters with ROHS3 compliance and REACH unaffected status.

Category B - Functional Equivalents with Compliance Variations: Parts meeting all mandatory electrical and mechanical parameters but with alternative compliance status or enhanced features (automotive AEC-Q200 certification, higher power rating).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp (°C)	RoHS	AEC-Q200	Product Status
RCS3216F4990CS	Samsung Electro-Mechanics	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	No	Active
AC1206FR-07499RL	YAGEO	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	Yes	Active
CR1206-FX-4990ELF	Bourns Inc.	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	No	Active
CRCW1206499RFKEA	Vishay Dale	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	Yes	Active
CRCW1206499RFKEAHP	Vishay Dale	499 Ω	±1%	0.75	1206	±100ppm/°C	-55 ~ 155	ROHS3	Yes	Active
CRCW1206499RFKTA	Vishay Dale	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	Non-compliant	Yes	Active
ERJ-8ENF4990V	Panasonic Electronic Components	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	Yes	Not For New Designs
RC1206FR-07499RL	YAGEO	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	No	Active
RMCF1206FT499R	Stackpole Electronics Inc	499 Ω	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	Yes	Active

Engineering Selection Recommendations

Primary Substitutes (Full Equivalence - Active Status, ROHS3 Compliant):

AC1206FR-07499RL (YAGEO) - Active product with automotive AEC-Q200 certification. ROHS3 compliant, REACH unaffected. Suitable for automotive and industrial applications requiring certified components.
CR1206-FX-4990ELF (Bourns Inc.) - Active product with moisture-resistant thick film composition. ROHS3 compliant, REACH unaffected. High inventory availability (93,716 pcs).
CRCW1206499RFKEA (Vishay Dale) - Active product with automotive AEC-Q200 certification. ROHS3 compliant, REACH unaffected. Suitable for automotive applications.
RC1206FR-07499RL (YAGEO) - Active product with moisture-resistant thick film composition. ROHS3 compliant, REACH unaffected. High inventory availability (94,723 pcs).
RMCF1206FT499R (Stackpole Electronics Inc) - Active product with automotive AEC-Q200 certification. ROHS3 compliant, REACH unaffected. High inventory availability (84,881 pcs).

Secondary Substitutes (Functional Equivalence with Compliance Variations):

CRCW1206499RFKEAHP (Vishay Dale) - Active product with enhanced 0.75W power rating and automotive AEC-Q200 certification. ROHS3 compliant. Use when higher thermal dissipation capacity is required within the same package footprint.
CRCW1206499RFKTA (Vishay Dale) - Active product with automotive AEC-Q200 certification. RoHS non-compliant and REACH affected. Use only in applications where RoHS compliance is not mandated.

Not Recommended for New Designs:

ERJ-8ENF4990V (Panasonic Electronic Components) - Product status is "Not For New Designs." Although ROHS3 compliant and AEC-Q200 certified, this part should not be selected for new design implementations.

Frequently Asked Questions (FAQ)

Q1: Can I substitute RCS3216F4990CS with any of the listed parts without circuit redesign?

A: Yes, all parts in the Primary Substitutes category (AC1206FR-07499RL, CR1206-FX-4990ELF, CRCW1206499RFKEA, RC1206FR-07499RL, RMCF1206FT499R) are electrically and mechanically equivalent. They share identical resistance (499 Ω), tolerance (±1%), power rating (0.25W), package (1206), operating temperature range (-55°C ~ 155°C), and temperature coefficient (±100ppm/°C). No circuit modifications are required.

Q2: What is the difference between parts with and without AEC-Q200 certification?

A: AEC-Q200 is an automotive qualification standard. Parts with AEC-Q200 certification (AC1206FR-07499RL, CRCW1206499RFKEA, RMCF1206FT499R, ERJ-8ENF4990V) have undergone additional reliability testing for automotive applications. The RCS3216F4990CS does not carry this certification. Use AEC-Q200 certified parts for automotive or mission-critical applications; use non-certified parts for general industrial or consumer applications.

Q3: Why is CRCW1206499RFKEAHP listed as a substitute if it has 0.75W power rating instead of 0.25W?

A: CRCW1206499RFKEAHP is a functional equivalent with enhanced specifications. The higher power rating (0.75W vs. 0.25W) allows greater thermal dissipation capacity while maintaining the same physical package, resistance value, tolerance, and operating temperature range. This part can substitute the original in applications requiring higher power handling without changing PCB layout. However, it is not a direct equivalent and should only be used when the enhanced power rating is beneficial or required.

Q4: Should I use CRCW1206499RFKTA for new designs?

A: CRCW1206499RFKTA is not recommended for new designs. Although it is electrically and mechanically equivalent with AEC-Q200 certification, it is RoHS non-compliant and REACH affected. Use this part only in legacy systems or applications where RoHS compliance is not required. For new designs, select from the Primary Substitutes category.

Q5: Why is ERJ-8ENF4990V marked "Not For New Designs"?

A: ERJ-8ENF4990V carries a "Not For New Designs" product status from Panasonic Electronic Components. This designation indicates the manufacturer is phasing out this part. Although it meets all electrical and mechanical specifications with ROHS3 compliance and AEC-Q200 certification, it should not be selected for new product development to avoid future supply discontinuation. Select alternative parts from the Primary Substitutes category instead.

Q6: Are there any physical dimension differences between substitutes?

A: Yes, minor dimensional variations exist. The main part RCS3216F4990CS has dimensions of 0.126" L x 0.063" W (3.20mm x 1.60mm) with maximum seated height of 0.026" (0.66mm). Some substitutes have slightly different dimensions: AC1206FR-07499RL and CRCW1206499RFKEAHP measure 0.122" L x 0.063" W (3.10mm x 1.60mm). These variations are within standard 1206 package tolerances and do not affect PCB layout compatibility. All parts use identical 1206 (3216 Metric) package designation and two-termination configuration.

Q7: What is Moisture Sensitivity Level (MSL) and why is it important?

A: Moisture Sensitivity Level (MSL) indicates how sensitive a component is to moisture absorption during storage and handling. All listed parts have MSL 1 (Unlimited), meaning they have unlimited shelf life and do not require special moisture-controlled storage conditions. This simplifies inventory management and reduces handling costs compared to higher MSL components.

Q8: Are all substitutes ROHS3 compliant?

A: No. CRCW1206499RFKTA is RoHS non-compliant. All other substitutes (AC1206FR-07499RL, CR1206-FX-4990ELF, CRCW1206499RFKEA, CRCW1206499RFKEAHP, ERJ-8ENF4990V, RC1206FR-07499RL, RMCF1206FT499R) are ROHS3 compliant. For applications subject to RoHS regulations (EU, China, and other regions), use only ROHS3 compliant parts.

Q9: Which substitute has the highest inventory availability?

A: CR1206-FX-4990ELF (Bourns Inc.) has the highest inventory with 93,716 pcs in stock, followed by RC1206FR-07499RL (YAGEO) with 94,723 pcs and RMCF1206FT499R (Stackpole Electronics Inc) with 84,881 pcs. The original RCS3216F4990CS has 1,191 pcs available.

Q10: Can I mix different substitute parts in the same circuit board?

A: Yes. All Primary Substitutes are electrically and mechanically equivalent. Mixing different manufacturers' parts in the same design is acceptable from a functional standpoint. However, for consistency in manufacturing, testing, and traceability, it is recommended to standardize on a single part number per design unless supply constraints require otherwise.

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