RCS3216F4993CS Equivalent & Substitute Parts Reference

Part Overview

The RCS3216F4993CS is a 499 kOhms ±1% 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 characteristics. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when electrical parameters (resistance value, tolerance, power rating, temperature coefficient, operating temperature range) and mechanical parameters (package type, case dimensions, termination count) match the original specification. Alternative sources become necessary for supply chain continuity, inventory availability, or application-specific requirements such as automotive qualification or enhanced pulse withstanding capability.

Key Parameters

Parameter	Value
Resistance	499 kOhms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Composition	Thick Film
Package / Case	1206 (3216 Metric)
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

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

Electrical Equivalence Requirements:

Resistance value: 499 kOhms (exact match)
Tolerance: ±1% (exact match)
Power rating: 0.25W (1/4W) for direct substitutes
Temperature coefficient: ±100ppm/°C (exact match)
Operating temperature range: -55°C to 155°C (exact match)
Composition: Thick Film (exact match)

Mechanical Equivalence Requirements:

Package type: 1206 (3216 Metric) (exact match)
Number of terminations: 2 (exact match)
RoHS compliance: ROHS3 Compliant (minimum requirement)
Moisture sensitivity: MSL 1 (exact match)

Substitute Categories:

Category A - Direct Electrical & Mechanical Equivalents (0.25W Rating): Parts meeting all electrical and mechanical parameters with 0.25W power rating: AF1206FR-07499KL, AC1206FR-07499KL, CHV1206-FX-4993ELF, CR1206-FX-4993ELF, CRCW1206499KFKEA, CRCW1206499KFKTA, ERJ-8ENF4993V, RC1206FR-07499KL, RMCF1206FT499K.

Category B - Enhanced Power Rating (0.75W Rating): Part CRCW1206499KFKEAHP meets all electrical and mechanical parameters but features 0.75W power rating with pulse withstanding capability. This part is suitable for applications requiring higher transient energy absorption while maintaining the same package footprint.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp (°C)	Features	RoHS	Product Status
RCS3216F4993CS	Samsung Electro-Mechanics	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Anti-Sulfur, Moisture Resistant	ROHS3	Active
AF1206FR-07499KL	YAGEO	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Anti-Sulfur, Automotive AEC-Q200	ROHS3	Active
AC1206FR-07499KL	YAGEO	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Automotive AEC-Q200, Moisture Resistant	ROHS3	Active
CHV1206-FX-4993ELF	Bourns Inc.	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	High Voltage	ROHS3	Active
CR1206-FX-4993ELF	Bourns Inc.	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	Active
CRCW1206499KFKEA	Vishay Dale	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	Active
CRCW1206499KFKEAHP	Vishay Dale	499k	±1%	0.75	1206	±100ppm/°C	-55 to 155	Automotive AEC-Q200, Pulse Withstanding	ROHS3	Active
CRCW1206499KFKTA	Vishay Dale	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Automotive AEC-Q200	RoHS Non-compliant	Active
ERJ-8ENF4993V	Panasonic Electronic Components	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	Not For New Designs
RC1206FR-07499KL	YAGEO	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	Active
RMCF1206FT499K	Stackpole Electronics Inc	499k	±1%	0.25	1206	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, ROHS3 Compliant, 0.25W):

For general-purpose applications requiring direct electrical and mechanical equivalence, the following parts are recommended based on Active product status and full ROHS3 compliance:

AF1206FR-07499KL (YAGEO): Active status with anti-sulfur and automotive AEC-Q200 qualification. Suitable for automotive and industrial applications.
AC1206FR-07499KL (YAGEO): Active status with automotive AEC-Q200 qualification and moisture resistance. High inventory availability (5900 pcs).
RC1206FR-07499KL (YAGEO): Active status with moisture-resistant thick film. Largest inventory availability (1,484,497 pcs) for high-volume requirements.
RMCF1206FT499K (Stackpole Electronics Inc): Active status with automotive AEC-Q200 qualification. Substantial inventory (232,536 pcs).
CRCW1206499KFKEA (Vishay Dale): Active status with automotive AEC-Q200 qualification. High inventory (73,824 pcs).
CHV1206-FX-4993ELF (Bourns Inc.): Active status with high-voltage thick film composition. Highest inventory among Bourns offerings (33,296 pcs).
CR1206-FX-4993ELF (Bourns Inc.): Active status with moisture-resistant thick film. Largest Bourns inventory (71,545 pcs).

Secondary Substitute (Enhanced Power Rating):

CRCW1206499KFKEAHP (Vishay Dale): Active status with 0.75W power rating and pulse withstanding capability. Use only when application requires higher transient energy absorption. Package footprint remains 1206 (3216 Metric).

Not Recommended for New Designs:

ERJ-8ENF4993V (Panasonic Electronic Components): Marked as "Not For New Designs" despite meeting electrical and mechanical specifications. Suitable only for legacy system maintenance or replacement applications.

Not Recommended (Compliance Issue):

CRCW1206499KFKTA (Vishay Dale): RoHS non-compliant status disqualifies this part for applications requiring ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q1: Can CRCW1206499KFKEAHP (0.75W) be used as a direct replacement for RCS3216F4993CS (0.25W)?

A: CRCW1206499KFKEAHP meets all electrical parameters (499 kOhms ±1%, ±100ppm/°C, -55°C to 155°C) and mechanical parameters (1206 package, 2 terminations, ROHS3 compliant). The higher power rating (0.75W vs 0.25W) provides additional thermal margin and pulse withstanding capability. This substitution is valid when the application circuit design permits the higher power rating. No circuit redesign is required; the part occupies the same PCB footprint.

Q2: What is the difference between automotive AEC-Q200 qualified parts and non-automotive parts in this list?

A: Automotive AEC-Q200 qualification indicates the part has undergone additional reliability testing per AEC-Q200 standard, including thermal cycling, moisture resistance, and failure rate validation. Parts with this qualification (AF1206FR-07499KL, AC1206FR-07499KL, CRCW1206499KFKEA, CRCW1206499KFKTA, ERJ-8ENF4993V, RMCF1206FT499K) are suitable for automotive and high-reliability industrial applications. Non-automotive qualified parts (RCS3216F4993CS, CHV1206-FX-4993ELF, CR1206-FX-4993ELF, RC1206FR-07499KL) are suitable for general industrial and consumer applications.

Q3: Why is ERJ-8ENF4993V marked "Not For New Designs"?

A: Product status "Not For New Designs" indicates the manufacturer has discontinued active development and recommends alternative parts for new circuit designs. This part remains available for existing system maintenance and replacement. For new designs, select from parts with "Active" product status.

Q4: Are all listed substitutes available in the same packaging options?

A: Packaging options vary among manufacturers. RCS3216F4993CS is supplied in standard packaging. Substitute parts are available in Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, or equivalent packaging. Verify specific packaging requirements with your procurement department before finalizing part selection.

Q5: What is the significance of MSL 1 (Unlimited) moisture sensitivity level?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed substitutes maintain MSL 1 rating, ensuring compatibility with standard warehouse and assembly processes without requiring dry-pack storage or baking procedures.

Q6: Can parts with different temperature coefficients be substituted?

A: All listed substitutes maintain ±100ppm/°C temperature coefficient matching the original RCS3216F4993CS specification. Temperature coefficient directly affects circuit performance across the operating temperature range. Substitution with different temperature coefficients is not permitted without circuit analysis and validation.

Q7: Which substitute offers the largest inventory availability?

A: RC1206FR-07499KL (YAGEO) offers the largest inventory with 1,484,497 pieces in stock, followed by CRCW1206499KFKEA (Vishay Dale) with 73,824 pieces. For high-volume production requirements, RC1206FR-07499KL provides optimal supply chain continuity.

Q8: Is the RCS3216F4993CS anti-sulfur feature critical for substitution?

A: Anti-sulfur and moisture-resistant features are application-dependent. The original part specifies both characteristics. Substitute parts offering these features (AF1206FR-07499KL, AC1206FR-07499KL, CR1206-FX-4993ELF, RC1206FR-07499KL) are preferred for applications in corrosive or high-humidity environments. Parts without explicit anti-sulfur designation (CHV1206-FX-4993ELF, CRCW1206499KFKEA, RMCF1206FT499K) remain electrically and mechanically equivalent for standard industrial applications.

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