RC3216F4993CS Equivalent & Substitute Parts Reference

Part Overview

The RC3216F4993CS is a 499 kOhms ±1% 0.25W thick film chip resistor manufactured by Samsung Electro-Mechanics in 1206 (3216 Metric) package format. This component is classified as Active product status with moisture-resistant construction, operating across -55°C to 155°C temperature range. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative sourcing improves supply chain resilience, or when application-specific features (such as automotive AEC-Q200 qualification or high-voltage construction) are required for enhanced reliability in specialized environments.

Key Parameters

Parameter	Value	Substitution Relevance
Resistance Value	499 kOhms	Critical - must match exactly
Tolerance	±1%	Critical - determines circuit accuracy
Power Rating	0.25W (1/4W)	Critical - thermal dissipation requirement
Package / Case	1206 (3216 Metric)	Critical - PCB footprint compatibility
Composition	Thick Film	Critical - electrical characteristics and temperature coefficient
Temperature Coefficient	±100ppm/°C	Important - frequency stability and drift characteristics
Operating Temperature Range	-55°C ~ 155°C	Important - environmental operating limits
RoHS Status	ROHS3 Compliant	Important - regulatory compliance requirement
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - handling and storage requirements
Number of Terminations	2	Critical - circuit connection points

Substitute Part Grouping Explanation

Substitution logic for the RC3216F4993CS is based strictly on the following allowable parameters:

Critical Matching Parameters (Non-Negotiable):

Resistance value: 499 kOhms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package: 1206 (3216 Metric)
Composition: Thick Film
Number of terminations: 2

Compatible Variation Parameters (Allowed Differences):

Manufacturer identity
Series designation
Packaging format (Tape & Reel, Cut Tape, Digi-Reel)
Product-specific features (Moisture Resistant, Automotive AEC-Q200, High Voltage, Anti-Sulfur)
Physical dimensions within 1206 package tolerance (length 0.122"-0.126", height 0.024"-0.030")
Temperature coefficient ±100ppm/°C (consistent across all parts)
Operating temperature range -55°C ~ 155°C (consistent across all parts)

Regulatory Compliance (Must Maintain):

ROHS3 Compliant status
MSL 1 (Unlimited) moisture sensitivity
REACH Unaffected status
EAR99 ECCN classification

Substitute parts are grouped into two categories: Direct Manufacturer Substitutes (functionally identical with no feature additions) and Similar Manufacturer Parts (functionally identical with specialized features for specific applications).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Op. Temp Range	Features	Product Status	RoHS
RC3216F4993CS	Samsung Electro-Mechanics	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Moisture Resistant	Active	ROHS3
CR1206-FX-4993ELF	Bourns Inc.	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Moisture Resistant	Active	ROHS3
ERJ-8ENF4993V	Panasonic Electronic Components	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Not For New Designs	ROHS3
RC1206FR-07499KL	YAGEO	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Moisture Resistant	Active	ROHS3
RCV1206499KFKEA	Vishay Dale	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	High Voltage	Active	ROHS3
RMCF1206FG499K	Stackpole Electronics Inc	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Active	ROHS3
AC1206FR-07499KL	YAGEO	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Moisture Resistant	Active	ROHS3
AF1206FR-07499KL	YAGEO	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Anti-Sulfur, Automotive AEC-Q200	Active	ROHS3
CHV1206-FX-4993ELF	Bourns Inc.	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	High Voltage	Active	ROHS3
CRCW1206499KFKEA	Vishay Dale	499 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Active	ROHS3
CRCW1206499KFKEAHP	Vishay Dale	499 kΩ	±1%	0.75	1206	Thick Film	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	Active	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent, Active Status):

CR1206-FX-4993ELF (Bourns Inc.) and RC1206FR-07499KL (YAGEO) are direct functional equivalents to the RC3216F4993CS with Active product status. Both maintain identical electrical specifications, package dimensions, and moisture-resistant construction. These parts are suitable for direct replacement in standard applications without design modification.

Automotive-Qualified Alternatives (AEC-Q200 Certified):

RMCF1206FG499K (Stackpole Electronics Inc), AC1206FR-07499KL (YAGEO), AF1206FR-07499KL (YAGEO), and CRCW1206499KFKEA (Vishay Dale) are all Active status parts with Automotive AEC-Q200 qualification. These components are appropriate for automotive and industrial applications requiring enhanced reliability screening and qualification documentation. The AF1206FR-07499KL variant includes anti-sulfur construction for corrosive environments.

Specialized Feature Variants:

RCV1206499KFKEA (Vishay Dale) and CHV1206-FX-4993ELF (Bourns Inc.) feature high-voltage construction and are suitable for applications requiring enhanced voltage stress tolerance. CRCW1206499KFKEAHP (Vishay Dale) provides 0.75W power rating with pulse-withstanding capability for transient-heavy circuits, though this represents a power rating increase beyond the original 0.25W specification.

Legacy Status Consideration:

ERJ-8ENF4993V (Panasonic Electronic Components) carries "Not For New Designs" product status. While functionally equivalent and currently in stock, this part should not be selected for new product development. Existing designs using this component may continue procurement, but migration to Active status alternatives is recommended for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC3216F4993CS with a part having different power rating?

A: No. The power rating of 0.25W (1/4W) is a critical parameter that determines thermal dissipation capability and circuit performance. Substitution with higher power ratings (such as 0.75W) changes the physical thermal characteristics and may alter circuit behavior. Lower power ratings are not acceptable as they cannot safely dissipate the required power. The exception is CRCW1206499KFKEAHP at 0.75W, which is only suitable if the application specifically requires increased power handling and the circuit design has been validated for this change.

Q: What is the difference between "Direct Manufacturer Substitutes" and "Similar Manufacturer Parts"?

A: Direct Manufacturer Substitutes (CR1206-FX-4993ELF, ERJ-8ENF4993V, RC1206FR-07499KL, RCV1206499KFKEA, RMCF1206FG499K) are functionally identical to the original part with no additional features. Similar Manufacturer Parts (AC1206FR-07499KL, AF1206FR-07499KL, CHV1206-FX-4993ELF, CRCW1206499KFKEA, CRCW1206499KFKEAHP) include specialized features such as Automotive AEC-Q200 qualification, High Voltage construction, Anti-Sulfur treatment, or Pulse Withstanding capability. Selection depends on whether the application requires these additional features.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, REACH Unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the original RC3216F4993CS.

Q: What packaging formats are available for these substitutes?

A: Substitute parts are available in three packaging formats: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel. The original RC3216F4993CS does not specify packaging format. Selection of packaging format depends on manufacturing process requirements (automated pick-and-place systems typically require Tape & Reel, while manual assembly may use Cut Tape). All formats contain electrically identical components.

Q: Can I use ERJ-8ENF4993V in a new design?

A: No. ERJ-8ENF4993V carries "Not For New Designs" product status, indicating the manufacturer has discontinued active development and support for this part. While currently in stock and functionally equivalent, this part should not be selected for new product development. Use Active status alternatives such as RMCF1206FG499K, AC1206FR-07499KL, or CRCW1206499KFKEA instead.

Q: What is the significance of the ±100ppm/°C temperature coefficient?

A: The ±100ppm/°C temperature coefficient indicates the resistance value will drift by up to 100 parts per million for each degree Celsius change in operating temperature. This specification is consistent across all substitute parts and determines frequency stability and long-term drift characteristics in temperature-sensitive applications. This parameter is not a substitution variable—all listed parts share identical temperature coefficient performance.

Q: Are there physical dimension differences between substitute parts?

A: Minor physical dimension variations exist within the 1206 package specification. Length ranges from 0.122" to 0.126" (3.10mm to 3.20mm) and seated height ranges from 0.024" to 0.030" (0.60mm to 0.75mm). These variations remain within 1206 package tolerance and do not affect PCB footprint compatibility. All parts are mechanically interchangeable on standard 1206 footprints.

Q: Which substitute should I select for automotive applications?

A: For automotive applications, select parts with Automotive AEC-Q200 qualification: RMCF1206FG499K (Stackpole), AC1206FR-07499KL (YAGEO), AF1206FR-07499KL (YAGEO with anti-sulfur), or CRCW1206499KFKEA (Vishay Dale). These parts have undergone automotive-specific reliability screening and qualification testing. The AF1206FR-07499KL variant is recommended for environments with sulfur contamination risk.

Q: What is the difference between Moisture Resistant and High Voltage construction?

A: Moisture Resistant construction (RC3216F4993CS, CR1206-FX-4993ELF, RC1206FR-07499KL, AC1206FR-07499KL, AF1206FR-07499KL) provides enhanced protection against humidity and moisture ingress, suitable for general industrial and consumer applications. High Voltage construction (RCV1206499KFKEA, CHV1206-FX-4993ELF) provides enhanced dielectric strength and voltage stress tolerance, suitable for high-voltage circuits and power supply applications. Selection depends on the specific environmental and electrical requirements of the application.

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