RCS3216F4991CS Equivalent & Substitute Parts Reference

Part Overview

The RCS3216F4991CS is a 4.99 kOhms ±1% 0.25W (1/4W) thick film chip resistor manufactured by Samsung Electro-Mechanics in 1206 (3216 Metric) package format. This component features anti-sulfur and moisture-resistant construction, operating across -55°C to 155°C with a temperature coefficient of ±100ppm/°C. The part maintains Active product status with 956 units in current inventory. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental performance characteristics to ensure direct functional interchangeability in circuit applications.

Key Parameters

Parameter	Specification
Resistance Value	4.99 kOhms
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
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RCS3216F4991CS is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

Resistance value: 4.99 kOhms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2

Secondary Compliance Criteria:

RoHS3 compliance status
Moisture Sensitivity Level (MSL): 1
REACH and ECCN classifications

All identified substitute parts meet these core electrical and mechanical requirements. Variations in physical dimensions (length, width, height) within acceptable tolerances, packaging format (Tape & Reel vs. Cut Tape), and optional certifications (such as AEC-Q200 automotive qualification) do not affect functional interchangeability in standard applications.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp (°C)	RoHS Status	MSL	Product Status	Inventory (Pcs)
RCS3216F4991CS	Samsung Electro-Mechanics	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	956
AC1206FR-074K99L	YAGEO	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	8929
CR1206-FX-4991ELF	Bourns Inc.	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	79753
CRCW12064K99FKEA	Vishay Dale	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	68193
CRCW12064K99FKTA	Vishay Dale	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	RoHS NC	1	Active	27911
RC1206FR-074K99L	YAGEO	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	62095
RMCF1206FT4K99	Stackpole Electronics Inc	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	92992
ERJ-8ENF4991V	Panasonic Electronic Components	4.99 kΩ	±1%	0.25	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Not For New Designs	16061
CRCW12064K99FKEAHP	Vishay Dale	4.99 kΩ	±1%	0.75	1206	±100ppm/°C	-55 ~ 155	ROHS3	1	Active	48506

Engineering Selection Recommendations

Preferred Substitutes (Active Status, ROHS3 Compliant):

The following parts are recommended for new designs and applications requiring full compliance with current environmental standards:

CR1206-FX-4991ELF (Bourns Inc.): Highest inventory availability (79,753 units). Active product status. ROHS3 compliant. Suitable for general-purpose applications.
RMCF1206FT4K99 (Stackpole Electronics Inc): High inventory (92,992 units). Active product status. ROHS3 compliant. AEC-Q200 automotive qualification available.
CRCW12064K99FKEA (Vishay Dale): Substantial inventory (68,193 units). Active product status. ROHS3 compliant. AEC-Q200 automotive qualification.
AC1206FR-074K99L (YAGEO): Good inventory (8,929 units). Active product status. ROHS3 compliant. AEC-Q200 automotive qualification.
RC1206FR-074K99L (YAGEO): Adequate inventory (62,095 units). Active product status. ROHS3 compliant. Cut Tape packaging option.

Conditional Substitutes:

CRCW12064K99FKTA (Vishay Dale): 27,911 units available. Active status. RoHS non-compliant and REACH affected. Use only in applications where RoHS3 compliance is not required.
ERJ-8ENF4991V (Panasonic Electronic Components): 16,061 units available. Marked "Not For New Designs." Use only for legacy system maintenance or replacement applications.

Alternative Power Rating:

CRCW12064K99FKEAHP (Vishay Dale): 0.75W (3/4W) power rating. Use only when higher power dissipation capability is required. Not a direct substitute for 0.25W applications.

Frequently Asked Questions (FAQ)

Q1: Can I use CRCW12064K99FKEAHP as a direct replacement for RCS3216F4991CS?

A: CRCW12064K99FKEAHP has a 0.75W power rating versus the 0.25W specification of RCS3216F4991CS. While electrically compatible in terms of resistance and tolerance, the higher power rating makes it unsuitable as a direct substitute in circuits designed for 0.25W components. Use only when higher power dissipation is required.

Q2: What is the difference between AC1206FR-074K99L and RC1206FR-074K99L?

A: Both are YAGEO products with identical electrical specifications (4.99 kΩ, ±1%, 0.25W, 1206 package). AC1206FR-074K99L includes AEC-Q200 automotive qualification. RC1206FR-074K99L is the standard industrial version. Selection depends on application requirements.

Q3: Is CRCW12064K99FKTA suitable for RoHS3-compliant applications?

A: No. CRCW12064K99FKTA is marked as RoHS non-compliant and REACH affected. Use only in applications where RoHS3 compliance is not mandated.

Q4: Why is ERJ-8ENF4991V marked "Not For New Designs"?

A: ERJ-8ENF4991V is a legacy product from Panasonic. While functionally equivalent and currently in inventory, it is not recommended for new circuit designs. Use only for maintenance or replacement of existing systems.

Q5: Do all substitute parts fit the same PCB footprint?

A: All substitute parts use the 1206 (3216 Metric) package. Physical dimensions vary slightly (length: 3.10mm to 3.20mm; height: 0.60mm to 0.75mm). These variations are within standard PCB design tolerances and do not affect mechanical fit or electrical performance.

Q6: Which substitute offers the best inventory availability?

A: CR1206-FX-4991ELF (Bourns Inc.) offers the highest inventory with 79,753 units in stock, followed by RMCF1206FT4K99 (Stackpole Electronics Inc.) with 92,992 units.

Q7: Are all substitutes suitable for automotive applications?

A: AC1206FR-074K99L, CRCW12064K99FKEA, CRCW12064K99FKTA, CRCW12064K99FKEAHP, RMCF1206FT4K99, and ERJ-8ENF4991V carry AEC-Q200 automotive qualification. CR1206-FX-4991ELF and RC1206FR-074K99L do not list AEC-Q200 certification.

Q8: What packaging formats are available?

A: Tape & Reel (TR) is the standard packaging for most substitutes. RC1206FR-074K99L and CRCW12064K99FKTA offer Cut Tape (CT) & Digi-Reel® options for smaller quantity requirements.

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