RC3216F4992CS Equivalent & Substitute Parts Reference

Part Overview

The RC3216F4992CS is a 49.9 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 and operates across the temperature range of -55°C to 155°C. The part is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size and form factor), and environmental performance characteristics. Alternative sources provide design flexibility, supply chain redundancy, and access to components with enhanced certifications such as automotive AEC-Q200 qualification.

Key Parameters

Parameter	Value	Specification Basis
Resistance	49.9 kOhms	Exact match required for electrical function
Tolerance	±1%	Precision specification for circuit performance
Power Rating	0.25W (1/4W)	Thermal dissipation capability
Package / Case	1206 (3216 Metric)	Physical footprint and PCB compatibility
Composition	Thick Film	Manufacturing technology and performance characteristics
Temperature Coefficient	±100ppm/°C	Resistance stability over temperature range
Operating Temperature	-55°C to 155°C	Environmental operating limits
Terminations	2	Standard two-terminal resistor configuration
RoHS Status	ROHS3 Compliant	Regulatory compliance requirement
MSL Rating	1 (Unlimited)	Moisture sensitivity and storage conditions

Substitute Part Grouping Explanation

Substitute parts for the RC3216F4992CS are classified into three categories based on functional equivalence and application suitability:

Direct Equivalents maintain identical electrical and mechanical specifications with standard industrial-grade construction. These parts satisfy general-purpose applications requiring no specialized certifications beyond RoHS compliance.

Upgrade Options provide enhanced performance through automotive AEC-Q200 qualification, suitable for applications requiring automotive-grade reliability and extended environmental testing. These parts are electrically and mechanically interchangeable with the main part while offering superior quality assurance.

Alternative Sources offer the same core specifications through different manufacturers, providing supply chain flexibility and cost optimization while maintaining full functional compatibility.

Substitution is valid when the following parameters match or exceed the main part specifications:

Resistance value: 49.9 kOhms (exact)
Tolerance: ±1% (exact)
Power rating: 0.25W minimum (equal or higher acceptable)
Package: 1206 (3216 Metric) (exact)
Temperature coefficient: ±100ppm/°C (exact)
Operating temperature range: -55°C to 155°C minimum (equal or wider acceptable)
Composition: Thick Film (exact)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	RoHS Status	AEC-Q200	Product Status
RC3216F4992CS	Samsung Electro-Mechanics	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	No	Active
CR1206-FX-4992ELF	Bourns Inc.	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	No	Active
RC1206FR-0749K9L	YAGEO	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	No	Active
AC1206FR-0749K9L	YAGEO	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Yes	Active
CRCW120649K9FKEA	Vishay Dale	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Yes	Active
CRCW120649K9FKEAHP	Vishay Dale	49.9 kΩ	±1%	0.75	1206	±100ppm/°C	-55 to 155°C	ROHS3	Yes	Active
CRCW120649K9FKTA	Vishay Dale	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	RoHS Non-compliant	Yes	Active
ERJ-8ENF4992V	Panasonic Electronic Components	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Yes	Not For New Designs
RMCF1206FT49K9	Stackpole Electronics Inc	49.9 kΩ	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Yes	Active

Engineering Selection Recommendations

For Standard Industrial Applications: Select CR1206-FX-4992ELF (Bourns Inc.) or RC1206FR-0749K9L (YAGEO) as direct equivalents. Both parts maintain identical specifications to the main part with Active product status and full ROHS3 compliance. These options provide immediate substitution capability with established supply availability.

For Automotive and High-Reliability Applications: Select AC1206FR-0749K9L (YAGEO), CRCW120649K9FKEA (Vishay Dale), or RMCF1206FT49K9 (Stackpole Electronics Inc.) for designs requiring AEC-Q200 automotive qualification. These parts are electrically and mechanically equivalent to the main part while providing enhanced quality assurance through automotive-grade testing and certification. All three maintain Active product status and ROHS3 compliance.

For Elevated Power Dissipation Requirements: Select CRCW120649K9FKEAHP (Vishay Dale) when thermal performance exceeds 0.25W specifications. This part provides 0.75W power rating in the same 1206 package footprint with AEC-Q200 qualification, enabling higher current applications while maintaining all other electrical parameters.

Parts to Avoid for New Designs: ERJ-8ENF4992V (Panasonic Electronic Components) carries "Not For New Designs" status and should not be selected for new product development, despite meeting all electrical and mechanical specifications.

Regulatory Compliance Consideration: CRCW120649K9FKTA (Vishay Dale) is RoHS non-compliant and REACH-affected. This part is suitable only for applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC3216F4992CS with any of the listed equivalent parts without circuit redesign?

A: Yes. All listed substitute parts maintain identical resistance value (49.9 kOhms), tolerance (±1%), power rating (0.25W minimum), package format (1206), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Direct substitution is valid at the component level without circuit modification.

Q: What is the difference between "Direct Equivalent" and "Upgrade" substitute parts?

A: Direct equivalent parts (CR1206-FX-4992ELF, RC1206FR-0749K9L) provide identical specifications without automotive certification. Upgrade parts (AC1206FR-0749K9L, CRCW120649K9FKEA, RMCF1206FT49K9) include AEC-Q200 automotive qualification, indicating enhanced reliability testing and quality assurance suitable for automotive and mission-critical applications. Electrical and mechanical performance are equivalent; the difference is in certification level.

Q: Is the CRCW120649K9FKEAHP (0.75W variant) a true substitute for the 0.25W main part?

A: Yes, for applications where the main part's 0.25W rating is sufficient. The 0.75W variant provides higher thermal capability in the same physical package, making it suitable for circuits with higher current demands. The higher power rating does not degrade performance in lower-power applications. However, verify that the increased thermal output does not affect adjacent components or PCB thermal management.

Q: Why is ERJ-8ENF4992V marked "Not For New Designs"?

A: This designation indicates that Panasonic has discontinued active development and marketing of this part for new applications. While the part meets all electrical and mechanical specifications and remains in inventory, it should not be selected for new product designs. Use alternative sources such as RMCF1206FT49K9 or CRCW120649K9FKEA instead.

Q: Can I use CRCW120649K9FKTA in a design requiring RoHS compliance?

A: No. CRCW120649K9FKTA is explicitly marked as RoHS non-compliant and REACH-affected. This part is suitable only for applications where RoHS compliance is not a requirement. For RoHS-compliant designs, select from the ROHS3-compliant alternatives listed in the parameter comparison table.

Q: What packaging formats are available for these substitute parts?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. CR1206-FX-4992ELF, AC1206FR-0749K9L, CRCW120649K9FKEA, CRCW120649K9FKTA, ERJ-8ENF4992V, and RMCF1206FT49K9 are supplied in Tape & Reel format suitable for automated assembly. RC1206FR-0749K9L is available in Cut Tape & Digi-Reel® format. Verify packaging compatibility with your procurement and assembly processes.

Q: Are there dimensional differences between substitute parts that affect PCB layout?

A: All parts use the 1206 (3216 Metric) package with identical length (0.122" to 0.126") and width (0.063"). Height variations range from 0.024" to 0.030" (0.60mm to 0.75mm). These minor height differences do not affect PCB layout or component placement. Verify height clearance only if the application has strict vertical space constraints.

Q: What is the moisture sensitivity level (MSL) for all substitute parts?

A: All listed substitute parts carry MSL 1 (Unlimited) rating, identical to the main part. This indicates unlimited shelf life under normal storage conditions without special moisture control requirements. No desiccant storage or baking procedures are necessary before assembly.

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