RCS3216F6653CS Equivalent & Substitute Parts Reference

Part Overview

The RCS3216F6653CS is a 665 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Samsung Electro-Mechanics. This component features anti-sulfur and moisture-resistant properties, operating across -55°C to 155°C with a temperature coefficient of ±100ppm/°C. The part maintains Active product status with 890 pieces currently in stock. Equivalent and substitute parts are identified based on matching electrical specifications, package dimensions, and compliance certifications to ensure direct functional interchangeability in circuit applications.

Key Parameters

Parameter	Value
Resistance	665 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RCS3216F6653CS are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Resistance value: 665 kOhms
Tolerance: ±1%
Package: 1206 (3216 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature: -55°C ~ 155°C
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Grouping Logic:

Group 1 - Direct Equivalents (0.25W Rating): Parts matching all electrical specifications and 0.25W power rating with identical package dimensions and compliance certifications.

Group 2 - Higher Power Rating Variant (0.75W Rating): Parts with identical electrical specifications but elevated power rating, suitable for applications requiring enhanced pulse withstanding capability while maintaining package compatibility.

Group 3 - Legacy/Restricted Status: Parts meeting all electrical and mechanical specifications but with product status restrictions limiting new design applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Temp Coeff	Operating Temp	Product Status	RoHS Status	MSL
RCS3216F6653CS	Samsung Electro-Mechanics	665 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	1
CRCW1206665KFKEA	Vishay Dale	665 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	1
CRCW1206665KFKEAHP	Vishay Dale	665 kOhms	±1%	0.75W	1206	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	1
ERJ-8ENF6653V	Panasonic Electronic Components	665 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	Not For New Designs	ROHS3	1
RC1206FR-07665KL	YAGEO	665 kOhms	±1%	0.25W	1206	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	1

Engineering Selection Recommendations

Primary Substitutes (Active Status, Direct Equivalents):

CRCW1206665KFKEA (Vishay Dale) and RC1206FR-07665KL (YAGEO) are direct functional equivalents to the RCS3216F6653CS. Both parts maintain identical electrical specifications, 0.25W power rating, 1206 package configuration, and ROHS3 compliance. CRCW1206665KFKEA includes automotive AEC-Q200 certification. RC1206FR-07665KL provides moisture-resistant thick film construction. Both are in Active product status with substantial inventory availability (16,037 and 35,323 pieces respectively).

Higher Power Rating Alternative:

CRCW1206665KFKEAHP (Vishay Dale) provides a 0.75W power rating variant while maintaining all other electrical and mechanical specifications. This part is suitable for applications requiring enhanced pulse withstanding capability. It retains Active product status and AEC-Q200 automotive certification. The package dimensions remain compatible with 1206 footprints.

Legacy Component (Restricted for New Designs):

ERJ-8ENF6653V (Panasonic Electronic Components) meets all electrical and mechanical specifications with 0.25W power rating and AEC-Q200 certification. However, this part carries "Not For New Designs" product status, restricting its use to legacy system maintenance and repair applications only.

Compliance Verification:

All listed substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited moisture sensitivity), and identical operating temperature ranges (-55°C ~ 155°C). Selection should prioritize Active status parts for new design implementations.

Frequently Asked Questions (FAQ)

Q: Can CRCW1206665KFKEAHP (0.75W) directly replace RCS3216F6653CS (0.25W)?

A: Yes, within the constraints of circuit design. The 0.75W part is mechanically and electrically compatible with identical resistance, tolerance, and package specifications. The higher power rating provides additional thermal margin and pulse withstanding capability. Circuit thermal analysis must confirm that the 0.25W design margin is not a critical constraint.

Q: What is the difference between CRCW1206665KFKEA and RC1206FR-07665KL?

A: Both are 0.25W direct equivalents with identical electrical specifications and 1206 package. CRCW1206665KFKEA includes automotive AEC-Q200 certification and is supplied in Tape & Reel packaging. RC1206FR-07665KL features moisture-resistant thick film construction and is also supplied in Tape & Reel. Selection depends on application requirements and supply chain availability.

Q: Why is ERJ-8ENF6653V marked "Not For New Designs"?

A: This product status indicates that Panasonic has discontinued active development and recommends alternative parts for new circuit designs. The part remains available for existing system support and legacy applications. New designs should utilize Active status alternatives such as CRCW1206665KFKEA or RC1206FR-07665KL.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the original RCS3216F6653CS specification. This ensures regulatory compliance across all alternatives.

Q: What is the significance of MSL Level 1 rating?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture bake-out requirements. All listed parts share this rating, eliminating moisture handling constraints during storage and assembly.

Q: Can I mix manufacturers in a single production run?

A: Yes. All substitute parts meet identical electrical specifications, tolerance, package dimensions, and compliance certifications. Multi-source procurement is supported from Samsung Electro-Mechanics, Vishay Dale, Panasonic, and YAGEO without functional impact.

Q: What are the physical dimension differences between substitutes?

A: Length varies slightly: RCS3216F6653CS and ERJ-8ENF6653V measure 0.126" (3.20mm), while CRCW1206665KFKEA and RC1206FR-07665KL measure 0.122" (3.10mm). CRCW1206665KFKEAHP measures 0.122" (3.10mm). All heights remain within 0.024" to 0.028" (0.60mm to 0.70mm). These variations are within standard 1206 package tolerances and do not affect PCB footprint compatibility.

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