RC3216F6491CS Equivalent & Substitute Parts Reference

Part Overview

The RC3216F6491CS is a 6.49 kOhms ±1% 0.25W chip resistor in 1206 (3216 Metric) package manufactured by Samsung Electro-Mechanics. This thick film, moisture-resistant component operates across -55°C to 155°C and is ROHS3 compliant with MSL 1 rating. The part is currently active in production. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when design requirements necessitate alternative qualified sources.

Key Parameters

Parameter	Value	Criticality for Substitution
Resistance Value	6.49 kOhms	Critical - Must Match Exactly
Tolerance	±1%	Critical - Must Match Exactly
Power Rating	0.25W (1/4W)	Critical - Minimum Requirement
Package / Case	1206 (3216 Metric)	Critical - Must Match Exactly
Composition	Thick Film	Critical - Electrical Characteristics
Temperature Coefficient	±100ppm/°C	Critical - Stability Requirement
Operating Temperature Range	-55°C ~ 155°C	Critical - Environmental Specification
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - Handling & Storage
RoHS Status	ROHS3 Compliant	Important - Regulatory Compliance
Number of Terminations	2	Critical - Functional Requirement

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match the main part RC3216F6491CS for direct substitution:

Mandatory Matching Parameters:

Resistance value: 6.49 kOhms
Tolerance: ±1%
Package: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2
RoHS compliance: ROHS3

Acceptable Variation Parameters:

Power rating: Equal to or greater than 0.25W
Physical dimensions: Minor variations within 1206 package specification
Height seated: Variations acceptable within package tolerance
Moisture resistance: Equal or enhanced features acceptable
Automotive qualification (AEC-Q200): Enhancement acceptable for non-automotive applications

Substitute parts are classified into three categories:

Direct Equivalents: Parts meeting all mandatory parameters with identical power rating (0.25W).

Upgrade Substitutes: Parts meeting all mandatory parameters with enhanced features (automotive AEC-Q200 qualification) at identical power rating.

Similar Substitutes: Parts meeting all mandatory parameters with either enhanced power rating (0.75W) or enhanced automotive qualification, suitable when design margins permit.

Parameter Comparison

Manufacturer	Part Number	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Composition	Features	Product Status	Inventory (Pcs)
Samsung Electro-Mechanics	RC3216F6491CS	6.49 kΩ	±1%	0.25	1206	±100ppm/°C	-55~155°C	Thick Film	Moisture Resistant	Active	859
Bourns Inc.	CR1206-FX-6491ELF	6.49 kΩ	±1%	0.25	1206	±100ppm/°C	-55~155°C	Thick Film	Moisture Resistant	Active	25447
YAGEO	RC1206FR-076K49L	6.49 kΩ	±1%	0.25	1206	±100ppm/°C	-55~155°C	Thick Film	Moisture Resistant	Active	106229
YAGEO	AC1206FR-076K49L	6.49 kΩ	±1%	0.25	1206	±100ppm/°C	-55~155°C	Thick Film	Automotive AEC-Q200, Moisture Resistant	Active	10678
Vishay Dale	CRCW12066K49FKEA	6.49 kΩ	±1%	0.25	1206	±100ppm/°C	-55~155°C	Thick Film	Automotive AEC-Q200	Active	30225
Vishay Dale	CRCW12066K49FKEAHP	6.49 kΩ	±1%	0.75	1206	±100ppm/°C	-55~155°C	Thick Film	Automotive AEC-Q200, Pulse Withstanding	Active	6280
Panasonic Electronic Components	ERJ-8ENF6491V	6.49 kΩ	±1%	0.25	1206	±100ppm/°C	-55~155°C	Thick Film	Automotive AEC-Q200	Not For New Designs	51138

Engineering Selection Recommendations

For Direct Substitution (Identical Specifications):

CR1206-FX-6491ELF (Bourns Inc.) and RC1206FR-076K49L (YAGEO) are direct functional equivalents meeting all mandatory parameters. Both parts are in active production status. RC1206FR-076K49L offers significantly higher inventory availability (106,229 pcs) compared to CR1206-FX-6491ELF (25,447 pcs), supporting supply chain continuity.

For Upgraded Applications (Automotive Qualification):

AC1206FR-076K49L (YAGEO) and CRCW12066K49FKEA (Vishay Dale) provide identical electrical specifications with AEC-Q200 automotive qualification. These parts are suitable for applications requiring automotive-grade reliability without increasing power dissipation requirements. Both are in active production.

For Enhanced Power Margin Applications:

CRCW12066K49FKEAHP (Vishay Dale) provides 0.75W power rating with AEC-Q200 qualification and pulse withstanding capability. This part is suitable when design margins require higher power handling or when transient pulse conditions are present. Product status is active.

For Legacy System Support:

ERJ-8ENF6491V (Panasonic Electronic Components) maintains functional equivalence with AEC-Q200 qualification but carries "Not For New Designs" status. This part is suitable only for sustaining production of existing designs and should not be selected for new development.

Compliance Verification:

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status identical to the main part. No regulatory or environmental compliance barriers exist for any listed substitute.

Frequently Asked Questions (FAQ)

Q1: Can CR1206-FX-6491ELF replace RC3216F6491CS directly in production?

A: Yes. CR1206-FX-6491ELF meets all mandatory electrical and mechanical parameters: 6.49 kOhms ±1%, 0.25W, 1206 package, thick film composition, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Both are ROHS3 compliant with MSL 1 rating. No design changes are required.

Q2: What is the difference between RC1206FR-076K49L and AC1206FR-076K49L?

A: Both are YAGEO products with identical electrical specifications (6.49 kOhms ±1%, 0.25W, 1206 package). AC1206FR-076K49L includes AEC-Q200 automotive qualification and moisture resistance features. AC1206FR-076K49L is suitable for automotive applications or designs requiring enhanced reliability qualification. RC1206FR-076K49L is suitable for general industrial applications.

Q3: Why is CRCW12066K49FKEAHP listed as a substitute if it has 0.75W power rating?

A: CRCW12066K49FKEAHP meets all mandatory electrical parameters and package requirements. The 0.75W rating exceeds the 0.25W requirement, providing additional design margin. This part is suitable for applications where higher power dissipation capability is beneficial or where transient pulse conditions exist. The higher power rating does not prevent substitution in circuits designed for 0.25W components.

Q4: Can ERJ-8ENF6491V be used in new product designs?

A: No. ERJ-8ENF6491V carries "Not For New Designs" product status. This part is restricted to sustaining production of existing designs only. For new product development, select from parts with "Active" status: CR1206-FX-6491ELF, RC1206FR-076K49L, AC1206FR-076K49L, CRCW12066K49FKEA, or CRCW12066K49FKEAHP.

Q5: Are there physical dimension differences between substitute parts?

A: Minor variations exist within 1206 package tolerance. Length ranges from 0.122" to 0.126" (3.10mm to 3.20mm), and height seated ranges from 0.024" to 0.030" (0.60mm to 0.75mm). All variations remain within standard 1206 package specification. PCB footprints designed for 1206 package accommodate all listed substitutes without modification.

Q6: Which substitute part offers the best inventory availability?

A: RC1206FR-076K49L (YAGEO) provides the highest inventory level at 106,229 pcs. This part is recommended when supply chain continuity and procurement speed are priorities, provided automotive qualification is not required.

Q7: Do all substitute parts have identical moisture sensitivity levels?

A: Yes. All listed parts, including the main part RC3216F6491CS, carry MSL 1 (Unlimited) rating. No differences exist in moisture sensitivity handling or storage requirements across all parts in this substitution list.

Q8: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. HTSUS code 8533.21.0030 applies uniformly. No compliance barriers exist for any substitution combination.

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