RC3216F121CS 120 Ohm 1% 1/4W 1206 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC3216F121CS is a 120 Ohms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as obsolete product status. The RC3216F121CS features moisture-resistant construction with a temperature coefficient of ±100ppm/°C and operates across the temperature range of -55°C to 155°C. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Resistance	120 Ohms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Composition	Thick Film
Package / Case	1206 (3216 Metric)
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution of the RC3216F121CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 120 Ohms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Moisture Sensitivity Level: 1 (Unlimited)
RoHS compliance: ROHS3 Compliant

All substitute parts listed meet these mandatory parameters. Substitute parts are grouped into three categories based on product status and additional features:

Upgrade Category: RCS3216F121CS (Samsung Electro-Mechanics) - Active status with anti-sulfur and moisture-resistant features.

Direct Substitutes (Active Status): CR1206-FX-1200ELF (Bourns Inc.), CRG1206F120R (TE Connectivity), RC1206FR-07120RL (YAGEO), and RMCF1206FT120R (Stackpole Electronics Inc.) provide direct functional equivalence with active product status.

Similar Substitutes (Active Status with Enhanced Features): AC1206FR-07120RL, AF1206FR-07120RL, CRCW1206120RFKEA, and CRCW1206120RFKEAC offer automotive AEC-Q200 certification or additional protective features while maintaining core electrical specifications.

Legacy Status: ERJ-8ENF1200V (Panasonic) carries "Not For New Designs" status but remains functionally equivalent with AEC-Q200 automotive qualification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Features	Product Status	RoHS
RC3216F121CS	Samsung Electro-Mechanics	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Moisture Resistant	Obsolete	ROHS3
RCS3216F121CS	Samsung Electro-Mechanics	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Anti-Sulfur, Moisture Resistant	Active	ROHS3
CR1206-FX-1200ELF	Bourns Inc.	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Moisture Resistant	Active	ROHS3
CRG1206F120R	TE Connectivity Passive Product	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	None specified	Active	ROHS3
ERJ-8ENF1200V	Panasonic Electronic Components	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	Not For New Designs	ROHS3
RC1206FR-07120RL	YAGEO	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Moisture Resistant	Active	ROHS3
RMCF1206FT120R	Stackpole Electronics Inc	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	Active	ROHS3
AC1206FR-07120RL	YAGEO	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200, Moisture Resistant	Active	ROHS3
AF1206FR-07120RL	YAGEO	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Anti-Sulfur, Automotive AEC-Q200	Active	ROHS3
CRCW1206120RFKEA	Vishay Dale	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	Automotive AEC-Q200	Active	ROHS3
CRCW1206120RFKEAC	Vishay Dale	120 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	None specified	Active	ROHS3

Engineering Selection Recommendations

For Standard Applications (Non-Automotive): Select CR1206-FX-1200ELF (Bourns Inc.), CRG1206F120R (TE Connectivity), or RC1206FR-07120RL (YAGEO). These parts maintain active product status, full ROHS3 compliance, and moisture-resistant construction equivalent to the original RC3216F121CS specification.

For Upgraded Performance: RCS3216F121CS (Samsung Electro-Mechanics) provides an upgrade path from the same manufacturer with active status and enhanced anti-sulfur protection while maintaining identical electrical and thermal specifications.

For Automotive Applications: RMCF1206FT120R (Stackpole Electronics Inc.), AC1206FR-07120RL (YAGEO), AF1206FR-07120RL (YAGEO), or CRCW1206120RFKEA (Vishay Dale) are qualified to AEC-Q200 automotive standards with active product status. AF1206FR-07120RL adds anti-sulfur protection for enhanced reliability in corrosive environments.

Avoid for New Designs: ERJ-8ENF1200V (Panasonic) carries "Not For New Designs" status and should be used only for legacy system maintenance or repair applications where existing inventory must be maintained.

Compliance Verification: All listed substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and identical operating temperature range (-55°C to 155°C). All parts are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can RC3216F121CS be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts meet the mandatory electrical and mechanical parameters: 120 Ohms ±1% resistance, 0.25W power rating, 1206 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, and ROHS3 compliance. Physical dimensions vary slightly within acceptable tolerances for 1206 package specifications.

Q: What is the difference between the main part and RCS3216F121CS?

A: RCS3216F121CS is the active product upgrade from Samsung Electro-Mechanics. It maintains identical electrical specifications but adds anti-sulfur protection and carries active product status, making it the preferred replacement when sourcing from Samsung.

Q: Are automotive-qualified parts (AEC-Q200) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts exceed standard industrial requirements and are fully compatible with non-automotive applications. They provide enhanced reliability margins at no functional disadvantage.

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

A: Substitute parts are supplied in Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) formats. CR1206-FX-1200ELF, RC1206FR-07120RL, and CRCW1206120RFKEA use Cut Tape & Digi-Reel®. CRG1206F120R, ERJ-8ENF1200V, RMCF1206FT120R, AC1206FR-07120RL, AF1206FR-07120RL, and CRCW1206120RFKEAC use Tape & Reel packaging.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within the 1206 package standard. Length ranges from 0.120" to 0.126" (3.05mm to 3.20mm), width from 0.061" to 0.063" (1.55mm to 1.60mm), and height from 0.024" to 0.030" (0.60mm to 0.75mm). These variations are within standard PCB footprint tolerances and do not affect interchangeability.

Q: Why is ERJ-8ENF1200V marked "Not For New Designs"?

A: This designation indicates the manufacturer (Panasonic) has transitioned this product line and recommends alternative parts for new development. However, the part remains functionally equivalent and suitable for legacy system support or repair applications.

Q: What inventory levels are available for these substitute parts?

A: Current inventory levels vary: CR1206-FX-1200ELF (141,149 pcs), RC1206FR-07120RL (100,780 pcs), ERJ-8ENF1200V (70,231 pcs), RMCF1206FT120R (69,286 pcs), CRCW1206120RFKEA (38,755 pcs), CRG1206F120R (34,695 pcs), AC1206FR-07120RL (52,168 pcs), CRCW1206120RFKEAC (10,400 pcs), RCS3216F121CS (1,076 pcs), and AF1206FR-07120RL (767 pcs).

Q: Do all substitute parts have unlimited moisture sensitivity?

A: Yes. All substitute parts, including the original RC3216F121CS, are classified as Moisture Sensitivity Level 1 (Unlimited), indicating no moisture precautions are required during storage, handling, or assembly.

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