RCS3216F394CS 390kΩ 1% 1/4W 1206 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RCS3216F394CS is a 390 kΩ thick film chip resistor manufactured by Samsung Electro-Mechanics in the 1206 (3216 metric) package format. This component is rated for 0.25W (1/4W) power dissipation with ±1% tolerance and operates across the temperature range of -55°C to 155°C. The part features anti-sulfur and moisture-resistant construction, making it suitable for general industrial and consumer electronics applications.

The RCS3216F394CS maintains Active product status with 926 units currently in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical package compatibility, and environmental performance characteristics. Substitute components enable design flexibility, supply chain optimization, and alternative sourcing when the primary part becomes unavailable.

Key Parameters

Parameter	Specification
Resistance Value	390 kΩ
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±100 ppm/°C
Operating Temperature Range	-55°C to 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RCS3216F394CS is determined by strict alignment with the following core parameters:

Mandatory Matching Parameters:

Resistance Value: 390 kΩ
Tolerance: ±1%
Package / Case: 1206 (3216 Metric)
Composition: Thick Film
Temperature Coefficient: ±100 ppm/°C
Operating Temperature Range: -55°C to 155°C
Number of Terminations: 2
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Power Rating Consideration: Substitute parts are grouped into two categories based on power rating:

Category A - Direct Equivalents (0.25W / 1/4W): Parts with identical 0.25W power rating provide direct functional replacement with no circuit design modifications required.

Category B - Higher Power Rating (0.75W / 3/4W): Parts with elevated power ratings (0.75W) are electrically compatible and mechanically interchangeable but provide enhanced thermal performance. These are suitable for applications requiring additional power dissipation margin.

All identified substitute parts maintain identical resistance, tolerance, package dimensions, temperature performance, and compliance certifications as the RCS3216F394CS.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Temp Range	Features	Product Status	RoHS
RCS3216F394CS	Samsung Electro-Mechanics	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Anti-Sulfur, Moisture Resistant	Active	ROHS3
AC1206FR-07390KL	YAGEO	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200, Moisture Resistant	Active	ROHS3
CR1206-FX-3903ELF	Bourns Inc.	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3
CRCW1206390KFKEA	Vishay Dale	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Active	ROHS3
CRCW1206390KFKEAHP	Vishay Dale	390 kΩ	±1%	0.75W	1206	±100 ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200, Pulse Withstanding	Active	ROHS3
ERJ-8ENF3903V	Panasonic Electronic Components	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200	Not For New Designs	ROHS3
KTR18EZPF3903	Rohm Semiconductor	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Automotive AEC-Q200, High Voltage	Active	ROHS3
RC1206FR-07390KL	YAGEO	390 kΩ	±1%	0.25W	1206	±100 ppm/°C	-55°C ~ 155°C	Moisture Resistant	Active	ROHS3

Engineering Selection Recommendations

For New Designs: Select from parts with Active product status: AC1206FR-07390KL, CR1206-FX-3903ELF, CRCW1206390KFKEA, CRCW1206390KFKEAHP, KTR18EZPF3903, or RC1206FR-07390KL. These components ensure long-term availability and manufacturer support.

For Automotive Applications: Parts carrying AEC-Q200 automotive qualification (AC1206FR-07390KL, CRCW1206390KFKEA, CRCW1206390KFKEAHP, ERJ-8ENF3903V, KTR18EZPF3903) are suitable for automotive-grade circuit designs requiring enhanced reliability and temperature cycling performance.

For Enhanced Power Dissipation: The CRCW1206390KFKEAHP variant provides 0.75W power rating with pulse withstanding capability, enabling use in circuits requiring higher thermal margins or transient pulse handling compared to standard 0.25W ratings.

For Existing Designs: The RCS3216F394CS, CR1206-FX-3903ELF, and RC1206FR-07390KL provide direct functional equivalence without design modification. These parts share identical electrical and mechanical specifications with the primary component.

Avoid for New Designs: ERJ-8ENF3903V carries "Not For New Designs" status and should be used only for legacy design maintenance or existing production continuity.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RCS3216F394CS with any of the listed parts without circuit modification?

A: Yes, all listed substitute parts with 0.25W power rating (AC1206FR-07390KL, CR1206-FX-3903ELF, CRCW1206390KFKEA, ERJ-8ENF3903V, KTR18EZPF3903, RC1206FR-07390KL) are direct electrical and mechanical equivalents. The CRCW1206390KFKEAHP (0.75W variant) is also mechanically and electrically compatible but provides additional power dissipation capability.

Q: What is the difference between 0.25W and 0.75W rated parts?

A: Power rating indicates maximum continuous power dissipation capability. The 0.75W variant (CRCW1206390KFKEAHP) can safely dissipate three times more power than the 0.25W standard rating. In circuits operating below 0.25W, both ratings perform identically. The higher rating provides thermal margin for applications with elevated power dissipation or transient pulse conditions.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts carry ROHS3 compliance certification, matching the RCS3216F394CS environmental standard.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive electronics qualification standard requiring enhanced reliability testing, temperature cycling performance, and failure rate documentation. Parts carrying this certification (AC1206FR-07390KL, CRCW1206390KFKEA, CRCW1206390KFKEAHP, ERJ-8ENF3903V, KTR18EZPF3903) are suitable for automotive applications but are equally suitable for general industrial and consumer applications.

Q: Can I use ERJ-8ENF3903V in new product designs?

A: No. ERJ-8ENF3903V carries "Not For New Designs" product status, indicating the manufacturer has discontinued active development and support. This part is suitable only for maintaining existing production or legacy designs. For new designs, select from parts with Active status.

Q: Are there dimensional differences between substitute parts?

A: All parts use the 1206 (3216 metric) package with minor dimensional variations within standard tolerances. Length ranges from 3.10mm to 3.20mm, width is 1.60mm, and height ranges from 0.60mm to 0.75mm. These variations are within PCB design tolerances and do not affect interchangeability.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. All listed parts carry MSL 1 rating, requiring no special moisture-control storage or handling procedures.

Q: Which substitute part has the highest inventory availability?

A: RC1206FR-07390KL (YAGEO) has the highest inventory with 817,251 units in stock, followed by CR1206-FX-3903ELF (Bourns) with 69,084 units.

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