RC3216F3921CS 3.92kΩ 1% 1/4W 1206 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC3216F3921CS is a 3.92 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) surface mount package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with 958 pieces currently in stock inventory. The part is designed for general-purpose applications requiring moisture-resistant thick film construction with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain constraints require alternative sourcing, or when design specifications allow for functionally equivalent components from different manufacturers that meet identical electrical and mechanical parameters.

Key Parameters

Parameter	Value
Resistance	3.92 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

Substitution eligibility for the RC3216F3921CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 3.92 kOhms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package type: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

All substitute parts listed meet these mandatory parameters. Variations in physical dimensions (length, width, height) within the 1206 package specification, packaging format (Tape & Reel vs. Cut Tape), and manufacturer-specific series designations do not affect functional substitutability. Product status differences (Active vs. Not For New Designs vs. Discontinued) are noted for design planning purposes but do not prevent electrical equivalence.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	Product Status	RoHS3	MSL
RC3216F3921CS	Samsung Electro-Mechanics	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Active	Yes	1
CR1206-FX-3921ELF	Bourns Inc.	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Active	Yes	1
ERJ-8ENF3921V	Panasonic Electronic Components	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Not For New Designs	Yes	1
RC1206FR-073K92L	YAGEO	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Active	Yes	1
RMCF1206FT3K92	Stackpole Electronics Inc	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Active	Yes	1
CRCW12063K92FKEA	Vishay Dale	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Active	Yes	1
MCR18ERTF3921	Rohm Semiconductor	3.92 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Discontinued at DiGi Electronics	Yes	1

Engineering Selection Recommendations

Primary Substitutes (Active Status):

CR1206-FX-3921ELF (Bourns Inc.) and RC1206FR-073K92L (YAGEO) are recommended as primary substitutes due to Active product status and high inventory availability (22,435 and 104,536 pieces respectively). Both parts maintain identical electrical specifications and RoHS3 compliance.

RMCF1206FT3K92 (Stackpole Electronics Inc) and CRCW12063K92FKEA (Vishay Dale) are also Active status alternatives with AEC-Q200 automotive qualification. These parts are suitable for applications requiring automotive-grade reliability standards.

Secondary Substitutes (Limited Availability):

ERJ-8ENF3921V (Panasonic Electronic Components) carries "Not For New Designs" status, indicating the manufacturer has discontinued active development. This part remains electrically equivalent but should be used only in legacy design maintenance or when inventory constraints require it.

MCR18ERTF3921 (Rohm Semiconductor) is listed as "Discontinued at DiGi Electronics" with limited inventory (2,383 pieces). This part is electrically equivalent but represents a declining supply source.

Compliance Considerations:

All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly processes and storage conditions. No additional handling or environmental controls are required beyond standard component storage practices.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC3216F3921CS with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts meet identical electrical parameters: 3.92 kOhms ±1% tolerance, 0.25W power rating, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. No circuit redesign is required for direct substitution.

Q: What is the difference between "Active," "Not For New Designs," and "Discontinued" product status?

A: Active status indicates the manufacturer actively produces and supports the part for new designs. "Not For New Designs" means the manufacturer has ceased active development but may continue limited production for existing customers. "Discontinued" indicates the part is no longer available from the primary distributor. Status affects long-term supply reliability but not electrical equivalence.

Q: Are there packaging format differences between substitute parts?

A: Yes. Some parts are supplied in Tape & Reel (TR) format while others use Cut Tape (CT) & Digi-Reel® format. These packaging differences affect handling and assembly processes but do not impact electrical performance or physical fit in 1206 package footprints.

Q: Do any substitute parts have automotive qualification?

A: Yes. ERJ-8ENF3921V (Panasonic), RMCF1206FT3K92 (Stackpole), and CRCW12063K92FKEA (Vishay Dale) carry AEC-Q200 automotive qualification. These parts are suitable for automotive and high-reliability applications requiring automotive-grade component standards.

Q: What are the physical dimension variations among substitute parts?

A: All parts conform to 1206 (3216 Metric) package specification. Minor variations exist: length ranges from 3.05mm to 3.20mm, width is consistently 1.55mm to 1.60mm, and height ranges from 0.60mm to 0.75mm. These variations remain within 1206 package tolerance and do not affect PCB footprint compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard lead-free soldering processes and standard component storage conditions.

Q: Which substitute part has the highest inventory availability?

A: RC1206FR-073K92L (YAGEO) has the highest inventory with 104,536 pieces in stock, followed by ERJ-8ENF3921V (Panasonic) with 95,023 pieces and CR1206-FX-3921ELF (Bourns) with 22,435 pieces.

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