RCS3216J391CS Equivalent & Substitute Parts Reference

Part Overview

The RCS3216J391CS is a 390 Ohm ±5% 0.25W (1/4W) chip resistor manufactured by Samsung Electro-Mechanics in the 1206 (3216 Metric) package. This thick film resistor features anti-sulfur and moisture-resistant construction, operating across the temperature range of -55°C to 155°C. The part is currently active in production with 986 pieces in stock inventory.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained. Alternative manufacturers provide functionally equivalent 390 Ohm 1206 resistors with matching power ratings and operating parameters, enabling component sourcing flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Resistance	390 Ohms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
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 eligibility for the RCS3216J391CS is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Resistance value: 390 Ohms (exact match required)
Package type: 1206 (3216 Metric) (exact match required)
Power rating: 0.25W minimum (equal or higher acceptable)
Tolerance: ±5% or tighter (±1% acceptable as superior specification)
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C minimum
Composition: Thick Film
Termination count: 2 (exact match required)
RoHS compliance: ROHS3 Compliant

Substitution Logic: Parts are grouped into two categories based on tolerance specification. The main part specifies ±5% tolerance. Substitute parts with ±1% tolerance (tighter tolerance) are electrically compatible and provide superior accuracy. Parts with higher power ratings (0.75W) remain mechanically compatible within the 1206 package footprint and are functionally substitutable for applications not requiring the exact 0.25W specification.

All identified substitutes maintain identical resistance values, package dimensions, operating temperature ranges, and compliance certifications, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	RoHS	Product Status
RCS3216J391CS	Samsung Electro-Mechanics	390 Ω	±5%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
AC1206FR-07390RL	YAGEO	390 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
AC1206JR-07390RL	YAGEO	390 Ω	±5%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
CR1206-FX-3900ELF	Bourns Inc.	390 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
CRCW1206390RFKEA	Vishay Dale	390 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
CRCW1206390RFKEAHP	Vishay Dale	390 Ω	±1%	0.75	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
ERJ-8ENF3900V	Panasonic Electronic Components	390 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Not For New Designs
RC1206FR-07390RL	YAGEO	390 Ω	±1%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active
RC1206JR-07390RL	YAGEO	390 Ω	±5%	0.25	1206	±100ppm/°C	-55 to 155°C	ROHS3	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

Parts with Active product status and matching ±5% tolerance specification:

AC1206JR-07390RL (YAGEO) — Direct tolerance match, Active status, 3,881 units in stock
RC1206JR-07390RL (YAGEO) — Direct tolerance match, Active status, 3,200 units in stock

Secondary Substitutes (Superior Tolerance, Active Status):

Parts with ±1% tolerance provide tighter accuracy specifications while maintaining all other electrical and mechanical parameters:

AC1206FR-07390RL (YAGEO) — ±1% tolerance, Active status, 20,726 units in stock
CR1206-FX-3900ELF (Bourns Inc.) — ±1% tolerance, Active status, 53,952 units in stock
CRCW1206390RFKEA (Vishay Dale) — ±1% tolerance, Active status, 21,945 units in stock
RC1206FR-07390RL (YAGEO) — ±1% tolerance, Active status, 145,023 units in stock

Higher Power Rating Option:

CRCW1206390RFKEAHP (Vishay Dale) — 0.75W rating, ±1% tolerance, Active status, 16,065 units in stock. Suitable for applications requiring increased power dissipation capability within the 1206 package footprint.

Obsolescence Consideration:

ERJ-8ENF3900V (Panasonic Electronic Components) — Marked "Not For New Designs." While electrically and mechanically equivalent, this part should not be selected for new circuit designs due to product lifecycle status.

Frequently Asked Questions (FAQ)

Q: Can I substitute a ±1% tolerance resistor for the ±5% RCS3216J391CS?

A: Yes. The ±1% tolerance specification is tighter than ±5%, providing superior accuracy. All ±1% substitute parts maintain identical resistance values, package dimensions, power ratings, and operating temperature ranges. The substitution is electrically valid and mechanically compatible.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 1206 (3216 Metric) package with identical termination count (2) and compatible physical dimensions. PCB footprints designed for the RCS3216J391CS accommodate all listed substitutes without modification.

Q: What is the difference between the CRCW1206390RFKEA and CRCW1206390RFKEAHP?

A: Both parts are manufactured by Vishay Dale with 390 Ohm resistance and ±1% tolerance. The primary difference is power rating: CRCW1206390RFKEA is rated 0.25W (1/4W), while CRCW1206390RFKEAHP is rated 0.75W (3/4W) with pulse withstanding capability. The higher power rating part is substitutable for applications requiring increased thermal dissipation.

Q: Why is ERJ-8ENF3900V marked "Not For New Designs"?

A: This Panasonic part is electrically and mechanically equivalent but carries a "Not For New Designs" product status designation. This indicates the manufacturer is transitioning the part toward obsolescence. For new circuit designs, select from parts with Active product status to ensure long-term supply availability.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All parts listed, including the main part RCS3216J391CS, have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are automotive-rated substitutes available?

A: Yes. Several substitutes carry AEC-Q200 automotive qualification: AC1206FR-07390RL, AC1206JR-07390RL, CRCW1206390RFKEA, CRCW1206390RFKEAHP, and ERJ-8ENF3900V. These parts meet automotive reliability standards and are suitable for automotive applications.

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