Equivalent & Substitute Parts for RCS2012J821CS

Part Overview

The RCS2012J821CS is a 820 Ohm ±5% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with anti-sulfur and moisture-resistant properties. The part is ROHS3 compliant and carries MSL Level 1 rating, indicating unlimited moisture sensitivity protection.

Substitute parts are identified based on matching electrical specifications (resistance value and power rating) while maintaining mechanical compatibility with the 0805 package form factor. Alternative sources provide equivalent or enhanced performance characteristics within the same package envelope.

Key Parameters

Parameter	Value
Resistance	820 Ohms
Tolerance	±5%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Features	Anti-Sulfur, Moisture Resistant
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are organized into two functional categories based on electrical and mechanical compatibility with RCS2012J821CS:

Category 1: Direct Equivalents (±5% Tolerance, 0.125W) These parts maintain identical tolerance and power specifications. Substitution is direct for applications requiring ±5% tolerance at 1/8W power dissipation in 0805 package.

Category 2: Enhanced Performance Alternatives These parts offer tighter tolerance (±1% or ±0.5%) or higher power rating (0.5W) while maintaining the same 820 Ohm resistance and 0805 package dimensions. Selection depends on application requirements for tolerance precision or thermal headroom.

Key Parameters Determining Substitution:

Resistance value: 820 Ohms (fixed)
Package form factor: 0805 (2012 Metric) (fixed)
Temperature coefficient: ±100ppm/°C (fixed across all alternatives)
Operating temperature range: -55°C to 155°C (fixed)
Composition: Thick Film (fixed)
Tolerance: ±5%, ±1%, or ±0.5% (variable by part)
Power rating: 0.125W or 0.5W (variable by part)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Features	Height Max (mm)	AEC-Q200
RCS2012J821CS	Samsung Electro-Mechanics	820 Ω	±5%	0.125W	0805	Anti-Sulfur, Moisture Resistant	0.66	No
AC0805FR-07820RL	YAGEO	820 Ω	±1%	0.125W	0805	Automotive AEC-Q200, Moisture Resistant	0.60	Yes
AC0805JR-07820RL	YAGEO	820 Ω	±5%	0.125W	0805	Automotive AEC-Q200, Moisture Resistant	0.60	Yes
CRCW0805820RFKEA	Vishay Dale	820 Ω	±1%	0.125W	0805	Automotive AEC-Q200	0.50	Yes
CRCW0805820RFKEAHP	Vishay Dale	820 Ω	±1%	0.5W	0805	Automotive AEC-Q200, Pulse Withstanding	0.50	Yes
ERJ-6ENF8200V	Panasonic Electronic Components	820 Ω	±1%	0.125W	0805	Automotive AEC-Q200	0.70	Yes
ERJ-P06D8200V	Panasonic Electronic Components	820 Ω	±0.5%	0.5W	0805	Automotive AEC-Q200, Pulse Withstanding	0.70	Yes
ERJ-UP6F8200V	Panasonic Electronic Components	820 Ω	±1%	0.5W	0805	Anti-Sulfur, Automotive AEC-Q200, Pulse Withstanding	0.70	Yes
RC0805FR-07820RL	YAGEO	820 Ω	±1%	0.125W	0805	Moisture Resistant	0.60	No
RC0805JR-07820RL	YAGEO	820 Ω	±5%	0.125W	0805	Moisture Resistant	0.60	No
RCS0805820RFKEA	Vishay Dale	820 Ω	±1%	0.5W	0805	Automotive AEC-Q200, Pulse Withstanding	0.50	Yes

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

AC0805JR-07820RL and RC0805JR-07820RL are direct functional equivalents with ±5% tolerance and 0.125W power rating. Both maintain the same electrical performance envelope as RCS2012J821CS. AC0805JR-07820RL includes AEC-Q200 automotive qualification, while RC0805JR-07820RL does not carry automotive certification.

For Improved Tolerance Requirements:

AC0805FR-07820RL, CRCW0805820RFKEA, ERJ-6ENF8200V, and RC0805FR-07820RL provide ±1% tolerance in 0.125W configuration. These parts are suitable for applications requiring tighter resistance accuracy while maintaining identical power dissipation and package dimensions.

For Enhanced Thermal Performance:

CRCW0805820RFKEAHP, ERJ-P06D8200V, ERJ-UP6F8200V, and RCS0805820RFKEA offer 0.5W power rating in the same 0805 package. These parts provide increased thermal headroom for applications with higher power dissipation requirements. ERJ-UP6F8200V includes anti-sulfur protection matching the original part specification.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating. Parts designated with AEC-Q200 (AC series, CRCW-HP series, ERJ series, RCS e3 series) carry automotive qualification suitable for automotive and industrial applications. Non-automotive qualified parts (RC_L series) are suitable for general industrial and consumer applications.

Frequently Asked Questions (FAQ)

Q: Can AC0805JR-07820RL directly replace RCS2012J821CS in all applications?

A: AC0805JR-07820RL is electrically equivalent with matching ±5% tolerance and 0.125W power rating. Both parts share identical 0805 package dimensions, temperature coefficient, and operating range. Physical height differs by 0.06mm (0.60mm vs 0.66mm), which is negligible for standard PCB assembly. AC0805JR-07820RL includes AEC-Q200 automotive qualification, providing additional quality assurance for demanding applications.

Q: What is the difference between 0.125W and 0.5W rated parts?

A: Power rating indicates maximum continuous power dissipation capability. 0.125W parts (1/8W) are suitable for low-power signal circuits. 0.5W parts (1/2W) provide four times greater thermal capacity, allowing higher current flow or voltage drop across the resistor without exceeding temperature limits. Selection depends on actual circuit power dissipation requirements. Using a higher-rated part in a low-power application introduces no performance penalty.

Q: Does tolerance affect circuit performance?

A: Tolerance specifies the manufacturing accuracy of resistance value. ±5% tolerance allows resistance to vary within ±41 Ohms of the 820 Ohm nominal value. ±1% tolerance restricts variation to ±8.2 Ohms. Applications requiring precise voltage dividers, filter tuning, or gain-setting networks benefit from tighter tolerance. General-purpose biasing and pull-up/pull-down applications function identically with either tolerance.

Q: Are all substitute parts available in the same packaging format?

A: All listed substitute parts are supplied in Tape & Reel (TR) packaging in 0805 (2012 Metric) form factor. Physical dimensions are 2.00mm length × 1.25mm width. Height varies between 0.50mm and 0.70mm maximum seated height. These variations are within standard PCB assembly tolerances and do not affect reflow soldering or component placement.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive industry standard qualification for passive components. It certifies that parts meet stringent reliability, temperature cycling, and failure rate requirements for automotive applications. Parts with AEC-Q200 certification are suitable for automotive, industrial, and high-reliability applications. Non-certified parts are suitable for general industrial and consumer applications without automotive requirements.

Q: Can ERJ-UP6F8200V replace RCS2012J821CS in sulfur-sensitive environments?

A: ERJ-UP6F8200V includes anti-sulfur protection matching RCS2012J821CS specification. Both parts are suitable for environments with hydrogen sulfide exposure or corrosive atmospheres. ERJ-UP6F8200V additionally provides 0.5W power rating and ±1% tolerance with AEC-Q200 qualification, offering enhanced performance in the same package.

Q: What is MSL Level 1 rating?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture baking requirements. Components are not sensitive to moisture absorption during storage or handling. All listed parts carry MSL Level 1 rating, eliminating moisture management concerns during inventory and assembly operations.

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