RCS2012F300CS Equivalent & Substitute Parts Reference

Part Overview

The RCS2012F300CS is a 30 Ohm ±1% 1/8W thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component features anti-sulfur and moisture-resistant construction, operating across -55°C to 155°C with a temperature coefficient of ±100ppm/°C. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to ensure direct circuit board replacement capability.

Key Parameters

Parameter	Specification
Resistance Value	30 Ohms
Tolerance	±1%
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
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RCS2012F300CS are classified into two functional groups based on power rating compatibility:

Group 1: Direct Equivalents (0.125W / 1/8W Rating) These parts match all critical electrical and mechanical parameters: 30 Ohm resistance, ±1% tolerance, 0.125W power rating, 0805 package, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Parts in this group include AC0805FR-0730RL (YAGEO), ERJ-6ENF30R0V (Panasonic), RMCF0805FT30R0 (Stackpole), and RC0805FR-0730RL (YAGEO). These provide pin-for-pin compatibility with identical thermal and electrical performance characteristics.

Group 2: Higher Power Rating Alternatives (0.4W to 0.5W) These parts maintain the same resistance, tolerance, package, and temperature specifications but feature elevated power ratings: CRCW080530R0FKEAHP (0.5W), ERJ-UP6F30R0V (0.5W), and ESR10EZPF30R0 (0.4W). These components are mechanically compatible within the 0805 footprint and electrically interchangeable for applications requiring enhanced power dissipation capability.

Substitution eligibility is determined by: resistance value match (30 Ohms), tolerance match (±1%), package match (0805), composition match (thick film), temperature range match (-55°C to 155°C), and power rating sufficiency (≥0.125W).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Temp Range	Height Max (mm)	AEC-Q200	RoHS3
RCS2012F300CS	Samsung Electro-Mechanics	30Ω	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.66	No	Yes
AC0805FR-0730RL	YAGEO	30Ω	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.60	Yes	Yes
CRCW080530R0FKEA	Vishay Dale	30Ω	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.50	Yes	Yes
CRCW080530R0FKEAHP	Vishay Dale	30Ω	±1%	0.5	0805	±100ppm/°C	-55 to 155°C	0.50	Yes	Yes
ERJ-6ENF30R0V	Panasonic Electronic Components	30Ω	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.70	Yes	Yes
ERJ-UP6F30R0V	Panasonic Electronic Components	30Ω	±1%	0.5	0805	±100ppm/°C	-55 to 155°C	0.70	Yes	Yes
ESR10EZPF30R0	Rohm Semiconductor	30Ω	±1%	0.4	0805	±100ppm/°C	-55 to 155°C	0.65	Yes	Yes
RC0805FR-0730RL	YAGEO	30Ω	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.60	No	Yes
RMCF0805FT30R0	Stackpole Electronics Inc	30Ω	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.65	Yes	Yes

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): AC0805FR-0730RL, CRCW080530R0FKEA, ERJ-6ENF30R0V, RMCF0805FT30R0, and RC0805FR-0730RL provide electrical and mechanical equivalence to RCS2012F300CS. All substitute parts maintain ROHS3 compliance and MSL 1 rating. AC0805FR-0730RL, CRCW080530R0FKEA, ERJ-6ENF30R0V, and RMCF0805FT30R0 carry AEC-Q200 automotive qualification, providing enhanced reliability documentation for applications requiring automotive-grade components.

For Enhanced Power Dissipation: CRCW080530R0FKEAHP, ERJ-UP6F30R0V, and ESR10EZPF30R0 offer increased power ratings (0.4W to 0.5W) while maintaining all other electrical parameters. These components remain mechanically compatible within 0805 footprints and are suitable for circuits where thermal margin improvement is beneficial. All three carry AEC-Q200 certification.

Packaging Considerations: RCS2012F300CS is supplied in Tape & Reel (TR) format. RC0805FR-0730RL is available in Cut Tape (CT) & Digi-Reel® format. CRCW080530R0FKEAHP is supplied in Cut Tape (CT) & Digi-Reel® format. Verify packaging compatibility with assembly equipment specifications before procurement.

Frequently Asked Questions (FAQ)

Q: Can CRCW080530R0FKEAHP (0.5W) be used in place of RCS2012F300CS (0.125W)? A: Yes. CRCW080530R0FKEAHP is mechanically and electrically compatible. The higher power rating provides additional thermal margin without affecting circuit performance. The component maintains identical resistance, tolerance, package dimensions, and operating temperature range.

Q: What is the difference between AC0805FR-0730RL and RC0805FR-0730RL? A: Both are YAGEO 30 Ohm ±1% 0805 resistors with identical electrical specifications. AC0805FR-0730RL carries AEC-Q200 automotive qualification; RC0805FR-0730RL does not. RC0805FR-0730RL is supplied in Cut Tape (CT) & Digi-Reel® format with significantly higher inventory availability (681,729 pcs vs. 3,037 pcs).

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance matching the original RCS2012F300CS specification.

Q: Which substitute parts have AEC-Q200 automotive qualification? A: AC0805FR-0730RL, CRCW080530R0FKEA, CRCW080530R0FKEAHP, ERJ-6ENF30R0V, ERJ-UP6F30R0V, ESR10EZPF30R0, and RMCF0805FT30R0 all carry AEC-Q200 certification. RC0805FR-0730RL and RCS2012F300CS do not.

Q: Can height differences affect PCB assembly? A: Component heights range from 0.50mm to 0.70mm maximum seated height. Verify clearance with PCB design specifications and reflow oven profiles. Height variations within this range are standard for 0805 thick film resistors and do not typically affect assembly compatibility.

Q: What is the significance of MSL 1 rating? A: MSL 1 (Unlimited) indicates unlimited shelf life without moisture bake requirements. All listed parts maintain MSL 1 rating, eliminating moisture sensitivity concerns during storage and handling.

Q: Are substitute parts available in equivalent quantities? A: Inventory levels vary significantly. CRCW080530R0FKEA offers the highest availability (32,252 pcs), while RC0805FR-0730RL provides exceptional stock (681,729 pcs). Verify current inventory with suppliers for production requirements.

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