RCS2012F1780CS Equivalent & Substitute Parts

Part Overview

The RCS2012F1780CS is a 178 Ohm ±1% 0.125W thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The RCS2012F1780CS features anti-sulfur and moisture-resistant construction, operating across -55°C to 155°C temperature range. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or specific certification requirements such as automotive AEC-Q200 qualification.

Key Parameters

Parameter	Value
Resistance	178 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 ~ 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Packaging Type	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitution eligibility for the RCS2012F1780CS is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

Resistance value: 178 Ohms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Package: 0805 (2012 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2
RoHS compliance: ROHS3
Moisture sensitivity level: 1 (Unlimited)
Packaging format: Tape & Reel (TR)

All identified substitute parts meet these electrical and mechanical specifications. Variations in physical dimensions (height-seated maximum) and additional certifications (AEC-Q200 automotive qualification) do not affect functional substitutability within the specified parameter envelope.

Parameter Comparison

Parameter	RCS2012F1780CS (Samsung)	CRCW0805178RFKEA (Vishay Dale)	ERJ-6ENF1780V (Panasonic)	RC0805FR-07178RL (YAGEO)	RMCF0805FT178R (Stackpole)
Resistance	178 Ohms	178 Ohms	178 Ohms	178 Ohms	178 Ohms
Tolerance	±1%	±1%	±1%	±1%	±1%
Power Rating	0.125W	0.125W	0.125W	0.125W	0.125W
Package	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Height - Seated (Max)	0.026" (0.66mm)	0.020" (0.50mm)	0.028" (0.70mm)	0.024" (0.60mm)	0.026" (0.65mm)
Automotive Certification	None specified	AEC-Q200	AEC-Q200	None specified	AEC-Q200

Engineering Selection Recommendations

All substitute parts listed are functionally equivalent to the RCS2012F1780CS based on electrical specifications and mechanical compatibility. Selection among these alternatives is determined by application requirements and supply chain considerations:

CRCW0805178RFKEA (Vishay Dale): Active product status with AEC-Q200 automotive qualification. Inventory availability: 27,774 pieces. Lowest seated height at 0.020" (0.50mm). Suitable for automotive applications requiring AEC-Q200 compliance.

ERJ-6ENF1780V (Panasonic Electronic Components): Active product status with AEC-Q200 automotive qualification. Inventory availability: 73,229 pieces. Highest seated height at 0.028" (0.70mm). Largest available inventory stock.

RC0805FR-07178RL (YAGEO): Active product status without automotive certification. Inventory availability: 41,491 pieces. Seated height 0.024" (0.60mm). Moisture-resistant construction matching original specification.

RMCF0805FT178R (Stackpole Electronics Inc): Active product status with AEC-Q200 automotive qualification. Inventory availability: 767 pieces. Seated height 0.026" (0.65mm), matching original part dimensions. Limited inventory stock.

All parts maintain ROHS3 compliance, unlimited MSL rating, and identical electrical performance within specified tolerance and temperature operating range.

Frequently Asked Questions (FAQ)

Q: Can CRCW0805178RFKEA replace RCS2012F1780CS in non-automotive applications?

A: Yes. CRCW0805178RFKEA meets all electrical and mechanical specifications of RCS2012F1780CS. AEC-Q200 certification is an additional qualification that does not restrict use in non-automotive circuits. The lower seated height (0.020" vs 0.026") may require PCB layout verification for clearance-critical designs.

Q: What is the difference between parts with and without AEC-Q200 certification?

A: AEC-Q200 certification indicates compliance with automotive industry reliability and qualification standards. Parts without this certification (RC0805FR-07178RL, RCS2012F1780CS) are not restricted from automotive use but have not undergone automotive-specific qualification testing. Selection depends on application requirements and design specifications.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging format, matching the original RCS2012F1780CS packaging specification.

Q: Do seated height variations affect PCB assembly compatibility?

A: Seated height differences range from 0.020" to 0.028" (0.50mm to 0.70mm). These variations are within typical PCB assembly tolerances for 0805 package components. Verification is required only for designs with height-constrained clearance specifications or automated assembly equipment with strict height limits.

Q: Which substitute part has the largest inventory availability?

A: ERJ-6ENF1780V (Panasonic) has the largest inventory at 73,229 pieces in stock.

Q: Are all parts REACH compliant?

A: Yes. All listed parts, including RCS2012F1780CS and all substitutes, have REACH Unaffected status.

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