RC2012F1781CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F1781CS is a 1.78 kOhms ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status and is RoHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity). The RC2012F1781CS is supplied in Tape & Reel packaging with 776 pieces currently in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Resistance	1.78 kOhms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Composition	Thick Film
Package / Case	0805 (2012 Metric)
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC2012F1781CS are qualified based on the following criteria:

Electrical Parameters (Must Match):

Resistance value: 1.78 kOhms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C

Mechanical Parameters (Must Match):

Package type: 0805 (2012 Metric)
Composition: Thick Film
Number of terminations: 2

Compliance Parameters (Must Match):

RoHS3 Compliant
MSL Level 1 (Unlimited)
REACH Unaffected
ECCN: EAR99

All identified substitute parts meet these core requirements. Additional features such as Automotive AEC-Q200 qualification represent enhanced specifications beyond the base requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff (ppm/°C)	Op. Temp Range (°C)	Height Max (mm)	Packaging Type	RoHS3	MSL
RC2012F1781CS	Samsung Electro-Mechanics	1.78 kΩ	±1%	0.125	0805	±100	-55 ~ 155	0.66	Tape & Reel	Yes	1
RC0805FR-071K78L	YAGEO	1.78 kΩ	±1%	0.125	0805	±100	-55 ~ 155	0.60	Cut Tape & Digi-Reel	Yes	1
AC0805FR-071K78L	YAGEO	1.78 kΩ	±1%	0.125	0805	±100	-55 ~ 155	0.60	Tape & Reel	Yes	1
CRCW08051K78FKEA	Vishay Dale	1.78 kΩ	±1%	0.125	0805	±100	-55 ~ 155	0.50	Tape & Reel	Yes	1
ERJ-6ENF1781V	Panasonic Electronic Components	1.78 kΩ	±1%	0.125	0805	±100	-55 ~ 155	0.70	Tape & Reel	Yes	1
RMCF0805FT1K78	Stackpole Electronics Inc	1.78 kΩ	±1%	0.125	0805	±100	-55 ~ 155	0.65	Tape & Reel	Yes	1

Engineering Selection Recommendations

All substitute parts listed are Active product status components with full RoHS3 compliance and MSL Level 1 rating, ensuring compatibility with the RC2012F1781CS in standard applications.

Direct Equivalent (Preferred for Standard Applications): RC0805FR-071K78L (YAGEO) provides direct electrical and mechanical equivalence with identical specifications. This part is available in high volume (50,888 pieces in stock) and is supplied in Cut Tape & Digi-Reel packaging, suitable for both manual and automated assembly processes.

Upgrade Option (Automotive Applications): AC0805FR-071K78L (YAGEO), CRCW08051K78FKEA (Vishay Dale), ERJ-6ENF1781V (Panasonic), and RMCF0805FT1K78 (Stackpole) all include Automotive AEC-Q200 qualification. These parts are suitable for applications requiring automotive-grade reliability and are available in Tape & Reel packaging. Selection among these options depends on packaging preference and inventory availability.

Packaging Considerations: Height variations range from 0.50mm to 0.70mm maximum seated height. All parts maintain 0805 package footprint compatibility. Verify PCB assembly equipment clearance specifications if height-constrained applications are present.

Frequently Asked Questions (FAQ)

Q: Can RC0805FR-071K78L replace RC2012F1781CS directly? A: Yes. RC0805FR-071K78L meets all electrical specifications (1.78 kΩ ±1%, 0.125W), mechanical dimensions (0805 package), and compliance requirements (RoHS3, MSL 1). The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and slightly lower seated height (0.60mm versus 0.66mm), which does not affect electrical performance or PCB compatibility.

Q: What is the difference between standard and AEC-Q200 qualified parts? A: AEC-Q200 qualification indicates the part meets automotive industry reliability standards. AC0805FR-071K78L, CRCW08051K78FKEA, ERJ-6ENF1781V, and RMCF0805FT1K78 carry this qualification. For non-automotive applications, standard parts such as RC0805FR-071K78L provide equivalent electrical performance at potentially lower cost.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant with MSL Level 1 (Unlimited) rating, matching the RC2012F1781CS compliance profile.

Q: Does seated height variation affect PCB assembly? A: Seated height ranges from 0.50mm to 0.70mm across all parts. For standard PCB applications with typical clearance specifications, this variation is within acceptable tolerances. Verify specific assembly equipment and PCB design constraints if height-critical applications are present.

Q: Which substitute part has the highest inventory availability? A: CRCW08051K78FKEA (Vishay Dale) has the highest inventory with 34,542 pieces in stock, followed by ERJ-6ENF1781V (Panasonic) with 62,267 pieces. RC0805FR-071K78L (YAGEO) provides 50,888 pieces in stock.

Q: Can these parts be used interchangeably in production? A: Yes, all substitute parts are electrically and mechanically interchangeable with the RC2012F1781CS. Packaging format differences (Tape & Reel versus Cut Tape & Digi-Reel) may require adjustment to assembly line equipment configuration but do not affect component performance or reliability.

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