RC2012J185CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012J185CS is a 1.8 MOhms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.125W (1/8W) in 0805 (2012 Metric) package format. This component is classified as Active product status and is ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity). The part is supplied in Tape & Reel packaging and features moisture-resistant construction suitable for general industrial and commercial applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	Value	Specification Range
Resistance	1.8 MOhms	Fixed value
Tolerance	±5%	Tolerance class
Power Rating	0.125W (1/8W)	Fixed rating
Package / Case	0805 (2012 Metric)	2.00mm L x 1.25mm W
Composition	Thick Film	Film type
Temperature Coefficient	±100ppm/°C	Stability specification
Operating Temperature	-55°C to 155°C	Temperature range
RoHS Status	ROHS3 Compliant	Environmental compliance
MSL Rating	1 (Unlimited)	Moisture sensitivity

Substitute Part Grouping Explanation

Substitute parts for the RC2012J185CS are categorized based on the following substitution criteria:

Primary Substitution Parameters:

Resistance value: 1.8 MOhms (exact match required)
Power rating: 0.125W / 1/8W (exact match required)
Package: 0805 (2012 Metric) (exact match required)
Operating temperature range: -55°C to 155°C (exact match required)
Composition: Thick Film (exact match required)
RoHS compliance: ROHS3 Compliant (exact match required)
MSL rating: Level 1 (exact match required)

Secondary Variation Parameters:

Tolerance: ±5% (main part) or ±1% (upgrade substitutes)
Temperature coefficient: ±100ppm/°C or ±200ppm/°C
Features: Moisture Resistant, Automotive AEC-Q200, or High Voltage
Manufacturer: Samsung Electro-Mechanics, YAGEO, Panasonic, Rohm, Stackpole, Bourns, or Vishay Dale

Parts are grouped as follows:

Direct Equivalent (Same Tolerance ±5%): RC0805JR-071M8L (YAGEO), RMCF0805JT1M80 (Stackpole)

Upgrade Substitutes (Improved Tolerance ±1%): RC2012F185CS (Samsung), ERJ-6ENF1804V (Panasonic), KTR10EZPF1804 (Rohm), RC0805FR-071M8L (YAGEO), RMCF0805FT1M80 (Stackpole), CHV0805-FX-1804ELF (Bourns), CRCW08051M80FKEA (Vishay Dale)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp (°C)	Features	RoHS	MSL
RC2012J185CS	Samsung Electro-Mechanics	1.8M	±5%	0.125	0805	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	1
RC2012F185CS	Samsung Electro-Mechanics	1.8M	±1%	0.125	0805	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	1
RC0805JR-071M8L	YAGEO	1.8M	±5%	0.125	0805	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	1
ERJ-6ENF1804V	Panasonic Electronic Components	1.8M	±1%	0.125	0805	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	1
KTR10EZPF1804	Rohm Semiconductor	1.8M	±1%	0.125	0805	±100ppm/°C	-55 to 155	Automotive AEC-Q200, High Voltage	ROHS3	1
RC0805FR-071M8L	YAGEO	1.8M	±1%	0.125	0805	±100ppm/°C	-55 to 155	Moisture Resistant	ROHS3	1
RMCF0805FT1M80	Stackpole Electronics Inc	1.8M	±1%	0.125	0805	±200ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	1
RMCF0805JT1M80	Stackpole Electronics Inc	1.8M	±5%	0.125	0805	±200ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	1
CHV0805-FX-1804ELF	Bourns Inc.	1.8M	±1%	0.125	0805	±100ppm/°C	-55 to 155	High Voltage	ROHS3	1
CRCW08051M80FKEA	Vishay Dale	1.8M	±1%	0.125	0805	±100ppm/°C	-55 to 155	Automotive AEC-Q200	ROHS3	1

Engineering Selection Recommendations

Direct Equivalent Selection (Same Tolerance ±5%):

RC0805JR-071M8L (YAGEO) and RMCF0805JT1M80 (Stackpole) provide direct functional equivalence to RC2012J185CS with identical tolerance specifications. Both parts maintain ±5% tolerance, 0.125W power rating, and 0805 package format. RC0805JR-071M8L is available in higher inventory (5939 pcs) and features moisture-resistant construction matching the original specification. RMCF0805JT1M80 includes Automotive AEC-Q200 certification with higher temperature coefficient (±200ppm/°C) and is suitable for automotive applications requiring qualification standards.

Upgrade Substitute Selection (Improved Tolerance ±1%):

For applications requiring tighter tolerance specifications, upgrade substitutes with ±1% tolerance are available from multiple manufacturers. RC2012F185CS (Samsung Electro-Mechanics) maintains the same manufacturer as the original part with improved tolerance and Cut Tape packaging. RC0805FR-071M8L (YAGEO) offers the highest inventory availability (59253 pcs) with moisture-resistant features and ±100ppm/°C temperature coefficient. ERJ-6ENF1804V (Panasonic) and CRCW08051M80FKEA (Vishay Dale) include Automotive AEC-Q200 certification for applications requiring automotive-grade reliability. KTR10EZPF1804 (Rohm) combines AEC-Q200 certification with high voltage capability. RMCF0805FT1M80 (Stackpole) provides automotive qualification with ±200ppm/°C temperature coefficient. CHV0805-FX-1804ELF (Bourns) is specified for high voltage applications with ±1% tolerance.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and -55°C to 155°C operating temperature range, ensuring compatibility with the original design requirements.

Frequently Asked Questions (FAQ)

Q: Can RC0805JR-071M8L be used as a direct replacement for RC2012J185CS?

A: Yes. RC0805JR-071M8L is a direct equivalent with identical electrical specifications: 1.8 MOhms ±5% tolerance, 0.125W power rating, 0805 package, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range. Both parts feature moisture-resistant thick film construction and ROHS3 compliance.

Q: What is the difference between the main part and upgrade substitutes with ±1% tolerance?

A: The main part RC2012J185CS specifies ±5% tolerance, while upgrade substitutes such as RC0805FR-071M8L, ERJ-6ENF1804V, and CRCW08051M80FKEA specify ±1% tolerance. The ±1% tolerance provides tighter resistance value control, suitable for precision applications. All other electrical and mechanical parameters remain compatible.

Q: Are automotive-grade parts (AEC-Q200) compatible with non-automotive applications?

A: Yes. Automotive AEC-Q200 certified parts such as ERJ-6ENF1804V, CRCW08051M80FKEA, RMCF0805FT1M80, and KTR10EZPF1804 meet or exceed the electrical and environmental specifications of non-automotive grades. These parts are suitable for any application requiring the specified 1.8 MOhms resistance, 0.125W power rating, and 0805 package format.

Q: What is the significance of temperature coefficient differences (±100ppm/°C vs ±200ppm/°C)?

A: Temperature coefficient indicates resistance value drift over temperature range. RMCF0805FT1M80 and RMCF0805JT1M80 specify ±200ppm/°C, meaning greater resistance variation across the -55°C to 155°C operating range compared to parts with ±100ppm/°C specification. Selection depends on application sensitivity to resistance drift over temperature.

Q: Can parts with different packaging formats (Tape & Reel vs Cut Tape) be used interchangeably?

A: Yes, from a functional and electrical standpoint. Tape & Reel and Cut Tape packaging formats contain identical components; the difference is in supply format. Tape & Reel is suitable for automated assembly lines, while Cut Tape is appropriate for manual assembly or smaller production runs. The 0805 package dimensions (2.00mm L x 1.25mm W) remain constant across all packaging formats.

Q: Which substitute part has the highest inventory availability?

A: RC0805FR-071M8L (YAGEO) has the highest inventory with 59253 pcs in stock. This part offers ±1% tolerance upgrade with moisture-resistant features and is suitable for applications requiring improved tolerance specifications with assured supply availability.

Q: Are all substitute parts ROHS3 compliant and MSL Level 1 rated?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory specifications of the original RC2012J185CS part.

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