RC1608F122CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F122CS is a 1.2 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with 838 pieces currently in stock. The RC1608F122CS serves as a standard general-purpose resistor for applications requiring moisture resistance and tight tolerance specifications. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical dimensions, and compliance certifications to ensure direct functional interchangeability in circuit designs.

Key Parameters

Parameter	Value	Specification
Resistance	1.2 kOhms	Nominal value
Tolerance	±1%	Accuracy specification
Power Rating	0.1W (1/10W)	Maximum dissipation
Package / Case	0603 (1608 Metric)	Physical form factor
Composition	Thick Film	Construction type
Temperature Coefficient	±100ppm/°C	Stability over temperature
Operating Temperature Range	-55°C to 155°C	Functional limits
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Handling requirement
RoHS Status	ROHS3 Compliant	Environmental compliance
Number of Terminations	2	Connection points

Substitute Part Grouping Explanation

Substitute parts for the RC1608F122CS are classified into three categories based on substitution relationship type and compliance status:

Direct Substitutes (Functionally Equivalent) Direct substitutes maintain identical electrical specifications (1.2 kOhms ±1%, 0.1W), mechanical dimensions (0603 package), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). These parts are interchangeable without circuit modification. Direct substitutes include CR0603-FX-1201ELF (Bourns Inc.), CRG0603F1K2 (TE Connectivity), and RC0603FR-071K2L (YAGEO).

Upgrade Substitutes (Enhanced Specifications) Upgrade substitutes meet or exceed the base electrical and mechanical requirements while offering additional features or certifications. MCR03ERTF1201 (Rohm Semiconductor) is classified as an upgrade substitute but carries discontinued status at DiGi Electronics, limiting its availability for new designs.

Similar Parts (Automotive-Qualified Variants) Similar parts maintain core electrical specifications and package compatibility but include additional certifications such as Automotive AEC-Q200 qualification. These include AC0603FR-071K2L, CRCW06031K20FKEA, CRCW06031K20FKEB, CRCW06031K20FKTA (YAGEO and Vishay Dale), ERJ-3EKF1201V (Panasonic), and RMCF0603FT1K20 (Stackpole Electronics). Automotive-qualified variants are suitable for applications requiring AEC-Q200 compliance.

Substitution Criteria:

Resistance value: 1.2 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power rating: 0.1W minimum (exact match required)
Package: 0603 (1608 Metric) (exact match required)
Composition: Thick film (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature: -55°C to 155°C minimum (exact match required)
MSL rating: 1 (Unlimited) or equivalent (exact match required)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff (ppm/°C)	Op Temp (°C)	MSL	RoHS Status	Product Status	Packaging Type
RC1608F122CS	Samsung Electro-Mechanics	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	-
CR0603-FX-1201ELF	Bourns Inc.	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Tape & Reel
CRG0603F1K2	TE Connectivity Passive Product	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Tape & Reel
RC0603FR-071K2L	YAGEO	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Cut Tape & Digi-Reel
MCR03ERTF1201	Rohm Semiconductor	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Discontinued at DiGi Electronics	Cut Tape & Digi-Reel
AC0603FR-071K2L	YAGEO	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Tape & Reel
CRCW06031K20FKEA	Vishay Dale	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Cut Tape & Digi-Reel
CRCW06031K20FKEB	Vishay Dale	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Discontinued at DiGi Electronics	Tape & Reel
CRCW06031K20FKTA	Vishay Dale	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	RoHS non-compliant	Active	Tape & Reel
ERJ-3EKF1201V	Panasonic Electronic Components	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Cut Tape & Digi-Reel
RMCF0603FT1K20	Stackpole Electronics Inc	1.2 kOhms	±1%	0.1	0603	Thick Film	±100	-55 to 155	1	ROHS3 Compliant	Active	Tape & Reel

Engineering Selection Recommendations

For Standard Applications (Non-Automotive): CR0603-FX-1201ELF (Bourns Inc.), CRG0603F1K2 (TE Connectivity), and RC0603FR-071K2L (YAGEO) are recommended as primary direct substitutes. All three maintain Active product status, ROHS3 compliance, and identical electrical specifications to the RC1608F122CS. These parts offer the highest availability and supply chain stability.

For Automotive Applications (AEC-Q200 Required): AC0603FR-071K2L (YAGEO), CRCW06031K20FKEA (Vishay Dale), ERJ-3EKF1201V (Panasonic), and RMCF0603FT1K20 (Stackpole Electronics) are qualified for automotive use with AEC-Q200 certification. All maintain Active status and ROHS3 compliance. These variants are suitable for automotive circuit designs requiring qualified component documentation.

Parts to Avoid for New Designs: MCR03ERTF1201 (Rohm Semiconductor) is discontinued at DiGi Electronics and should not be selected for new designs despite meeting electrical specifications. CRCW06031K20FKEB (Vishay Dale) is also discontinued at DiGi Electronics. CRCW06031K20FKTA (Vishay Dale) carries RoHS non-compliant status and REACH Affected designation, making it unsuitable for applications requiring environmental compliance.

Packaging Considerations: Tape & Reel packaging is preferred for high-volume production. Cut Tape & Digi-Reel packaging is suitable for lower-volume applications and prototyping. Selection should align with procurement and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F122CS with any of the listed equivalent parts without circuit modification?

A: Yes, all Direct Substitute parts (CR0603-FX-1201ELF, CRG0603F1K2, RC0603FR-071K2L) maintain identical electrical specifications, mechanical dimensions, and operating characteristics. No circuit modification is required. Similar parts with AEC-Q200 certification are also electrically compatible but should be selected only when automotive qualification is required.

Q: What is the difference between Direct Substitutes and Similar Parts?

A: Direct Substitutes match all electrical and mechanical parameters of the RC1608F122CS without additional certifications. Similar Parts include Automotive AEC-Q200 qualification, which adds compliance documentation and testing requirements. Both categories are functionally interchangeable in standard applications, but Similar Parts are specifically qualified for automotive use.

Q: Why is CRCW06031K20FKTA listed as a substitute if it is RoHS non-compliant?

A: CRCW06031K20FKTA is included in the reference for historical and legacy system documentation purposes. It meets all electrical and mechanical specifications but does not comply with RoHS3 requirements. This part should not be selected for new designs or applications requiring environmental compliance certification.

Q: Does packaging type affect electrical performance?

A: No. Packaging type (Tape & Reel, Cut Tape & Digi-Reel) affects procurement, storage, and assembly processes but does not alter electrical performance. Selection should be based on production volume, assembly equipment compatibility, and supply chain requirements.

Q: Are all listed parts available in the same quantities?

A: No. Inventory levels vary by manufacturer and distributor. CR0603-FX-1201ELF (Bourns) has 188,245 pieces in stock, while MCR03ERTF1201 (Rohm) has only 648 pieces. Availability should be verified with the component supplier before design finalization.

Q: Can I use automotive-qualified parts (AEC-Q200) in non-automotive applications?

A: Yes. Automotive-qualified parts exceed standard specifications and can be used in non-automotive applications. However, this may result in higher component cost without additional benefit for non-automotive use cases.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. These parts do not require special moisture-controlled storage or handling procedures and can be stored under standard warehouse conditions indefinitely.

Q: Are there any dimensional differences between substitute parts?

A: Minor dimensional variations exist. Most parts maintain 0.063" L x 0.031" W (1.60mm x 0.80mm) dimensions. CRCW series parts (CRCW06031K20FKEA, CRCW06031K20FKEB, CRCW06031K20FKTA) have slightly different dimensions: 0.061" L x 0.033" W (1.55mm x 0.85mm) for FKEA/FKEB and 0.063" L x 0.033" W (1.60mm x 0.85mm) for FKTA. These variations remain within 0603 package tolerance and do not affect PCB layout compatibility.

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