RC1608F1331CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F1331CS is a 1.33 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format. This surface mount device is rated for 0.1W (1/10W) power dissipation with moisture resistant construction and operates across the temperature range of -55°C to 155°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are necessary to address supply chain continuity, inventory management, and application-specific requirements such as automotive qualification or alternative sourcing options.

Key Parameters

Parameter	Value	Criticality for Substitution
Resistance Value	1.33 kOhms	Critical - Must Match Exactly
Tolerance	±1%	Critical - Must Match Exactly
Power Rating	0.1W (1/10W)	Critical - Must Match or Exceed
Package / Case	0603 (1608 Metric)	Critical - Must Match Exactly
Composition	Thick Film	Critical - Determines Performance Characteristics
Temperature Coefficient	±100ppm/°C	Important - Affects Stability
Operating Temperature Range	-55°C ~ 155°C	Critical - Must Meet or Exceed
Moisture Sensitivity Level	MSL 1 (Unlimited)	Important - Handling and Storage
RoHS Status	ROHS3 Compliant	Important - Regulatory Compliance
Number of Terminations	2	Critical - Package Configuration

Substitute Part Grouping Explanation

Substitute parts for the RC1608F1331CS are classified into two categories based on electrical and mechanical parameter alignment:

Direct Equivalents share identical electrical specifications, physical dimensions, and compliance certifications with the main part:

Resistance: 1.33 kOhms ±1%
Power Rating: 0.1W (1/10W)
Package: 0603 (1608 Metric)
Temperature Coefficient: ±100ppm/°C
Operating Temperature: -55°C ~ 155°C
Composition: Thick Film with Moisture Resistant features
RoHS3 Compliance: Yes
MSL Rating: 1 (Unlimited)

Similar Parts meet all critical electrical and thermal specifications but include additional automotive qualification (AEC-Q200) or have minor dimensional variations within acceptable tolerances. These parts are suitable for applications requiring automotive-grade components or where supply from alternative manufacturers is required.

Substitution is valid when the following conditions are met:

Resistance value and tolerance match exactly
Power rating meets or exceeds application requirements
Package dimensions are compatible with PCB layout
Operating temperature range encompasses application environment
Composition and construction type remain consistent
Compliance certifications meet application requirements

Parameter Comparison

Parameter	RC1608F1331CS (Samsung)	CR0603-FX-1331ELF (Bourns)	RC0603FR-071K33L (YAGEO)	CRCW06031K33FKEA (Vishay Dale)	CRCW06031K33FKTA (Vishay Dale)	ERJ-3EKF1331V (Panasonic)	RMCF0603FT1K33 (Stackpole)
Resistance	1.33 kOhms	1.33 kOhms	1.33 kOhms	1.33 kOhms	1.33 kOhms	1.33 kOhms	1.33 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%	±1%	±1%
Power Rating	0.1W	0.1W	0.1W	0.1W	0.1W	0.1W	0.1W
Package	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±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	-55°C ~ 155°C	-55°C ~ 155°C
Moisture Sensitivity	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1	MSL 1
RoHS3 Compliant	Yes	Yes	Yes	Yes	No	Yes	Yes
Automotive AEC-Q200	No	No	No	Yes	Yes	Yes	Yes
Length (L)	0.063" (1.60mm)	0.063" (1.60mm)	0.063" (1.60mm)	0.061" (1.55mm)	0.063" (1.60mm)	0.063" (1.60mm)	0.061" (1.55mm)
Width (W)	0.031" (0.80mm)	0.031" (0.80mm)	0.031" (0.80mm)	0.033" (0.85mm)	0.033" (0.85mm)	0.031" (0.80mm)	0.031" (0.80mm)
Height (Max)	0.022" (0.55mm)	0.022" (0.55mm)	0.022" (0.55mm)	0.020" (0.50mm)	0.020" (0.50mm)	0.022" (0.55mm)	0.022" (0.55mm)

Engineering Selection Recommendations

For Standard Industrial Applications (Non-Automotive):

The RC0603FR-071K33L (YAGEO) and CR0603-FX-1331ELF (Bourns) are direct functional equivalents to the RC1608F1331CS. Both parts maintain identical electrical specifications, thermal performance, and dimensional compatibility. YAGEO RC0603FR-071K33L offers the highest inventory availability (129,080 pcs) and is suitable for applications where automotive qualification is not required. Bourns CR0603-FX-1331ELF provides an alternative with comparable specifications and 42,068 pcs in stock.

For Automotive and High-Reliability Applications:

The ERJ-3EKF1331V (Panasonic), CRCW06031K33FKEA (Vishay Dale), and RMCF0603FT1K33 (Stackpole) are qualified to AEC-Q200 automotive standards. These parts meet all electrical and thermal requirements of the main part while providing additional automotive-grade reliability certification. ERJ-3EKF1331V offers the highest inventory (59,837 pcs) among automotive-qualified options and maintains full ROHS3 compliance. RMCF0603FT1K33 (Stackpole) provides 86,227 pcs availability with AEC-Q200 qualification and ROHS3 compliance.

Compliance Considerations:

CRCW06031K33FKTA (Vishay Dale) does not meet ROHS3 compliance requirements and is REACH Affected. This part is not recommended for applications requiring regulatory compliance with current environmental standards.

Dimensional Compatibility:

All substitute parts are compatible with 0603 (1608 Metric) PCB footprints. Minor dimensional variations in length (0.061" to 0.063") and width (0.031" to 0.033") are within standard 0603 package tolerances and do not affect PCB layout or assembly processes.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F1331CS with any of the listed parts without design changes?

A: Yes, all listed substitute parts are electrically and mechanically compatible with the RC1608F1331CS. They share identical resistance values (1.33 kOhms ±1%), power ratings (0.1W), package format (0603), and operating temperature ranges (-55°C to 155°C). No circuit design modifications are required.

Q: What is the difference between direct equivalents and similar parts?

A: Direct equivalents (CR0603-FX-1331ELF, RC0603FR-071K33L) match all specifications of the main part without additional qualifications. Similar parts (ERJ-3EKF1331V, CRCW06031K33FKEA, RMCF0603FT1K33) include automotive AEC-Q200 qualification, making them suitable for automotive applications requiring higher reliability standards.

Q: Are dimensional differences between parts significant?

A: Dimensional variations are minimal and within standard 0603 package tolerances. Length ranges from 0.061" to 0.063" and width from 0.031" to 0.033". These variations do not affect PCB footprint compatibility or assembly processes. Height differences (0.020" to 0.022") are also within acceptable tolerances for standard reflow soldering.

Q: Which substitute part has the best inventory availability?

A: RC0603FR-071K33L (YAGEO) offers the highest inventory with 129,080 pcs in stock. For automotive-qualified alternatives, RMCF0603FT1K33 (Stackpole) provides 86,227 pcs and ERJ-3EKF1331V (Panasonic) provides 59,837 pcs.

Q: Should I use automotive-qualified parts for non-automotive applications?

A: Automotive-qualified parts (AEC-Q200) are suitable for any application and provide additional reliability assurance. However, for non-automotive applications without specific reliability requirements, standard industrial-grade equivalents offer cost optimization while maintaining full functional compatibility.

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates the part meets current environmental and hazardous substance restrictions. All recommended substitute parts except CRCW06031K33FKTA are ROHS3 compliant. For applications subject to environmental regulations or customer requirements, ROHS3-compliant parts are mandatory.

Q: Can I mix different manufacturers' parts in the same production batch?

A: Yes, all listed substitute parts are functionally equivalent and can be used interchangeably in the same circuit. However, for consistency in manufacturing records and traceability, it is standard practice to maintain single-source parts within a production batch when possible.

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

A: MSL 1 indicates the part has unlimited shelf life and does not require special moisture-controlled storage conditions. All listed parts share this MSL 1 rating, eliminating moisture-related handling constraints during storage and assembly.

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