RC1608F5231CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F5231CS is a 5.23 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.1W (1/10W) in a 0603 (1608 Metric) surface mount package. This component is classified as Active product status and is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and compliance certifications to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value
Resistance	5.23 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Composition	Thick Film
Package / Case	0603 (1608 Metric)
Size / Dimension	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max)	0.022" (0.55mm)
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC1608F5231CS are classified into two categories based on substitution criteria:

Direct Substitutes (Functionally Equivalent): Parts that match all critical electrical and mechanical parameters without additional certifications. These include CR0603-FX-5231ELF (Bourns Inc.) and RC0603FR-075K23L (YAGEO). Both maintain identical resistance value (5.23 kOhms), tolerance (±1%), power rating (0.1W), package dimensions (0603), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C).

Similar Substitutes (Functionally Equivalent with Enhanced Certifications): Parts that match all electrical and mechanical parameters but include additional automotive AEC-Q200 qualification. These include AC0603FR-075K23L (YAGEO), CRCW06035K23FKEA (Vishay Dale), ERJ-3EKF5231V (Panasonic Electronic Components), and RMCF0603FT5K23 (Stackpole Electronics Inc.). The AEC-Q200 certification indicates automotive-grade reliability testing and is a superset qualification that does not restrict use in non-automotive applications.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical termination count (2). Dimensional variations within tolerance (±0.002" to ±0.004" in length and width, ±0.002" in height) are within standard manufacturing specifications for 0603 package resistors and do not affect circuit performance or PCB assembly compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Composition	Package / Case	Temperature Coefficient	Operating Temperature	RoHS Status	MSL	AEC-Q200
RC1608F5231CS	Samsung Electro-Mechanics	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	No
CR0603-FX-5231ELF	Bourns Inc.	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	No
RC0603FR-075K23L	YAGEO	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	No
AC0603FR-075K23L	YAGEO	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	Yes
CRCW06035K23FKEA	Vishay Dale	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	Yes
ERJ-3EKF5231V	Panasonic Electronic Components	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	Yes
RMCF0603FT5K23	Stackpole Electronics Inc	5.23 kOhms	±1%	0.1W	Thick Film	0603 (1608 Metric)	±100ppm/°C	-55°C ~ 155°C	ROHS3 Compliant	1	Yes

Engineering Selection Recommendations

For Standard Applications (Non-Automotive): RC0603FR-075K23L (YAGEO) or CR0603-FX-5231ELF (Bourns Inc.) are direct functional equivalents. Both maintain identical electrical and mechanical specifications with ROHS3 compliance and MSL 1 rating. Selection between these two is based on packaging preference (Cut Tape & Digi-Reel® versus Tape & Reel) and inventory availability.

For Automotive or Enhanced Reliability Applications: AC0603FR-075K23L (YAGEO), CRCW06035K23FKEA (Vishay Dale), ERJ-3EKF5231V (Panasonic Electronic Components), or RMCF0603FT5K23 (Stackpole Electronics Inc.) are suitable. All four parts carry AEC-Q200 automotive qualification, indicating compliance with automotive-grade reliability and environmental testing standards. These parts are backward compatible with non-automotive applications and provide enhanced qualification documentation.

Inventory and Availability Considerations: RMCF0603FT5K23 (Stackpole Electronics Inc.) offers the highest inventory availability at 242,940 pieces. RC0603FR-075K23L (YAGEO) provides 360,815 pieces. CR0603-FX-5231ELF (Bourns Inc.) has 42,515 pieces available. Selection based on supply chain requirements and lead time constraints is appropriate.

All substitute parts are Active product status with no known obsolescence risk.

Frequently Asked Questions (FAQ)

Q: Can I substitute RC1608F5231CS with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts match the critical electrical parameters (5.23 kOhms ±1%, 0.1W power rating, ±100ppm/°C temperature coefficient, -55°C ~ 155°C operating range) and mechanical specifications (0603 package, 2 terminations). Direct PCB footprint compatibility is maintained. No circuit redesign is required.

Q: What is the difference between direct substitutes and similar substitutes?

A: Direct substitutes (CR0603-FX-5231ELF, RC0603FR-075K23L) match all electrical and mechanical parameters without additional certifications. Similar substitutes (AC0603FR-075K23L, CRCW06035K23FKEA, ERJ-3EKF5231V, RMCF0603FT5K23) include AEC-Q200 automotive qualification. AEC-Q200 is an additional certification that does not restrict use in non-automotive applications; it indicates enhanced reliability testing and documentation suitable for automotive supply chains.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within standard manufacturing tolerances. CRCW06035K23FKEA and RMCF0603FT5K23 have length specifications of 0.061" (1.55mm) versus the standard 0.063" (1.60mm), and CRCW06035K23FKEA has width of 0.033" (0.85mm) versus 0.031" (0.80mm). These variations are within ±0.004" tolerance for 0603 package resistors and do not affect PCB assembly compatibility or circuit performance.

Q: Which substitute part should I select for cost optimization?

A: Cost selection requires current pricing data not provided in this reference. However, RMCF0603FT5K23 (Stackpole Electronics Inc.) and RC0603FR-075K23L (YAGEO) offer the highest inventory levels, which typically correlates with competitive pricing and shorter lead times.

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

A: Yes. AEC-Q200 qualification is a superset standard that includes additional automotive-grade testing and documentation. Parts meeting AEC-Q200 are fully compatible with non-automotive applications and provide enhanced reliability documentation.

Q: What packaging options are available?

A: RC1608F5231CS is supplied in Cut Tape (CT). Substitute parts are available in Cut Tape (CT) & Digi-Reel® (RC0603FR-075K23L) or Tape & Reel (TR) (CR0603-FX-5231ELF, AC0603FR-075K23L, CRCW06035K23FKEA, ERJ-3EKF5231V, RMCF0603FT5K23). Packaging selection depends on assembly process requirements and volume specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original RC1608F5231CS specifications.

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