RC1608F510CS Equivalent & Substitute Parts Reference

Part Overview

The RC1608F510CS is a 51 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.1W (1/10W) power dissipation in a 0603 (1608 Metric) surface mount package. This component is classified as Active product status with moisture resistant characteristics and unlimited moisture sensitivity level (MSL 1). The part is ROHS3 compliant and REACH unaffected, making it suitable for commercial and industrial applications. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, package type, and compliance certifications to ensure direct interchangeability in circuit designs.

Key Parameters

Parameter	Specification
Resistance Value	51 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Physical Dimensions	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max)	0.022" (0.55mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the RC1608F510CS are classified into three categories based on substitution compatibility:

Direct Substitutes maintain identical electrical and mechanical specifications with equivalent performance characteristics. These parts share the same resistance value (51 Ohms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and compliance certifications (ROHS3, REACH unaffected). Direct substitutes include CR0603-FX-51R0ELF (Bourns Inc.) and RC0603FR-0751RL (YAGEO).

Upgrade Substitutes provide enhanced performance characteristics while maintaining core electrical specifications. These parts meet or exceed the baseline requirements with additional features such as automotive AEC-Q200 qualification or improved temperature coefficient specifications. Upgrade substitutes include CRG0603F51R (TE Connectivity) and KTR03EZPF51R0 (Rohm Semiconductor).

Similar Substitutes share identical electrical and mechanical specifications but include additional certifications or feature enhancements. These parts are suitable for applications requiring automotive-grade components or enhanced reliability. Similar substitutes include AC0603FR-0751RL (YAGEO), CRCW060351R0FKEA (Vishay Dale), ERJ-3EKF51R0V (Panasonic), and RMCF0603FT51R0 (Stackpole Electronics).

The key parameters determining substitution eligibility are: resistance value, tolerance, power rating, package type, composition, operating temperature range, and compliance certifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Composition	Features	RoHS Status	Substitution Type
RC1608F510CS	Samsung Electro-Mechanics	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Moisture Resistant	ROHS3	Main Part
CR0603-FX-51R0ELF	Bourns Inc.	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Moisture Resistant	ROHS3	Direct
RC0603FR-0751RL	YAGEO	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Moisture Resistant	ROHS3	Direct
CRG0603F51R	TE Connectivity Passive Product	51 Ω	±1%	0.1	±200	-55 to 155	0603	Thick Film	—	ROHS3	Upgrade
KTR03EZPF51R0	Rohm Semiconductor	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Automotive AEC-Q200, High Voltage	ROHS3	Upgrade
AC0603FR-0751RL	YAGEO	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Automotive AEC-Q200, Moisture Resistant	ROHS3	Similar
CRCW060351R0FKEA	Vishay Dale	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Automotive AEC-Q200	ROHS3	Similar
ERJ-3EKF51R0V	Panasonic Electronic Components	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Automotive AEC-Q200	ROHS3	Similar
RMCF0603FT51R0	Stackpole Electronics Inc	51 Ω	±1%	0.1	±100	-55 to 155	0603	Thick Film	Automotive AEC-Q200	ROHS3	Similar

Engineering Selection Recommendations

For Direct Replacement in Commercial Applications: CR0603-FX-51R0ELF (Bourns Inc.) and RC0603FR-0751RL (YAGEO) are direct equivalents to RC1608F510CS. Both parts maintain identical electrical specifications, temperature coefficient (±100ppm/°C), moisture resistant characteristics, and ROHS3 compliance. Selection between these direct substitutes depends on packaging preference (Tape & Reel versus Cut Tape & Digi-Reel) and supplier availability.

For Automotive and High-Reliability Applications: KTR03EZPF51R0 (Rohm Semiconductor), AC0603FR-0751RL (YAGEO), CRCW060351R0FKEA (Vishay Dale), ERJ-3EKF51R0V (Panasonic), and RMCF0603FT51R0 (Stackpole Electronics) are qualified to automotive AEC-Q200 standard. These parts are suitable for applications requiring enhanced reliability and automotive-grade component certification while maintaining the same electrical performance as the main part.

For Applications with Relaxed Temperature Coefficient Requirements: CRG0603F51R (TE Connectivity) offers a temperature coefficient of ±200ppm/°C compared to the standard ±100ppm/°C. This part is suitable for applications where tighter temperature stability is not critical and represents an alternative from a different manufacturer.

All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance across commercial and industrial markets.

Frequently Asked Questions (FAQ)

Q: Can CR0603-FX-51R0ELF directly replace RC1608F510CS without circuit redesign? A: Yes. CR0603-FX-51R0ELF is a direct equivalent with identical resistance (51 Ohms), tolerance (±1%), power rating (0.1W), package type (0603), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). No circuit redesign is required.

Q: What is the difference between direct substitutes and upgrade substitutes? A: Direct substitutes maintain identical specifications including temperature coefficient and features. Upgrade substitutes provide enhanced characteristics such as automotive AEC-Q200 qualification or improved performance metrics while maintaining core electrical specifications. Upgrade substitutes are suitable for applications requiring higher reliability standards.

Q: Are automotive-qualified parts (AEC-Q200) compatible with commercial applications? A: Yes. Automotive-qualified parts such as KTR03EZPF51R0, AC0603FR-0751RL, CRCW060351R0FKEA, ERJ-3EKF51R0V, and RMCF0603FT51R0 meet or exceed commercial specifications and are fully compatible with commercial circuit designs. Automotive qualification represents an additional certification level.

Q: Does packaging type (Tape & Reel versus Cut Tape) affect electrical performance? A: No. Packaging type affects only handling, storage, and assembly processes. Electrical and mechanical specifications remain identical. RC0603FR-0751RL (Cut Tape & Digi-Reel) and CR0603-FX-51R0ELF (Tape & Reel) are electrically equivalent despite different packaging formats.

Q: What does temperature coefficient ±100ppm/°C mean for circuit performance? A: Temperature coefficient indicates resistance value change per degree Celsius. A ±100ppm/°C specification means the resistance value changes by approximately 0.01% per degree Celsius across the operating temperature range. CRG0603F51R with ±200ppm/°C exhibits twice this change rate and is suitable only for applications where this tolerance is acceptable.

Q: Are all listed substitutes ROHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for commercial and industrial applications.

Q: Can I use CRCW060351R0FKEA if my design specifies RC1608F510CS? A: Yes, with consideration of minor physical dimension differences. CRCW060351R0FKEA has dimensions of 0.061" L x 0.033" W (1.55mm x 0.85mm) and height 0.020" (0.50mm) compared to RC1608F510CS at 0.063" L x 0.031" W (1.60mm x 0.80mm) and height 0.022" (0.55mm). These variations are within standard 0603 package tolerances and do not affect PCB layout compatibility.

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