RC1608J512CS Equivalent & Substitute Parts

Part Overview

The RC1608J512CS is a 5.1 kOhms ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0603 (1608 Metric) package format. This component operates at 0.1W (1/10W) power rating with moisture-resistant characteristics and is rated for operating temperatures from -55°C to 155°C. The part maintains Active product status and is RoHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity).

Equivalent and substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required, or when enhanced specifications such as improved tolerance or automotive-grade certifications are needed for specific applications.

Key Parameters

Parameter	Value
Resistance	5.1 kOhms
Tolerance	±5%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Resistance	Yes
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RC1608J512CS is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Parameters:

Resistance value: 5.1 kOhms
Power rating: 0.1W (1/10W)
Package format: 0603 (1608 Metric)
Composition: Thick Film
Operating temperature range: -55°C ~ 155°C
RoHS3 compliance
MSL Level 1 rating

Allowable Variations:

Tolerance: ±5% (original) to ±1% (upgraded specifications)
Temperature coefficient: ±100ppm/°C to ±200ppm/°C
Manufacturer: Different manufacturers with equivalent specifications
Packaging format: Cut Tape (CT) or Tape & Reel (TR)
Additional features: Automotive AEC-Q200 certification (upgrade feature)

Substitute parts are categorized as Direct Equivalents (identical tolerance and specifications) or Upgrades (improved tolerance or additional certifications while maintaining core electrical parameters).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Operating Temp	Features	RoHS3	MSL
RC1608J512CS	Samsung Electro-Mechanics	5.1 kΩ	±5%	0.1W	0603	±100ppm/°C	-55~155°C	Moisture Resistant	Yes	1
RC0603JR-075K1L	YAGEO	5.1 kΩ	±5%	0.1W	0603	±100ppm/°C	-55~155°C	Moisture Resistant	Yes	1
RC0603FR-075K1L	YAGEO	5.1 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	Moisture Resistant	Yes	1
CRG0603F5K1	TE Connectivity	5.1 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	None	Yes	1
ERJ-3EKF5101V	Panasonic	5.1 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200	Yes	1
ERJ-3GEYJ512V	Panasonic	5.1 kΩ	±5%	0.1W	0603	±200ppm/°C	-55~155°C	AEC-Q200	Yes	1
KTR03EZPF5101	Rohm Semiconductor	5.1 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200, High Voltage	Yes	1
RMCF0603FT5K10	Stackpole Electronics	5.1 kΩ	±1%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200	Yes	1
RMCF0603JG5K10	Stackpole Electronics	5.1 kΩ	±5%	0.1W	0603	±200ppm/°C	-55~155°C	AEC-Q200	Yes	1
AC0603JR-075K1L	YAGEO	5.1 kΩ	±5%	0.1W	0603	±100ppm/°C	-55~155°C	AEC-Q200, Moisture Resistant	Yes	1

Engineering Selection Recommendations

Direct Equivalent Selection (RC0603JR-075K1L)

The YAGEO RC0603JR-075K1L provides direct electrical and mechanical equivalence to the RC1608J512CS. Both parts share identical tolerance (±5%), temperature coefficient (±100ppm/°C), and moisture-resistant characteristics. This part is suitable for direct replacement in existing designs without circuit re-evaluation. YAGEO maintains Active product status with RoHS3 compliance and MSL Level 1 rating.

Tolerance-Upgraded Selection (RC0603FR-075K1L, CRG0603F5K1, RMCF0603FT5K10)

These parts maintain all core electrical parameters while providing improved tolerance specification of ±1% compared to the original ±5%. Selection from this group is appropriate when circuit design requires tighter resistance tolerance without changing package or thermal characteristics. All three manufacturers (YAGEO, TE Connectivity, Stackpole Electronics) maintain Active product status and full RoHS3 compliance.

Automotive-Grade Selection (ERJ-3EKF5101V, ERJ-3GEYJ512V, KTR03EZPF5101, RMCF0603FT5K10, AC0603JR-075K1L)

These parts incorporate AEC-Q200 automotive qualification in addition to standard specifications. Selection from this group is required for automotive applications, industrial environments with enhanced reliability requirements, or designs requiring documented automotive-grade component traceability. KTR03EZPF5101 additionally provides high-voltage rated characteristics.

Tolerance and Automotive Combined (ERJ-3EKF5101V, KTR03EZPF5101, RMCF0603FT5K10)

These parts combine ±1% tolerance improvement with AEC-Q200 automotive certification, providing both enhanced precision and automotive-grade reliability in a single component selection.

Frequently Asked Questions (FAQ)

Q: Can RC0603JR-075K1L directly replace RC1608J512CS without circuit modification?

A: Yes. RC0603JR-075K1L is a direct equivalent with identical resistance (5.1 kOhms), tolerance (±5%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Both parts are moisture-resistant and RoHS3 compliant with MSL Level 1 rating.

Q: What is the difference between ±5% and ±1% tolerance parts?

A: Tolerance specifies the maximum allowable deviation from the nominal resistance value. RC1608J512CS with ±5% tolerance allows resistance between 4.845 kOhms and 5.355 kOhms. Upgraded parts with ±1% tolerance allow resistance between 5.049 kOhms and 5.151 kOhms. Selection of ±1% parts is necessary only when circuit design requires tighter resistance control.

Q: Are AEC-Q200 certified parts suitable for non-automotive applications?

A: Yes. AEC-Q200 certification indicates automotive-grade reliability and testing standards. Parts meeting AEC-Q200 (such as ERJ-3EKF5101V, KTR03EZPF5101, RMCF0603FT5K10, and AC0603JR-075K1L) are fully compatible with non-automotive applications and provide enhanced reliability margins.

Q: What packaging formats are available for 5.1 kOhms 0603 resistors?

A: Available packaging formats include Cut Tape (CT) and Tape & Reel (TR). RC1608J512CS and RC0603JR-075K1L are available in Cut Tape format. Most upgraded alternatives are supplied in Tape & Reel format for automated assembly. Selection depends on assembly process requirements and volume specifications.

Q: Can parts with ±200ppm/°C temperature coefficient replace parts with ±100ppm/°C?

A: Substitution is application-dependent. Parts with ±200ppm/°C temperature coefficient (ERJ-3GEYJ512V and RMCF0603JG5K10) exhibit greater resistance variation across temperature extremes. These parts are suitable for applications with relaxed temperature stability requirements. For circuits requiring stable resistance across the full -55°C to 155°C operating range, parts with ±100ppm/°C coefficient are preferred.

Q: What is MSL Level 1 rating significance?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture baking requirements. All listed substitute parts maintain MSL Level 1 rating, ensuring compatibility with standard storage and handling procedures without special moisture control measures.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance status, ensuring compatibility with RoHS3 regulated applications and supply chain requirements.

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